Cylinder Head Flow Data At 28" H2O

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Cylinder Head Flow Data Table
AMC
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 Average
Intake / Exhaust
AMC 291 Iron173/732.025/1.620N/A----225/155
68.89%
463 hp		---N/A
N/A
1.301/2.123
AMC SS IronN/A2.080/1.660N/A-----264/-
543 hp
589 hp		---
Edelbrock 60119 Alum185/702.020/1.6005465/52
80.00%		130/96
73.85%		192/127
66.15%		235/163
69.36%
483 hp		258/182
70.54%
531 hp		260/190
73.08%
535 hp
580 hp		--190.0/135.0
71.05%
1.405/2.714
Indy 401-SR Alum235/1052.100/1.65061-136/123
90.44%		195/159
81.54%		233/178
76.39%
479 hp		259/186
71.81%
533 hp		272/191
70.22%
560 hp
607 hp		272/192
70.59%
607 hp		-227.8/171.5
75.27%
1.157/1.829
Indy 401-SR Full Porting AlumN/A2.100/1.650N/A-141/123
87.23%		204/155
75.98%		253/181
71.54%
520 hp		287/207
72.13%
590 hp		311/225
72.35%
640 hp
694 hp		322/237
73.60%
719 hp		-253.0/188.0
74.31%
Indy 401-1 Alum245/1102.190/1.81058-139/114
82.01%		195/147
75.38%		241/172
71.37%
496 hp		272/189
69.49%
560 hp		288/197
68.40%
592 hp
643 hp		288/205
71.18%
643 hp		-237.2/170.7
71.96%
1.176/1.864
Indy 401-1 Full Porting AlumN/A2.190/1.810N/A-147/120
81.63%		208/158
75.96%		257/186
72.37%
529 hp		297/207
69.70%
611 hp		329/224
68.09%
677 hp
734 hp		354/238
67.23%
790 hp		-265.3/188.8
71.17%
Indy 401-1 CNC Alum325/-2.250/-N/A------390/-
870 hp		-N/A
N/A
1.200


Buick
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
Buick GNN/A-N/A----156/110
70.51%
240.7 hp		---
Buick Stage I IronN/A2.130/1.750N/A-----230/189
82.17%
473 hp
513 hp		--
Buick Stage I Ported IronN/A-N/A-----295/205
69.49%
607 hp
658 hp		--
Buick Stage IIN/A2.130/1.750N/A-----236/213
90.25%
485 hp
527 hp		--
Buick Stock 455 Iron184/142-N/A-----220/150
68.18%
453 hp
491 hp		-N/A
N/A
1.196/1.056
Buick 430 #985 Ported TA IronN/A-
4.350		N/A-142/109
76.76%		202/155
76.73%		250/176
70.40%
514 hp		287/199
69.34%
590 hp		300/204
68.00%
617 hp
670 hp		-236.2/168.6
71.38%
TA Performance ported 455 IronN/A2.130/1.750N/A-----250/180
72.00%
514 hp
558 hp		--
TA Performance
stage 2 Alum		N/A2.130/1.750N/A-----300/240
80.00%
617 hp
670 hp		--
TA Performance
stage 3 Alum		N/A2.250/1.800N/A-----330/255
77.27%
679 hp
737 hp		--
TA Performance stage 3 Alum Ported Bruce KentN/A2.225/1.800N/A-----330/255
77.27%
679 hp
737 hp		385/295
76.62%
859 hp		357.5/275.0
76.92%
TA Performance
stage 4 Alum		N/A2.250/1.800N/A-----375/265
70.67%
771 hp
837 hp		--


Cadillac
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
Bulldog PerformanceN/A2.190/1.8407665/61
93.85%		125/117
93.60%		178/159
89.33%		238/203
85.29%
490 hp		285/219
76.84%
586 hp		307/235
76.55%
632 hp
685 hp		302/242
80.13%
674 hp		214.3/176.6
82.40%


Chevy
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 .900"
Intake / Exhaust		 1.000"
Intake / Exhaust		 Average
Intake / Exhaust
Chevy Bow Tie171/-2.020/1.600N/A----212/145
68.40%
436 hp		211/147
69.67%
434 hp
471 hp		----211.5/146.0
69.03%
1.240
Chevy Bow Tie178/--N/A-----221/138
62.44%
455 hp
493 hp		----N/A
N/A
1.242
Chevy Bow Tie #2N/A-N/A----250/174
69.60%
514 hp		------
Chevy Bow Tie Phase II CCM184/55-6463/57
90.48%		130/100
76.92%		177/119
67.23%		205/123
60.00%
422 hp		225/123
54.67%
463 hp		210/127
60.48%
432 hp
469 hp		209/127
60.77%
466 hp		---174.1/110.9
63.66%
1.223/2.309
Chevy '186 Fuelie Iron161/65-6460/38
63.33%		113/76
67.26%		159/110
69.18%		182/125
68.68%
374 hp		187/135
72.19%
385 hp		188/140
74.47%
387 hp
420 hp		----148.2/104.0
70.19%
1.168/2.154
Chevy '441 Iron CHP155/621.940/1.500
-
No Pipe		7655/45
81.82%		110/80
72.73%		160/112
70.00%		194/127
65.46%
399 hp		201/136
67.66%
413 hp		203/139
68.47%
418 hp
453 hp		----153.8/106.5
69.23%
1.310/2.242
Chevy '441 Iron CHP155/621.940/1.500
-
Pipe		7655/45
81.82%		110/83
75.45%		160/118
73.75%		194/133
68.56%
399 hp		201/146
72.64%
413 hp		203/148
72.91%
418 hp
453 hp		----153.8/112.2
72.91%
1.310/2.387
Chevy '461 Iron161/632.020/1.60064----216/137
63.43%
444 hp		-----N/A
N/A
1.342/2.175
Chevy '461 Ported IronN/A2.020/1.600
4.060		N/A94/65
69.15%		152/102
67.11%		183/126
68.85%		210/147
70.00%
432 hp		224/162
72.32%
461 hp		232/172
74.14%
477 hp
518 hp		238/180
75.63%
531 hp		---190.4/136.3
71.57%
Chevy '461X Iron172/62-64-----------
Chevy '462 Iron157/641.940/1.50062-119/91
76.47%		167/119
71.26%		198/134
67.68%
407 hp		216/139
64.35%
444 hp		218/142
65.14%
448 hp
487 hp		----183.6/125.0
68.08%
1.389/2.219
Chevy '462 Iron CCM157/641.940/1.500
-
No Pipe		6250/54
108.0%		119/88
73.95%		167/116
69.46%		198/128
64.65%
407 hp		212/134
63.21%
436 hp		218/137
62.84%
448 hp
487 hp		----160.7/109.5
68.15%
1.389/2.141
Chevy '462 Iron CCM157/641.940/1.500
-
Pipe		6250/54
108.0%		119/91
76.47%		167/121
72.46%		198/134
67.68%
407 hp		212/139
65.57%
436 hp		218/142
65.14%
448 hp
487 hp		----160.7/113.5
70.64%
1.389/2.219
Chevy '492 Iron157/622.020/1.60064--173/125
72.25%		198/137
69.19%
407 hp		206/141
68.45%
424 hp		209/141
67.46%
430 hp
466 hp		----196.5/136.0
69.21%
1.331/2.274
Chevy '882 Iron CCM151/591.940/1.500
-
No Pipe		7670/58
82.86%		125/108
86.40%		175/135
77.14%		204/141
69.12%
420 hp		205/142
69.27%
422 hp		206/142
68.93%
424 hp
460 hp		----164.2/121.0
73.71%
1.364/2.407
Chevy '882 Iron CCM151/591.940/1.500
-
Pipe		7670/59
84.29%		125/109
87.20%		175/136
77.71%		204/143
70.10%
420 hp		205/144
70.24%
422 hp		206/145
70.39%
424 hp
460 hp		----164.2/122.7
74.72%
1.364/2.458
Chevy LB4 SycloneN/A-N/A----165/119
72.12%
339 hp		------
GM LS-1 Alum204/-2.000/1.55065-123/108
87.80%		180/147
81.67%		219/172
78.54%
451 hp		231/193
83.55%
475 hp		-----188.3/155.0
82.34%
1.132
GM LS-1 Alum CHP204/-2.000/1.550
-
Pipe		6583/62
74.70%		134/104
77.61%		189/136
71.96%		222/165
74.32%
457 hp		240/179
74.58%
494 hp		252/185
73.41%
518 hp
562 hp		----186.7/138.5
74.20%
1.235
GM LS-1 Ported AP Engineering Alum235/-2.020/1.575
3.970		N/A73/54
73.97%		150/111
74.00%		207/155
74.88%		252/195
77.38%
518 hp		285/221
77.54%
586 hp		292/231
79.11%
601 hp
652 hp		301/237
78.74%
672 hp		---222.9/172.0
77.18%
1.281
Chevy LS6N/A-N/A-----236/185
78.39%
485 hp
527 hp		-----
Chevy LT-1170/62-58---187/139
74.33%
385 hp		190/145
76.32%
391 hp		-----188.5/142.0
75.33%
1.118/2.339
Chevy LT-1 #372 Alum CHP170/621.940/1.500
-
No Pipe		5872/52
72.22%		129/100
77.52%		180/130
72.22%		213/142
66.67%
438 hp		214/149
69.63%
440 hp		215/154
71.63%
442 hp
480 hp		----170.5/121.2
71.07%
1.265/2.484
Chevy LT-1 #372 Alum CHP170/621.940/1.500
-
Pipe		5872/53
73.61%		129/101
78.29%		180/136
75.56%		213/155
72.77%
438 hp		214/165
77.10%
440 hp		215/171
79.53%
442 hp
480 hp		----170.5/130.2
76.34%
1.265/2.758
Chevy LT-4 Alum195/-2.000/1.55056-156/121
77.56%		208/149
71.63%		243/177
72.84%
500 hp		265/190
71.70%
545 hp		257/196
76.26%
529 hp
574 hp		----225.8/166.6
73.78%
1.359
Chevy LT-4 Alum CHP195/-2.000/1.550
-
No Pipe		5678/67
85.90%		147/109
74.15%		197/133
67.51%		230/159
69.13%
473 hp		250/172
68.80%
514 hp		243/177
72.84%
500 hp
542 hp		----190.8/136.2
71.35%
1.282
Chevy LT-4 Alum CHP195/-2.000/1.550
-
Pipe		5678/67
85.90%		147/114
77.55%		197/141
71.57%		230/167
72.61%
473 hp		250/180
72.00%
514 hp		243/185
76.13%
500 hp
542 hp		----190.8/142.3
74.59%
1.282
Chevy L98 Alum163/-1.940/1.50058--163/129
79.14%		189/148
78.31%
389 hp		199/164
82.41%
409 hp		199/167
83.92%
409 hp
444 hp		----187.5/152.0
81.07%
1.221
Chevy TurboN/A-N/A-----201/177
88.06%
413 hp
449 hp		-----
Chevy Vortec L29N/A-N/A63/49
77.78%		121/91
75.21%		165/120
72.73%		198/133
67.17%
407 hp		226/140
61.95%
465 hp		242/142
58.68%
498 hp
540 hp		----169.2/112.5
66.50%
Chevy Vortec L31 Iron170/611.940/1.5006458/43
74.14%		114/88
77.19%		173/125
72.25%		216/143
66.20%
444 hp		225/149
66.22%
463 hp		222/152
68.47%
457 hp
495 hp		----168.0/116.7
69.44%
1.324/2.492
Chevy Vortec L31 / #885 Iron CCM170/611.940/1.500
-
No Pipe		6470/48
68.57%		138/101
73.19%		190/129
67.89%		227/140
61.67%
467 hp		239/147
61.51%
492 hp		229/151
65.94%
471 hp
511 hp		----182.2/119.3
65.51%
1.406/2.475
Chevy Vortec L31 / #885 Iron CCM170/611.940/1.500
-
Pipe		6470/49
70.00%		139/105
75.54%		190/137
72.11%		227/151
66.52%
467 hp		239/160
66.95%
492 hp		229/162
70.74%
471 hp
511 hp		----182.3/127.3
69.84%
1.406/2.656
Chevy Vortec Ported McCoyN/A-N/A----266/200
75.19%
547 hp		------
Chevy Vortec / Bow Tie Small Port Iron175/652.000/1.55065----235/161
68.51%
483 hp		236/163
69.07%
485 hp
527 hp		----235.5/162.0
68.79%
1.349/2.508
Chevy Vortec / Bow Tie Large Port Iron206/772.000/1.55065-----268/164
61.19%
551 hp
598 hp		----N/A
N/A
1.301/2.130
AFR LT-1 180 Street Alum180/642.020/1.60056-74-129/108
83.72%		195/156
80.00%		240/178
74.17%
494 hp		255/190
74.51%
525 hp		260/194
74.62%
535 hp
580 hp		----215.8/165.2
76.55%
1.444/3.031
AFR LT-1 190 Street Alum190/642.020/-56-74-129/108
83.72%		195/156
80.00%		240/178
74.17%
494 hp		260/190
73.08%
535 hp		262/194
74.05%
539 hp
585 hp		----217.2/165.2
76.06%
1.379/3.031
AFR LT-4 195 Street Alum195/642.020/1.60056-74-132/108
81.82%		198/156
78.79%		240/178
74.17%
494 hp		260/190
73.08%
535 hp		262/194
74.05%
539 hp
585 hp		----218.4/165.2
75.64%
1.344/3.031
AFR LT-4 210 Race Alum210/802.080/1.60076-135/112
82.96%		197/145
73.60%		245/185
75.51%
504 hp		273/205
75.09%
562 hp		282/215
76.24%
580 hp
629 hp		285/220
77.19%
636 hp		---236.2/180.3
76.36%
1.357/2.750
AFR LT-4 220 Race Alum220/802.080/1.60076-132/112
84.85%		190/145
76.32%		248/185
74.60%
510 hp		280/205
73.21%
576 hp		286/215
75.17%
588 hp
638 hp		292/220
75.34%
652 hp		---238.0/180.3
75.77%
1.327/2.750
AFR LT-4 227 Race Alum227/802.100/1.600N/A-135/112
82.96%		192/145
75.52%		250/185
74.00%
514 hp		288/205
71.18%
592 hp		292/215
73.63%
601 hp
652 hp		295/220
74.58%
658 hp		---242.0/180.3
74.52%
1.300/2.750
AFR LS1 Alum205/-2.020/1.60066/76-140/112
80.00%		200/170
85.00%		251/203
80.88%
516 hp		281/221
78.65%
578 hp		292/226
77.40%
601 hp
652 hp		301/230
76.41%
672 hp		---244.2/193.7
79.32%
1.468
AFR 180 Street Alum180/-2.020/1.60068-74-129/108
83.72%		195/156
80.00%		240/178
74.17%
494 hp		255/190
74.51%
525 hp		260/194
74.62%
535 hp
580 hp		----215.8/165.2
76.55%
1.444
AFR 180 Comp AlumN/A2.020/1.60074-144/102
70.83%		206/152
73.79%		245/190
77.55%
504 hp		260/204
78.46%
535 hp		268/211
78.73%
551 hp
598 hp		----224.6/171.8
76.49%
AFR 190 Street Alum190/--68-74-129/108
83.72%		195/156
80.00%		240/178
74.17%
494 hp		260/190
73.08%
535 hp		262/194
74.05%
539 hp
585 hp		----217.2/165.2
76.06%
1.379
AFR 190 Comp AlumN/A-74-135/110
81.48%		201/157
78.11%		243/180
74.07%
500 hp		264/195
73.86%
543 hp		276/208
75.36%
568 hp
616 hp		----223.8/170.0
75.96%
AFR 195 Street Alum195/642.020/1.60068-74-132/108
81.82%		198/156
78.79%		240/178
74.17%
494 hp		260/190
73.08%
535 hp		262/194
74.05%
539 hp
585 hp		----218.4/165.2
75.64%
1.344/3.031
AFR 195 Comp AlumN/A2.020/1.60074-135/110
81.48%		201/157
78.11%		249/180
72.29%
512 hp		275/195
70.91%
566 hp		280/208
74.29%
576 hp
625 hp		----228.0/170.0
74.56%
AFR 210 Race Alum210/802.080/1.60076-135/112
82.96%		197/145
73.60%		245/185
75.51%
504 hp		273/205
75.09%
562 hp		282/215
76.24%
580 hp
629 hp		285/220
77.19%
636 hp		---236.2/180.3
76.36%
1.357/2.750
AFR 220 Race Alum220/802.080/1.60076-132/112
84.85%		190/145
76.32%		248/185
74.60%
510 hp		280/205
73.21%
576 hp		286/215
75.17%
588 hp
638 hp		292/220
75.34%
652 hp		---238.0/180.3
75.77%
1.327/2.750
AFR 227 Race Alum227/802.100/1.600N/A-135/112
82.96%		192/145
75.52%		250/185
74.00%
514 hp		288/205
71.18%
592 hp		292/215
73.63%
601 hp
652 hp		295/220
74.58%
658 hp		---242.0/180.3
74.52%
1.300/2.750
AFR 18 Degree GM243/100-65-147/109
74.15%		219/160
73.06%		273/204
74.73%
562 hp		319/230
72.10%
656 hp		329/246
74.77%
677 hp
734 hp		340/255
75.00%
759 hp		---271.2/200.7
74.00%
1.399/2.550
AFR 23 Degree 215215/80-76-150/112
74.67%		220/150
68.18%		276/190
68.84%
568 hp		308/207
67.21%
634 hp		315/220
69.84%
648 hp
703 hp		325/230
70.77%
725 hp		---265.7/184.8
69.57%
1.512/2.875
Brodix CARB Legal Al170/-2.020/1.60067-132/93
70.45%		185/134
72.43%		217/159
73.27%
446 hp		215/174
80.93%
442 hp		212/180
84.91%
436 hp
473 hp		----192.2/148.0
77.00%
1.276
Brodix -8 STD FSH CARB Legal Al185/-2.080/1.60067-134/106
79.10%		191/135
70.68%		229/152
66.38%
471 hp		233/159
68.24%
479 hp		-----196.8/138.0
70.14%
1.259
Brodix -8 STD or SP194/-2.080/1.60067-134/109
81.34%		191/138
72.25%		230/155
67.39%
473 hp		240/161
67.08%
494 hp		-----198.8/140.8
70.82%
1.237
Brodix -8 PRO Alum185/-2.020/1.60067-134/106
79.10%		191/135
70.68%		230/153
66.52%
473 hp		240/160
66.67%
494 hp		-----198.8/138.5
69.69%
1.297
Brodix -10 STD or SP210/-2.080/1.60067-145/109
75.17%		194/138
71.13%		239/155
64.85%
492 hp		253/161
63.64%
520 hp		261/166
63.60%
537 hp
583 hp		261/167
63.98%
583 hp		---225.5/149.3
66.22%
1.243
Brodix -11 STD or SP221/-2.080/1.60067-132/109
82.58%		188/138
73.40%		232/155
66.81%
477 hp		260/161
61.92%
535 hp		256/166
64.84%
527 hp
571 hp		258/167
64.73%
576 hp		---221.0/149.3
67.57%
1.176
Brodix -18 STD X244/-2.140/1.60068-157/106
67.52%		212/145
68.40%		260/179
68.85%
535 hp		303/195
64.36%
623 hp		319/205
64.26%
656 hp
712 hp		325/211
64.92%
725 hp		---262.7/173.5
66.05%
1.332
Brodix -18 SP X244/-2.140/1.60068-157/122
77.71%		212/164
77.36%		260/200
76.92%
535 hp		303/217
71.62%
623 hp		319/226
70.85%
656 hp
712 hp		325/233
71.69%
725 hp		---262.7/193.7
73.73%
1.332
Brodix Track I215/--69-128/111
86.72%		183/149
81.42%		229/179
78.17%
471 hp		268/193
72.01%
551 hp		269/207
76.95%
553 hp
600 hp		----215.4/167.8
77.90%
1.251
Canfield 23-500-65 Alum195/-2.055/1.6006572/53
73.61%		145/107
73.79%		201/143
71.14%		247/175
70.85%
508 hp		258/190
73.64%
531 hp		259/200
77.22%
533 hp
578 hp		259/203
78.38%
578 hp		---205.9/153.0
74.32%
1.328
Canfield 23-600-65 Alum220/-2.080/1.6006572/52
72.22%		145/105
72.41%		206/146
70.87%		252/184
73.02%
518 hp		288/203
70.49%
592 hp		302/219
72.52%
621 hp
674 hp		306/227
74.18%
683 hp		---224.4/162.3
72.31%
1.391
Dart 180 Iron Eagle180/-2.020/1.600
4.030
No Pipe		65.9-139/114
82.01%		190/145
76.32%		218/164
75.23%
448 hp		222/172
77.48%
457 hp		218/174
79.82%
448 hp
487 hp		----197.4/153.8
77.91%
1.233
Dart 200 Iron Eagle200/-2.020/1.600
4.030
No Pipe		65.9-129/114
88.37%		186/145
77.96%		229/164
71.62%
471 hp		261/172
65.90%
537 hp		252/174
69.05%
518 hp
562 hp		----211.4/153.8
72.75%
1.305
Dart 215 Iron Eagle215/-2.055/1.600
4.030
No pipe		65.9-127/114
89.76%		178/145
81.46%		216/164
75.93%
444 hp		249/172
69.08%
512 hp		268/174
64.93%
551 hp
598 hp		----207.6/153.8
74.08%
1.247
Dart 230 Iron Eagle230/-2.080/1.600
4.155
No Pipe		65.9-129/115
89.15%		184/158
85.87%		231/185
80.09%
475 hp		271/199
73.43%
557 hp		296/205
69.26%
609 hp
661 hp		308/207
67.21%
687 hp		---236.5/178.2
75.33%
1.339
Dart 200 Iron Eagle Platinum200/-2.020/-
4.030
No Pipe		N/A-130/109
83.85%		194/158
81.44%		242/198
81.82%
498 hp		274/208
75.91%
564 hp		283/214
75.62%
582 hp
632 hp		----224.6/177.4
78.98%
1.415
Dart 215 Iron Eagle Platinum215/-2.050/-
4.030
No Pipe		N/A-136/109
80.15%		193/158
81.87%		239/198
82.85%
492 hp		273/208
76.19%
562 hp		289/214
74.05%
595 hp
645 hp		293/219
74.74%
654 hp		---237.2/184.3
77.72%
1.363
Dart 230 Iron Eagle Platinum230/-2.080/-
4.150
No Pipe		N/A-138/109
78.99%		201/158
78.61%		247/198
80.16%
508 hp		280/208
74.29%
576 hp		297/214
72.05%
611 hp
663 hp		306/219
71.57%
683 hp		---244.8/184.3
75.29%
1.330
PRO1 180 Alum180/742.020/1.600
4.030
No Pipe		N/A-134/114
85.07%		187/145
77.54%		231/164
71.00%
475 hp		257/172
66.93%
529 hp		261/174
66.67%
537 hp
583 hp		264/175
66.29%
589 hp		---222.3/157.3
70.76%
1.467/2.365
PRO1 CNC Full Port 227 Alum227/852.080/1.625
4.155
No Pipe		66-158/117
74.05%		209/149
71.29%		257/182
70.82%
529 hp		293/211
72.01%
603 hp		302/220
72.85%
621 hp
674 hp		309/226
73.14%
690 hp		314/232
73.89%
788 hp		--263.1/191.0
72.58%
1.383/2.729
Dart Alum 23 Deg 220 Full Port240/-21.00/1.600
-
No Pipe		N/A-147/117
79.59%		202/189
93.56%		253/220
86.96%
520 hp		287/236
82.23%
590 hp		310/246
79.35%
638 hp
692 hp		320/250
78.13%
714 hp		324/251
77.47%
813 hp		--263.3/215.6
81.88%
1.350
Dart 18 Deg Super Mod246/1052.150/1.600
-
No Pipe		N/A-165/131
79.39%		210/165
78.57%		270/195
72.22%
555 hp		321/235
73.21%
660 hp		353/249
70.54%
726 hp
788 hp		357/253
70.87%
797 hp		---279.3/204.7
73.27%
1.451/2.410
Dart 18 Deg Full Port252/1052.150/1.600
4.155
No Pipe		N/A-132/101
76.52%		194/144
74.23%		252/198
78.57%
518 hp		305/217
71.15%
627 hp		347/227
65.42%
714 hp
774 hp		365/241
66.03%
815 hp		358/241
67.32%
899 hp		--279.0/195.6
70.10%
1.448/2.295
Dart 18 Deg Full Port263/1082.150/1.600
4.155
No Pipe		N/A-183/131
71.58%		243/169
69.55%		295/225
76.27%
607 hp		342/246
71.93%
704 hp		364/263
72.25%
749 hp
812 hp		368/268
72.83%
821 hp		363/272
74.93%
911 hp		--308.3/224.9
72.94%
1.399/2.519
Dart 18 Deg Full Port275/1102.180/1.600
-
No Pipe		N/A-165/131
79.39%		210/173
82.38%		272/230
84.56%
560 hp		326/249
76.38%
671 hp		360/263
73.06%
741 hp
803 hp		378/270
71.43%
844 hp		---285.2/219.3
76.91%
1.375/2.455
Dart Alum 18 Deg257/--
-
No Pipe		N/A-145/114
78.62%		211/174
82.46%		270/217
80.37%
555 hp		321/241
75.08%
660 hp		346/251
72.54%
712 hp
772 hp		350/258
73.71%
781 hp		340/262
77.06%
853 hp		--283.3/216.7
76.50%
1.362
Dart Alum 18 Deg270/--
-
No Pipe		N/A-162/114
70.37%		232/174
75.00%		293/217
74.06%
603 hp		332/241
72.59%
683 hp		359/251
69.92%
739 hp
801 hp		366/258
70.49%
817 hp		366/262
71.58%
919 hp		--301.4/216.7
71.90%
1.356
Dart Alum 16 Deg Full Port263/1082.150/1.600
-
No Pipe		N/A-145/119
82.07%		219/173
79.00%		280/213
76.07%
576 hp		325/240
73.85%
669 hp		358/257
71.79%
736 hp
799 hp		379/264
69.66%
846 hp		383/268
69.97%
961 hp		--298.4/219.1
73.43%
1.456/2.481
Dart Alum 16 Deg Full Port Lrg281/1192.200/1.625
-
No Pipe		N/A-163/106
65.03%		228/149
65.35%		286/191
66.78%
588 hp		340/219
64.41%
699 hp		377/234
62.07%
776 hp
841 hp		387/247
63.82%
864 hp		392/251
64.03%
984 hp		--310.4/199.6
64.29%
1.395/2.109
Dart Little Chief 11 Deg 275 Alum275/1082.230/1.550
4.155
No Pipe		N/A-162/138
85.19%		240/186
77.50%		306/241
78.76%
629 hp		350/266
76.00%
720 hp		372/274
73.66%
765 hp
830 hp		376/278
73.94%
839 hp		384/280
72.92%
964 hp		389/282
72.49%
976 hp		392/282
71.94%
984 hp		330.1/247.4
74.96%
1.425/2.611
Dart Little Chief 11 Deg 315 Alum315/1082.230/1.550
4.155
No Pipe		N/A-158/138
87.34%		235/186
79.15%		300/241
80.33%
617 hp		352/266
75.57%
724 hp		385/274
71.17%
792 hp
859 hp		401/278
69.33%
895 hp		405/280
69.14%
1016 hp		410/282
68.78%
1029 hp		415/282
67.95%
1042 hp		340.1/247.4
72.75%
1.317/2.611
Edelbrock #6071, #6073 Alum OLD170/602.020/1.6007072/61
84.72%		134/105
78.36%		188/140
74.47%		224/160
71.43%
461 hp		233/172
73.82%
479 hp		233/179
76.82%
479 hp
520 hp		----180.7/136.2
75.37%
1.371/2.983
Edelbrock #60719, #60739 Performer RPM Alum170/602.020/1.6007073/61
83.56%		140/108
77.14%		200/144
72.00%		238/163
68.49%
490 hp		244/175
71.72%
502 hp		244/183
75.00%
502 hp
545 hp		----189.8/139.0
73.22%
1.435/3.050
Edelbrock #60859, #60879 Performer Centerbolt Alum165/602.020/1.6006064/54
84.38%		122/96
78.69%		177/124
70.06%		217/147
67.74%
446 hp		229/166
72.49%
471 hp		232/175
75.43%
477 hp
518 hp		----173.5/127.0
73.20%
1.406/2.917
Edelbrock #60899, #60909, #60999 Performer RPM Alum170/602.020/1.6006467/58
86.57%		130/108
83.08%		183/144
78.69%		226/169
74.78%
465 hp		229/175
76.42%
471 hp		232/182
78.45%
477 hp
518 hp		----177.8/139.3
78.35%
1.365/3.033
Edelbrock #60979 E-Tec 170 Alum170/701.940/1.5506464/54
84.38%		130/104
80.00%		186/140
75.27%		220/169
76.82%
453 hp		232/183
78.88%
477 hp		238/190
79.83%
490 hp
531 hp		----178.3/140.0
78.50%
1.400/2.714
Edelbrock #60989 E-Tec 200 Alum200/802.020/1.6006467/57
85.07%		122/110
90.16%		175/153
87.43%		223/182
81.61%
459 hp		252/196
77.78%
518 hp		259/204
78.76%
533 hp
578 hp		265/207
78.11%
591 hp		---194.7/158.4
81.36%
1.325/2.588
Edelbrock/Chapman #61049 Alum236/1002.135/1.625
-
No Pipe		5271/54
76.06%		159/108
67.92%		224/182
81.25%		273/222
81.32%
562 hp		305/238
78.03%
627 hp		314/250
79.62%
646 hp
701 hp		323/260
80.50%
721 hp		---238.4/187.7
78.73%
1.369/2.600
Edelbrock #61069 Alum252/1002.180/1.6255272/54
75.00%		161/108
67.08%		232/182
78.45%		286/222
77.62%
588 hp		321/238
74.14%
660 hp		342/250
73.10%
704 hp
763 hp		345/260
75.36%
770 hp		---251.3/187.7
74.70%
1.369/2.600
Edelbrock #61089 Alum256/1002.180/1.6255272/54
75.00%		161/108
67.08%		233/182
78.11%		286/222
77.62%
588 hp		321/238
74.14%
660 hp		344/250
72.67%
708 hp
768 hp		348/260
74.71%
777 hp		---252.1/187.7
74.45%
1.359/2.600
Edelbrock #61109 Alum236/1002.125/1.6256571/54
76.06%		159/108
67.92%		224/182
81.25%		273/222
81.32%
562 hp		305/238
78.03%
627 hp		314/250
79.62%
646 hp
701 hp		323/260
80.50%
721 hp		---238.4/187.7
78.73%
1.369/2.600
Edelbrock #61119 Victor 15 Deg. Ported Chapman Alum283/1002.180/1.625
-
No Pipe		4363/48
76.19%		137/113
82.48%		215/177
82.33%		281/217
77.22%
578 hp		327/240
73.39%
673 hp		363/254
69.97%
747 hp
810 hp		381/260
68.24%
850 hp		---252.4/187.0
74.08%
1.346/2.600
Edelbrock #61129 Alum252/1002.180/1.6256572/54
75.00%		161/108
67.08%		232/182
78.45%		286/222
77.62%
588 hp		321/238
74.14%
660 hp		342/250
73.10%
704 hp
763 hp		345/260
75.36%
770 hp		---251.3/187.7
74.70%
1.369/2.600
Edelbrock #61139 Victor 15 Deg. Ported Chapman Alum317/1002.250/1.625
-
No Pipe		4570/49
70.00%		142/118
83.10%		216/175
81.02%		280/212
75.71%
576 hp		328/241
73.48%
675 hp		368/257
69.84%
757 hp
821 hp		398/267
67.09%
888 hp		404/271
67.08%
1014 hp		--275.8/198.8
72.08%
1.274/2.710
Edelbrock #61149 Alum256/1002.180/1.6256572/54
75.00%		161/108
67.08%		233/182
78.11%		286/222
77.62%
588 hp		321/238
74.14%
660 hp		344/250
72.67%
708 hp
768 hp		348/260
74.71%
777 hp		---252.1/187.7
74.45%
1.359/2.600
Edelbrock #61159 Alum246/1002.180/1.6255272/54
75.00%		161/108
67.08%		232/182
78.45%		286/222
77.62%
588 hp		321/238
74.14%
660 hp		340/250
73.53%
699 hp
759 hp		342/260
76.02%
763 hp		---250.6/187.7
74.91%
1.390/2.600
Edelbrock #61169 Alum266/1002.180/1.6255271/54
76.06%		151/108
71.52%		226/182
80.53%		271/222
81.92%
557 hp		323/238
73.68%
664 hp		350/250
71.43%
720 hp
781 hp		355/260
73.24%
792 hp		---249.6/187.7
75.21%
1.335/2.600
Edelbrock #61179 Alum270/1052.180/1.6254771/51
71.83%		151/114
75.50%		226/180
79.65%		271/213
78.60%
557 hp		323/240
74.30%
664 hp		350/248
70.86%
720 hp
781 hp		355/255
71.83%
792 hp		---249.6/185.9
74.47%
1.315/2.429
Edelbrock #61189 Alum246/1002.180/1.6256572/54
75.00%		161/108
67.08%		232/182
78.45%		286/222
77.62%
588 hp		321/238
74.14%
660 hp		340/250
73.53%
699 hp
759 hp		342/260
76.02%
763 hp		---250.6/187.7
74.91%
1.390/2.600
Edelbrock #61199 Alum266/1002.180/1.6256571/54
76.06%		151/108
71.52%		226/182
80.53%		271/222
81.92%
557 hp		323/238
73.68%
664 hp		350/250
71.43%
720 hp
781 hp		355/260
73.24%
792 hp		---249.6/187.7
75.21%
1.335/2.600
Edelbrock/Chapman #61209 Alum238/852.125/1.625
-
No Pipe		7168/54
79.41%		147/106
72.11%		221/181
81.90%		265/212
80.00%
545 hp		293/228
77.82%
603 hp		312/235
75.32%
642 hp
696 hp		317/240
75.71%
708 hp		---231.9/179.4
77.39%
1.332/2.824
Edelbrock/Chapman #61229 Alum243/852.125/1.625
-
No Pipe		7167/54
80.60%		147/106
72.11%		221/181
81.90%		269/212
78.81%
553 hp		299/228
76.25%
615 hp		310/235
75.81%
638 hp
692 hp		315/240
76.19%
703 hp		---232.6/179.4
77.15%
1.296/2.824
Edelbrock/Chapman #61249 Victor 23 Deg. Alum247/852.125/1.625
-
No Pipe		7171/54
76.06%		146/106
72.60%		222/181
81.53%		268/212
79.10%
551 hp		299/228
76.25%
615 hp		314/235
74.84%
646 hp
701 hp		321/240
74.77%
716 hp		---234.4/179.4
76.54%
1.300/2.824
Edelbrock #61909 Performer LT1 Alum170/601.940/1.5505461/52
85.25%		117/100
85.47%		174/140
80.46%		220/167
75.91%
453 hp		242/184
76.03%
498 hp		232/192
82.76%
477 hp
518 hp		----174.3/139.2
79.83%
1.424/3.200
Edelbrock #77569, #77579, #77589, #77599, #77619, #77629, #77639, #77649 Victor Jr. 23 Deg. Alum215/852.080/1.60064/7067/64
95.52%		119/112
94.12%		177/153
86.44%		226/188
83.19%
465 hp		265/207
78.11%
545 hp		281/217
77.22%
578 hp
627 hp		285/220
77.19%
636 hp		---202.9/165.9
81.76%
1.326/2.588
HRD All Pro 23 DegreeN/A2.125/1.610N/A-148/120
81.08%		221/165
74.66%		275/235
85.45%
566 hp		312/257
82.37%
642 hp		329/266
80.85%
677 hp
734 hp		344/270
78.49%
768 hp		---271.5/218.8
80.60%
HRD AFR 215245/-2.125/1.610N/A-142/111
78.17%		215/162
75.35%		271/222
81.92%
557 hp		310/244
78.71%
638 hp		328/251
76.52%
675 hp
732 hp		340/254
74.71%
759 hp		---267.7/207.3
77.46%
1.388
HRD GM#580/855 18 Degree255/-2.150/1.625N/A-154/111
72.08%		221/159
71.95%		276/235
85.14%
568 hp		321/251
78.19%
660 hp		355/262
73.80%
730 hp
792 hp		364/270
74.18%
812 hp		---281.8/214.7
76.17%
1.427
HRD GM#12480011 SB2.2N/A-N/A-157/111
70.70%		240/160
66.67%		297/227
76.43%
611 hp		339/254
74.93%
697 hp		364/264
72.53%
749 hp
812 hp		374/272
72.73%
835 hp		380/276
72.63%
954 hp		--307.3/223.4
72.71%
HRD GM#517 Splayed ValN/A2.200/1.625N/A-142/114
80.28%		225/178
79.11%		294/226
76.87%
605 hp		375/257
68.53%
771 hp		375/273
72.80%
771 hp
837 hp		395/283
71.65%
882 hp		406/287
70.69%
1019 hp		411/290
70.56%
1032 hp		-327.9/238.5
72.74%
HRD GM#615x 15 Deg268/-2.180/1.610N/A-151/114
75.50%		218/168
77.06%		270/232
85.93%
555 hp		317/257
81.07%
652 hp		352/271
76.99%
724 hp
786 hp		389/280
71.98%
868 hp		401/283
70.57%
1006 hp		410/285
69.51%
1029 hp		-313.5/236.3
75.36%
1.530
HRD GM#615x 15 Deg285/-2.200/1.610N/A-134/121
90.30%		211/178
84.36%		265/229
86.42%
545 hp		317/259
81.70%
652 hp		357/272
76.19%
734 hp
797 hp		390/278
71.28%
870 hp		410/282
68.78%
1029 hp		422/288
68.25%
1059 hp		-313.3/238.4
76.10%
1.481
Holley 300-570 Alum172/-2.020/1.600
-
Pipe		6972/53
73.61%		134/102
76.12%		188/143
76.06%		223/170
76.23%
459 hp		232/177
76.29%
477 hp		236/180
76.27%
485 hp
527 hp		----180.8/137.5
76.04%
1.372
Holley SysteMax Alum186/-2.020/1.600
-
Pipe		68-130/92
70.77%		184/122
66.30%		222/148
66.67%
457 hp		242/172
71.07%
498 hp		252/187
74.21%
518 hp
562 hp		----206.0/144.2
70.00%
1.355
Pro-Filer 23 Degree210/--64-129/109
84.50%		186/145
77.96%		227/172
75.77%
467 hp		271/187
69.00%
557 hp		284/219
77.11%
584 hp
634 hp		294/232
78.91%
656 hp		---231.8/177.3
76.49%
1.400
Pro 14 Degree as Cast235/-2.125/1.625N/A72/64
88.89%		147/105
71.43%		212/156
73.58%		269/200
74.35%
553 hp		293/226
77.13%
603 hp		312/238
76.28%
642 hp
696 hp		325/245
75.38%
725 hp		---232.9/176.3
75.71%
1.383
Pro 14 Degree CNC Ported305/-2.250/1.625N/A77/67
87.01%		162/119
73.46%		234/189
80.77%		300/229
76.33%
617 hp		353/252
71.39%
726 hp		384/266
69.27%
790 hp
857 hp		401/274
68.33%
895 hp		411/281
68.37%
1032 hp		--290.3/209.6
72.22%
1.348
Pro 23 Degree as Cast235/-2.080/1.60064/7273/60
82.19%		138/114
82.61%		196/152
77.55%		243/178
73.25%
500 hp		274/192
70.07%
564 hp		292/194
66.44%
601 hp
652 hp		312/197
63.14%
696 hp		---218.3/155.3
71.14%
1.328
Trick Flow G2 31500005 CARB190/82-6668/53
77.94%		144/106
73.61%		206/144
69.90%		242/173
71.49%
498 hp		252/195
77.38%
518 hp		257/205
79.77%
529 hp
574 hp		----194.8/146.0
74.94%
1.353/2.500
Trick Flow 18 Degree250/100-56-144/113
78.47%		217/152
70.05%		276/198
71.74%
568 hp		316/219
69.30%
650 hp		328/231
70.43%
675 hp
732 hp		328/237
72.26%
732 hp		---268.2/191.7
71.47%
1.312/2.370
Trick Flow 23 DegreeN/A-64-136/98
72.06%		191/136
71.20%		230/163
70.87%
473 hp		253/177
69.96%
520 hp		254/190
74.80%
523 hp
567 hp		----212.8/152.8
71.80%
World S/R Torque Iron CHP171/822.020/1.600
-
Pipe		67/7668/55
80.88%		128/100
78.13%		179/133
74.30%		205/145
70.73%
422 hp		221/153
69.23%
455 hp		225/155
68.89%
463 hp
502 hp		----171.0/123.5
72.22%
1.316/1.890
World S/R Torque Iron CHP171/822.020/1.600
-
Pipe		67/7668/55
80.88%		128/104
81.25%		179/140
78.21%		205/156
76.10%
422 hp		221/166
75.11%
455 hp		225/170
75.56%
463 hp
502 hp		----171.0/131.8
77.10%
1.316/2.073
World Sportsman II Iron200/642.020/1.600
-
Pipe		64/72--187/131
70.05%		225/150
66.67%
463 hp		240/164
68.33%
494 hp		243/162
66.67%
500 hp
542 hp		----223.8/151.8
67.82%
1.215/2.563


BB Chevy
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 .900"
Intake / Exhaust		 1.000"
Intake / Exhaust		 Average
Intake / Exhaust
Chevy 156 Peanut Iron CHP195/-2.060/1.720
-
No Pipe		11554/35
64.81%		123/84
68.29%		184/117
63.59%		222/141
63.51%
457 hp		226/156
69.03%
465 hp		226/160
70.80%
465 hp
504 hp		227/162
71.37%
507 hp		---180.3/122.1
67.75%
1.164
Chevy 236 Peanut Iron CHP208/-2.060/1.720
-
No Pipe		12056/44
78.57%		125/87
69.60%		183/111
60.66%		215/130
60.47%
442 hp		233/144
61.80%
479 hp		235/150
63.83%
483 hp
525 hp		235/155
65.96%
525 hp		---183.1/117.3
64.04%
1.130
Chevy Oval Port Iron256/1142.060/1.720N/A-----272/189
69.49%
560 hp
607 hp		----N/A
N/A
1.063/1.658
Chevy 049 Oval Port Iron CHP253/1162.060/1.720
-
Pipe		12259/52
88.14%		124/98
79.03%		188/128
68.09%		232/152
65.52%
477 hp		250/177
70.80%
514 hp		264/187
70.83%
543 hp
589 hp		264/192
72.73%
589 hp		265/192
72.45%
665 hp		--205.8/147.3
71.57%
1.047/1.655
Chevy 290 Oval Port Iron CHP253/1122.060/1.720
-
Pipe		10560/47
78.33%		122/90
73.77%		172/118
68.60%		214/138
64.49%
440 hp		244/160
65.57%
502 hp		257/174
67.70%
529 hp
574 hp		260/184
70.77%
580 hp		263/188
71.48%
660 hp		--199.0/137.4
69.03%
1.040/1.679
Chevy 702 Oval Port Iron CHP253/-2.060/1.720
-
Pipe		10157/46
80.70%		121/89
73.55%		179/115
64.25%		214/135
63.08%
440 hp		237/152
64.14%
488 hp		254/173
68.11%
523 hp
567 hp		260/183
70.38%
580 hp		260/188
72.31%
653 hp		--197.8/135.1
68.33%
1.028
Chevy 3993820253/114-11371/52
73.24%		145/105
72.41%		227/144
63.44%		260/176
67.69%
535 hp		279/190
68.10%
574 hp		-----196.4/133.4
67.92%
1.103/1.667
Chevy 188 Iron CHP317/1252.190/1.880
4.250
Pipe		11868/45
66.18%		129/90
69.77%		188/131
69.68%		233/170
72.96%
479 hp		259/188
72.59%
533 hp		291/195
67.01%
599 hp
649 hp		313/200
63.90%
699 hp		---211.6/145.6
68.80%
0.987/1.600
Chevy 401 CHP322/1202.250/1.880
4.250
Pipe		11870/53
75.71%		143/116
81.12%		200/142
71.00%		236/179
75.85%
485 hp		275/204
74.18%
566 hp		310/227
73.23%
638 hp
692 hp		330/244
73.94%
737 hp		340/254
74.71%
853 hp		--238.0/177.4
74.53%
1.056/2.117
Chevy 990 Iron CHP318/1252.190/1.880
4.250
Pipe		11869/53
76.81%		125/103
82.40%		183/140
76.50%		233/176
75.54%
479 hp		264/198
75.00%
543 hp		292/204
69.86%
601 hp
652 hp		----194.3/145.7
74.96%
0.918/1.632
Chevy Rect. Port320-326/1202.190/1.880118-----331/201
60.73%
681 hp
739 hp		-----
Chevy ZL-1 D-port320/1202.190/1.880N/A-----331/213
64.35%
681 hp
739 hp		----N/A
N/A
1.034/1.775
Chevy Alum D-port320/120-N/A----284/206
72.54%
584 hp		310/226
72.90%
638 hp
692 hp		328/238
72.56%
732 hp		---307.3/223.3
72.67%
1.025/1.983
AFR 265 Oval265/-2.190/1.880119-165/135
81.82%		244/169
69.26%		297/219
73.74%
611 hp		324/249
76.85%
667 hp		332/272
81.93%
683 hp
741 hp		----272.4/208.8
76.65%
1.253
AFR 305305/-2.190/1.880
-
No Pipe		119-154/131
85.06%		223/176
78.92%		287/219
76.31%
590 hp		335/251
74.93%
689 hp		363/276
76.03%
747 hp
810 hp		----272.4/210.6
77.31%
1.190
AFR 315 CHP315/--N/A76/62
81.58%		162/133
82.10%		232/199
85.78%		282/256
90.78%
580 hp		321/284
88.47%
660 hp		348/290
83.33%
716 hp
777 hp		368/293
79.62%
821 hp		370/300
81.08%
929 hp		--269.9/227.1
84.16%
1.175
AFR 315 CNC315/-2.250/1.880121-169/146
86.39%		249/184
73.90%		312/238
76.28%
642 hp		353/271
76.77%
726 hp		380/296
77.89%
782 hp
848 hp		386/310
80.31%
862 hp		387/315
81.40%
971 hp		--319.4/251.4
78.71%
1.229
AFR 325325/-2.300/1.880119-142/131
92.25%		213/176
82.63%		280/219
78.21%
576 hp		331/251
75.83%
681 hp		370/276
74.59%
761 hp
826 hp		384/285
74.22%
857 hp		---286.7/223.0
77.79%
1.182
AFR 335 CNC335/-2.300/1.880
-
Pipe		121-164/144
87.80%		240/197
82.08%		304/257
84.54%
625 hp		352/285
80.97%
724 hp		385/311
80.78%
792 hp
859 hp		404/319
78.96%
902 hp		410/325
79.27%
1029 hp		--322.7/262.6
81.36%
1.224
AFR 345345/-2.300/1.880119-141/135
95.74%		212/169
79.72%		279/219
78.49%
574 hp		333/249
74.77%
685 hp		372/272
73.12%
765 hp
830 hp		401/285
71.07%
895 hp		405/290
71.60%
1016 hp		--306.1/231.3
75.55%
1.174
AFR 357 CNC357/-2.300/1.880
-
Pipe		121-167/144
86.23%		242/197
81.40%		307/257
83.71%
632 hp		354/285
80.51%
728 hp		393/311
79.13%
808 hp
877 hp		415/319
76.87%
926 hp		425/325
76.47%
1067 hp		--329.0/262.6
79.81%
1.190
Brodix BB-1 OEFI Alum258/-2.250/1.880119-162/106
65.43%		219/137
62.56%		252/166
65.87%
518 hp		265/190
71.70%
545 hp		272/211
77.57%
560 hp
607 hp		273/225
82.42%
609 hp		---240.5/172.5
71.73%
1.058
Brodix BB-1280/-2.250/1.880119-150/106
70.67%		209/137
65.55%		259/166
64.09%
533 hp		290/190
65.52%
597 hp		300/211
70.33%
617 hp
670 hp		303/225
74.26%
676 hp		---251.8/172.5
68.50%
1.082
Brodix BB-2305/-2.250/1.880119-151/106
70.20%		211/137
64.93%		263/166
63.12%
541 hp		293/190
64.85%
603 hp		312/211
67.63%
642 hp
696 hp		320/225
70.31%
714 hp		---258.3/172.5
66.77%
1.049
Brodix BB-2X340/-2.300/1.880119-154/106
68.83%		211/137
64.93%		260/166
63.85%
535 hp		292/190
65.07%
601 hp		312/211
67.63%
642 hp
696 hp		323/225
69.66%
721 hp		---258.7/172.5
66.69%
0.950
Brodix BB-3370/-2.350/1.880119-145/93
64.14%		206/129
62.62%		265/161
60.75%
545 hp		316/187
59.18%
650 hp		351/213
60.68%
722 hp
783 hp		371/229
61.73%
828 hp		---275.7/168.7
61.19%
1.003
Brodix BB-4340/-2.350/1.880134-151/132
87.42%		211/161
76.30%		261/188
72.03%
537 hp		303/216
71.29%
623 hp		334/236
70.66%
687 hp
745 hp		361/252
69.81%
806 hp		---270.2/197.5
73.10%
1.062
Brodix BB-5 Sonny's390/-2.350/1.900108-111/74
66.67%		163/116
71.17%		219/153
69.86%
451 hp		276/187
67.75%
568 hp		321/213
66.36%
660 hp
716 hp		360/233
64.72%
803 hp		---241.7/162.7
67.31%
0.923
Brodix BB-5 Sonny's Sportsman395/123-113.5-------394/275
69.80%
989 hp		--N/A
N/A
0.997/2.236
Brodix BB-5 Sonny's Max Flow406/149-113.5-------421/311
73.87%
1057 hp		--N/A
N/A
1.037/2.087
Brodix Big Duke - PB 1800 18 Deg415/-2.400/1.90089-141/126
89.36%		200/166
83.00%		263/200
76.05%
541 hp		322/225
69.88%
662 hp		370/242
65.41%
761 hp
826 hp		407/253
62.16%
908 hp		418/257
61.48%
1049 hp		--303.0/209.9
69.26%
1.007
Brodix Big Duke - PB 1800 18 Deg PortedN/A2.400/1.90089-165/126
76.36%		242/180
74.38%		318/236
74.21%
654 hp		388/296
76.29%
798 hp		430/313
72.79%
885 hp
960 hp		463/319
68.90%
1033 hp		483/338
69.98%
1212 hp		--355.6/258.3
72.64%
Brodix Big Duke - PB 1801 18 Deg PortedN/A2.400/1.90089-162/129
79.63%		245/180
73.47%		312/222
71.15%
642 hp		367/269
73.30%
755 hp		411/301
73.24%
845 hp
917 hp		442/308
69.68%
987 hp		463/315
68.03%
1162 hp		--343.1/246.3
71.77%
Brodix Big Duke - PB 1802 18 Deg456/-2.400/1.90091-146/112
76.71%		216/159
73.61%		289/199
68.86%
595 hp		359/233
64.90%
739 hp		417/266
63.79%
858 hp
931 hp		454/287
63.22%
1013 hp		478/300
62.76%
1200 hp		495/308
62.22%
1242 hp		-356.8/233.0
65.31%
1.086
Brodix Big Duke - PB 1803 18 Deg Ported M2410/-2.450/1.86095-138/116
84.06%		218/164
75.23%		300/204
68.00%
617 hp		364/235
64.56%
749 hp		420/266
63.33%
864 hp
937 hp		460/294
63.91%
1027 hp		489/323
66.05%
1227 hp		505/343
67.92%
1267 hp		-361.8/243.1
67.21%
1.232
Brodix / Sonny's PB 2005 14.5 Deg490/-2.520/1.86080-129/111
86.05%		199/156
78.39%		287/196
68.29%
590 hp		334/231
69.16%
687 hp		431/258
59.86%
887 hp
962 hp		482/274
56.85%
1076 hp		517/287
55.51%
1298 hp		540/293
54.26%
1355 hp		-364.9/225.8
61.87%
1.102
Brodix / Sonny's PB 2005 14.5 Deg PortedN/A2.520/1.86080-153/132
86.27%		241/187
77.59%		323/227
70.28%
664 hp		395/258
65.32%
813 hp		452/289
63.94%
930 hp
1009 hp		499/326
65.33%
1114 hp		517/338
65.38%
1298 hp		540/343
63.52%
1355 hp		-390.0/262.5
67.31%
Brodix EB 650N/A-N/A105/88
83.81%		181/130
71.82%		255/173
67.84%		330/214
64.85%
679 hp		395/268
67.85%
813 hp		450/307
68.22%
926 hp
1004 hp		482/335
69.50%
1076 hp		498/344
69.08%
1250 hp		--337.0/232.4
68.95%
Canfield 305 Alum CHP305/-2.250/1.880
4.250
Pipe		11475/61
81.33%		161/115
71.43%		215/163
75.81%		257/199
77.43%
529 hp		303/228
75.25%
623 hp		328/251
76.52%
675 hp
732 hp		339/265
78.17%
757 hp		332/273
82.23%
833 hp		--251.3/194.4
77.36%
1.111
Canfield 310 Alum310/-2.250/1.880113/119/12572/74
102.7%		138/123
89.13%		204/176
86.27%		266/205
77.07%
547 hp		318/237
74.53%
654 hp		347/260
74.93%
714 hp
774 hp		353/273
77.34%
788 hp		355/284
80.00%
891 hp		--256.6/204.0
79.49%
1.145
Canfield 350 Alum350/-2.300/1.880113/119/12582/74
90.24%		176/123
69.89%		250/175
70.00%		313/213
68.05%
644 hp		350/256
73.14%
720 hp		367/284
77.38%
755 hp
819 hp		376/309
82.18%
839 hp		380/320
84.21%
954 hp		--286.8/219.3
76.46%
1.086
DART N.E. Mod. Oval Full Port307-311/1452.250/1.880
4.440
No Pipe		117-153-156/122223-224/163281-284/218314-330/260340-362/274356-370/283364-374/293---
DART 265 Oval Super Mod. Alum275/1282.300/1.880
4.500
No Pipe		N/A-156/132
84.62%		216/169
78.24%		274/203
74.09%
564 hp		310/230
74.19%
638 hp		324/247
76.23%
667 hp
723 hp		329/255
77.51%
734 hp		---268.2/206.0
76.82%
1.196/1.992
DART 265 CNC Oval Super Mod. Alum298/1432.300/1.880
4.500
No Pipe		N/A-157/142
90.45%		222/190
85.59%		274/230
83.94%
564 hp		309/263
85.11%
636 hp		365/284
77.81%
751 hp
815 hp		380/294
77.37%
848 hp		---284.5/233.8
82.19%
1.275/2.056
DART 308 Super Mod.316/1282.250/1.880
4.500
No Pipe		N/A-153/132
86.27%		221/169
76.47%		275/203
73.82%
566 hp		318/230
72.33%
654 hp		348/247
70.98%
716 hp
777 hp		367/255
69.48%
819 hp		---280.3/206.0
73.48%
1.161/1.992
DART 320 Super Mod.327/1282.300/1.880
4.500
No Pipe		N/A-152/132
86.84%		216/169
78.24%		274/203
74.09%
564 hp		316/230
72.78%
650 hp		338/247
73.08%
695 hp
754 hp		351/255
72.65%
783 hp		---274.5/206.0
75.05%
1.073/1.992
DART 320 CNC Super Mod.346/1432.300/1.880
4.500
No Pipe		119.1-157/142
90.45%		221/190
85.97%		280/230
82.14%
576 hp		326/263
80.67%
671 hp		365/284
77.81%
751 hp
815 hp		370/294
79.46%
826 hp		---286.5/233.8
81.62%
1.069/2.056
DART 360 Super Mod. Alum366/1282.300/1.880
4.500
No Pipe		N/A-154/132
85.71%		220/169
76.82%		279/203
72.76%
574 hp		321/230
71.65%
660 hp		346/247
71.39%
712 hp
772 hp		370/255
68.92%
826 hp		---281.7/206.0
73.14%
1.011/1.992
DART 360 CNC Super Mod. Alum389/1432.300/1.880
4.500
No Pipe		N/A-157/142
90.45%		223/190
85.20%		284/230
80.99%
584 hp		337/263
78.04%
693 hp		374/284
75.94%
769 hp
835 hp		393/294
74.81%
877 hp		---294.7/233.8
79.36%
1.010/2.056
DART 370 CNC Oval Full Port370/1522.300/1.880
4.500
No Pipe		125-176-175/135243-238/187305-302/231348-350/280381-385/292403-411/310410-420/319---
DART PRO1 310 Alum310/-2.250/1.880
4.500
No Pipe		N/A-147/137
93.20%		219/175
79.91%		275/210
76.36%
566 hp		318/233
73.27%
654 hp		347/249
71.76%
714 hp
774 hp		364/258
70.88%
812 hp		369/266
72.09%
926 hp		--291.3/218.3
74.94%
1.190
DART PRO1 325 Alum325/-2.250/1.880
4.500
No Pipe		N/A-147/137
93.20%		223/175
78.48%		281/210
74.73%
578 hp		326/233
71.47%
671 hp		353/249
70.54%
726 hp
788 hp		371/258
69.54%
828 hp		376/266
70.74%
944 hp		--296.7/218.3
73.57%
1.157
DART PRO1 335 CNC AlumN/A2.300/1.880
4.500
No Pipe		N/A-174/136
78.16%		245/178
72.65%		306/235
76.80%
629 hp		353/265
75.07%
726 hp		383/282
73.63%
788 hp
855 hp		401/296
73.82%
895 hp		406/303
74.63%
1019 hp		--324.0/242.1
74.74%
DART PRO1 345 Alum345/-2.300/1.880
4.500
No Pipe		N/A--214/175
81.78%		272/210
77.21%
560 hp		321/233
72.59%
660 hp		359/249
69.36%
739 hp
801 hp		384/258
67.19%
857 hp		397/266
67.00%
996 hp		--324.5/231.8
71.44%
1.151
DART PRO1 355 CNC AlumN/A2.300/1.880
4.500
No Pipe		N/A-177/136
76.84%		251/178
70.92%		310/235
75.81%
638 hp		360/265
73.61%
741 hp		399/282
70.68%
821 hp
891 hp		423/296
69.98%
944 hp		426/303
71.13%
1069 hp		--335.1/242.1
72.25%
DART Big M Super Mod. Ported Alum411/1472.350/1.880
4.600
No Pipe		N/A-160/124
77.50%		223/159
71.30%		285/196
68.77%
586 hp		336/243
72.32%
691 hp		377/268
71.09%
776 hp
841 hp		401/283
70.57%
895 hp		415/295
71.08%
1042 hp		--313.9/224.0
71.37%
1.010/2.007
DART Big M Super Mod. Ported Full Polish Alum411/1472.350/1.880
4.600
No Pipe		N/A-161/124
77.02%		235/159
67.66%		302/196
64.90%
621 hp		357/243
68.07%
734 hp		394/268
68.02%
811 hp
879 hp		418/283
67.70%
933 hp		429/295
68.76%
1077 hp		--328.0/224.0
68.29%
1.044/2.007
DART Big Chief 18 Degree PRO1 Alum424/1852.400/1.900
-
No Pipe		N/A-158/138
87.34%		222/185
83.33%		284/229
80.63%
584 hp		345/267
77.39%
710 hp		390/293
75.13%
802 hp
870 hp		420/30
7.147%
937 hp		431/305
70.77%
1082 hp		437/309
70.71%
1097 hp		-335.9/219.5
65.35%
1.031/1.670
DART Late Big Chief 18 Degree CNC Super Mod. Alum402/1752.400/1.900
4.600
No Pipe		N/A-158/154
97.47%		234/211
90.17%		302/266
88.08%
621 hp		365/282
77.26%
751 hp		407/293
71.99%
837 hp
908 hp		432/297
68.75%
964 hp		444/301
67.79%
1114 hp		--334.6/257.7
77.03%
1.104/1.720
DART Late Big Chief 18 Degree Full Port Alum421/1862.400/1.900
4.600
No Pipe		N/A-165/141
85.45%		239/191
79.92%		294/237
80.61%
605 hp		356/280
78.65%
732 hp		410/315
76.83%
843 hp
915 hp		445/333
74.83%
993 hp		461/339
73.54%
1157 hp		469/351
74.84%
1177 hp		-354.9/273.4
77.03%
1.114/1.887
DART 18 Degree CNC Full Alum424/185-
-
No Pipe		95--------492/343
69.72%
1235 hp		-N/A
N/A
1.160/1.854
DART PRO1 18 Degree CNC Bowls Alum421/--
-
No Pipe		N/A--------470/340
72.34%
1180 hp		-N/A
N/A
1.116
DART 14 Degree Olds Full Port Alum - CFE440/-2.400/1.900N/A--245/204
83.27%		326/264
80.98%
671 hp		376/312
82.98%
773 hp		425/327
76.94%
874 hp
949 hp		457/330
72.21%
1020 hp		474/340
71.73%
1190 hp		475/341
71.79%
1192 hp		-396.9/302.6
76.24%
1.080
DART 14 Degree Olds Full Port Alum440/-2.400/1.900
-
No Pipe		N/A--237/192
81.01%		303/247
81.52%
623 hp		361/297
82.27%
743 hp		412/317
76.94%
848 hp
920 hp		447/331
74.05%
998 hp		457/341
74.62%
1147 hp		463/345
74.51%
1162 hp		-382.9/295.7
77.24%
1.052
DART Big Chief 14 Degree Oval Full Port Alum433/2002.470/1.800
-
No Pipe		N/A-164/129
78.66%		254/182
71.65%		333/218
65.47%
685 hp		398/251
63.07%
819 hp		446/288
64.57%
917 hp
995 hp		482/316
65.56%
1076 hp		493/338
68.56%
1237 hp		495/349
70.51%
1242 hp		-383.1/258.9
67.57%
1.143/1.745
DART 14 Degree Oval CNC Full Alum433/--
-
No Pipe		N/A--------515/365
70.87%
1293 hp		-N/A
N/A
1.189
DART 11 Degree Big Chief II Oval Full Port Alum512/1852.470/1.800
-
No Pipe		N/A-168/137
81.55%		261/198
75.86%		337/256
75.96%
693 hp		404/301
74.50%
831 hp		459/327
71.24%
944 hp
1024 hp		498/336
67.47%
1111 hp		516/341
66.09%
1295 hp		518/342
66.02%
1300 hp		528/-
1325 hp		409.9/279.8
N/A
1.031/1.849
DART 11 Degree Oval CNC Full Alum512/--
-
No Pipe		N/A--------545/360
66.06%
1368 hp		-N/A
N/A
1.064
Edelbrock/Chapman #60409, #60419 Rect. Ported Alum320/1182.250/1.900
-
No Pipe		11286/64
74.42%		163/121
74.23%		244/169
69.26%		296/206
69.59%
609 hp		323/236
73.07%
664 hp		332/258
77.71%
683 hp
741 hp		341/276
80.94%
761 hp		---255.0/190.0
74.51%
1.066/2.339
Edelbrock/Chapman #60429, #60439 Oval Ported Alum295/1182.250/1.900
-
No Pipe		11286/64
74.42%		160/121
75.63%		236/169
71.61%		285/206
72.28%
586 hp		307/236
76.87%
632 hp		312/258
82.69%
642 hp
696 hp		315/276
87.62%
703 hp		---243.0/190.0
78.19%
1.068/2.339
Edelbrock #60459, #60479, #60499, #61459 Performer RPM 454-O Alum290/1102.190/1.880110/11274/71
95.95%		143/128
89.51%		207/153
73.91%		250/178
71.20%
514 hp		284/200
70.42%
584 hp		309-299/218----191.6/146.0
76.20%
0.979/1.818
Edelbrock #60559, #61559 Performer RPM 454-R Alum315/1102.190/1.88011876/70
92.11%		146/132
90.41%		210/156
74.29%		255/181
70.98%
525 hp		294-284/207314-297/228----171.8/134.8
78.46%
0.810/1.645
Edelbrock/Chapman #77659 Rect. Ported Alum372/-2.300/1.900
-
No Pipe		13085/62
72.94%		156/135
86.54%		229/198
86.46%		287/242
84.32%
590 hp		328/278
84.76%
675 hp		362/300
82.87%
745 hp
808 hp		380/312
82.11%
848 hp		---261.0/218.1
83.58%
1.022
HRD Dart 360 Ported365/-2.300/1.880N/A-157/132
84.08%		235/177
75.32%		288/225
78.13%
592 hp		341/270
79.18%
701 hp		386/302
78.24%
794 hp
862 hp		412/321
77.91%
920 hp		424/328
77.36%
1064 hp		430/333
77.44%
1079 hp		-334.1/261.0
78.11%
1.178
HRD Dart Big Chief455/-2.450/1.860N/A-167/139
83.23%		260/197
75.77%		331/246
74.32%
681 hp		411/288
70.07%
845 hp		475/339
71.37%
977 hp
1060 hp		530/353
66.60%
1183 hp		550/366
66.55%
1380 hp		556/372
66.91%
1395 hp		-410.0/287.5
70.12%
1.222
Holley Avenger Alum CHP314/A2.250/1.880
4.250
Pipe		11971/60
84.51%		137/122
89.05%		199/171
85.93%		251/207
82.47%
516 hp		292/233
79.79%
601 hp		315/252
80.00%
648 hp
703 hp		330/264
80.00%
737 hp		340/269
79.12%
853 hp		--241.9/197.3
81.55%
1.083
Pro-FilerP/N 174-29 24 Deg BBC290/--119-148/129
87.16%		213/162
76.06%		276/198
71.74%
568 hp		-327/250
76.45%
673 hp
730 hp		338/261
77.22%
754 hp		350/264
75.43%
878 hp		--275.3/210.7
76.51%
1.207
Pro-FilerP/N 174-32 24 Deg BBC320/--119-164/129
78.66%		228/162
71.05%		288/198
68.75%
592 hp		-379/250
65.96%
780 hp
846 hp		395/261
66.08%
882 hp		392/264
67.35%
984 hp		--307.7/210.7
68.47%
1.234
Pro-FilerP/N 174-35 24 Deg BBC350/--119-165/129
78.18%		230/162
70.43%		290/198
68.28%
597 hp		-380/250
65.79%
782 hp
848 hp		400/261
65.25%
893 hp		412/264
64.08%
1034 hp		--312.8/210.7
67.34%
1.177
Pro-FilerP/N 184 12 Deg BBC470/-2.385/1.88060-160/137
85.63%		239/182
76.15%		314/226
71.97%
646 hp		384/275
71.61%
790 hp		431/298
69.14%
887 hp
962 hp		458/306
66.81%
1022 hp		483/310
64.18%
1212 hp		497/320
64.39%
1247 hp		-370.8/256.8
69.25%
1.057
Reher-Morrison Dart 360375/-2.300/1.880N/A-------415/-
1042 hp		--N/A
N/A
1.107
Reher-Morrison 14 Deg467/-2.450/1.850N/A-------520/-
1305 hp		--N/A
N/A
1.113
Reher-Morrison 14 Deg476/-2.450/1.850N/A-------510/-
1280 hp		-520/-
1305 hp		515.0
N/A
1.092
Reher-Morrison 18 Deg476/-2.400/1.900N/A-------490/-
1230 hp		505/-
1267 hp		520/-
1305 hp		505.0
N/A
1.092
Sonny's Dart 360 PortedN/A-N/A-------413/297
71.91%
1037 hp		---
Sonny's 14.5 Deg Cast Ported490/--N/A-------515/-
1293 hp		--N/A
N/A
1.051
Sonny's 14.5 Deg Cast Ported Lt CNC493/175-N/A--------537/320
59.59%
1348 hp		-N/A
N/A
1.089/1.829
Sonny's 14.5 Deg548/2042.520/1.860
4.625		73-77--------555/378
68.11%
1393 hp		-N/A
N/A
1.013/1.853
Sonny's 14.5 Deg Pontiac548/2042.480/1.920
4.600		76--------548/378
68.98%
1375 hp		-N/A
N/A
1.000/1.853
Sonny's HemiN/A-N/A---------590/390
66.10%
1481 hp		-
Sonny's Symmetrical574/2212.520/1.900
4.670		84------536/366
68.28%
1196 hp		556/381
68.53%
1395 hp		--546.0/373.5
68.41%
0.969/1.724
Sonny's Symmetrical574/2362.550/1.930
4.750		74-75--------580/407
70.17%
1456 hp		-N/A
N/A
1.010/1.725
Steve Schmidt 12 DegN/A2.400/1.880N/A--------518/376
72.59%
1300 hp		518/376
72.59%
1300 hp		518.0/376.0
72.59%
Steve Schmidt 12 Deg NitrousN/A-N/A---------525/412
78.48%
1318 hp		-
Steve Schmidt 24 Deg336/-2.300/1.880N/A--------415/303
73.01%
1042 hp		-N/A
N/A
1.235
World Oval Port Iron CHP260/-2.250/1.88011971/50
70.42%		145/105
72.41%		205/146
71.22%		243/173
71.19%
500 hp		267/190
71.16%
549 hp		280/203
72.50%
576 hp
625 hp		282/209
74.11%
629 hp		283/214
75.62%
710 hp		--222.0/161.3
72.64%
1.088
World 02003Al310/-2.250/1.880116---276/179
64.86%
568 hp		308/192
62.34%
634 hp		317/198
62.46%
652 hp
708 hp		321/201
62.62%
716 hp		---305.5/192.5
63.01%
1.035
World 03003CI310/-2.250/1.880N/A---273/182
66.67%
562 hp		308/195
63.31%
634 hp		321/201
62.62%
660 hp
716 hp		326/206
63.19%
728 hp		---307.0/196.0
63.84%
1.052


Chrysler
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 Average
Intake / Exhaust
Chrysler 2.0 NEON DOHCN/A-N/A92/88
95.65%		173/151
87.28%		232/166
71.55%		252/170
67.46%
259.2 hp		257/171
66.54%
264.3 hp		---201.2/149.2
74.16%
Chrysler 2.2 #445N/A-N/A53/39
73.58%		103/75
72.82%		140/97
69.29%		156/113
72.44%
160.5 hp		165/123
74.55%
169.7 hp		---123.4/89.45
72.45%
Chrysler Viper '97214/70-7361/54
88.52%		118/115
97.46%		167/155
92.81%		203/180
88.67%
522 hp		229/185
80.79%
589 hp		242/187
77.27%
622 hp
675 hp		--170.0/146.0
85.88%
1.131/2.671
Chrysler Viper Ported CaldwellN/A-N/A61/59
96.72%		125/116
92.80%		178/170
95.51%		214/204
95.33%
550 hp		247/210
85.02%
635 hp		270/214
79.26%
694 hp
753 hp		--182.5/162.2
88.86%
Chrysler Viper BTR Perf Stage IIN/A2.020/1.600N/A-122/124
101.6%		174/163
93.68%		221/195
88.24%
568 hp		259/204
78.76%
666 hp		276/211
76.45%
710 hp
770 hp		--210.4/179.4
85.27%
Chrysler Poly Pocket PortedN/A1.845/1.565N/A----228/160
70.18%
469 hp		----
LA
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 Average
Intake / Exhaust
Chrysler 051 Iron MMM158/66-N/A50/49
98.00%		113/97
85.84%		165/123
74.55%		188/133
70.74%
387 hp		193/137
70.98%
397 hp		189/137
72.49%
389 hp
422 hp		--149.7/112.7
75.28%
1.222/2.076
Chrysler 915J Iron HPMMN/A-N/A66/63
95.45%		123/110
89.43%		170/135
79.41%		206/145
70.39%
424 hp		220/148
67.27%
453 hp		216/148
68.52%
444 hp
482 hp		--166.8/124.8
74.83%
Chrysler 340 std. Iron160/702.020/1.60064-----189/142
75.13%
389 hp
422 hp		--N/A
N/A
1.181/2.029
Chrysler 340 X 894 Iron MMMN/A-N/A58/45
77.59%		125/95
76.00%		172/122
70.93%		208/135
64.90%
428 hp		221/140
63.35%
455 hp		210/142
67.62%
432 hp
469 hp		--165.7/113.2
68.31%
Chrysler 340 #587 Iron160/701.880/1.60063.3----214/136
63.55%
440 hp		213/142
66.67%
438 hp
475 hp		--213.5/139.0
65.11%
1.338/2.029
Chrysler 340 #587 Iron CCM160/70-63.352/46
88.46%		107/87
81.31%		162/112
69.14%		195/121
62.05%
401 hp		191/124
64.92%
393 hp		192/126
65.63%
395 hp
429 hp		--149.8/102.7
68.52%
1.219/1.800
Chrysler 340 #587 Ported Iron HPMMN/A-N/A63/57
90.48%		126/95
75.40%		181/132
72.93%		230/138
60.00%
473 hp		253/160
63.24%
520 hp		241/179
74.27%
496 hp
538 hp		--182.3/126.8
69.56%
Chrysler 360 #308 Iron160/681.880/1.60065---201/142
70.65%
413 hp		209/147
70.33%
430 hp		204/147
72.06%
420 hp
455 hp		--204.7/145.3
71.01%
1.306/2.162
Chrysler 360 #308 - Hughes Stage I ported Iron172/--N/A----245/-
504 hp		---N/A
N/A
1.424
Chrysler 360 #308 - Hughes Stage II ported Iron195/--N/A-----265/-
545 hp
591 hp		--N/A
N/A
1.359
Chrysler 360 #137 Magnum CCM153/--6060/54
90.00%		118/99
83.90%		165/131
79.39%		195/137
70.26%
401 hp		209/138
66.03%
430 hp		205/138
67.32%
422 hp
458 hp		--158.7/116.2
73.21%
1.366
Chrysler 360 #576 High Swirl CCM160/68-7062/55
88.71%		112/99
88.39%		160/119
74.38%		182/126
69.23%
374 hp		192/128
66.67%
395 hp		187/130
69.52%
385 hp
417 hp		--149.2/109.5
73.41%
1.200/1.912
Chrysler 360 #596 '78 Iron CCM158/66-65.553/48
90.57%		107/89
83.18%		159/114
71.70%		185/121
65.41%
381 hp		199/123
61.81%
409 hp		193/124
64.25%
397 hp
431 hp		--149.3/103.2
69.08%
1.259/1.879
Chrysler #140 Magnum R/T CCM180/71-6070/62
88.57%		137/111
81.02%		181/142
78.45%		209/163
77.99%
430 hp		211/168
79.62%
434 hp		211/171
81.04%
434 hp
471 hp		--169.8/136.2
80.18%
1.172/2.408
Chrysler W2 IronN/A2.020/1.600N/A63/57
90.48%		121/105
86.78%		169/132
78.11%		211/144
68.25%
434 hp		238/148
62.18%
490 hp		242/150
61.98%
498 hp
540 hp		--174.0/122.7
70.50%
Chrysler W2 IronHPMMN/A2.020/1.600N/A--173/141
81.50%		215/148
68.84%
442 hp		244/151
61.89%
502 hp		254/151
59.45%
523 hp
567 hp		--221.5/147.8
66.70%
Chrysler W2 Ported IronN/A2.020/1.600N/A------315/230
73.02%
703 hp		--
Dodge P-7 Ported Chapman327/-2.180/1.610
-
No Pipe		49.5-139/112
80.58%		225/161
71.56%		300/211
70.33%
617 hp		359/247
68.80%
739 hp		376/258
68.62%
773 hp
839 hp		379/267
70.45%
846 hp		381/271
71.13%
956 hp		308.4/218.1
70.73%
1.165
Dodge P-7 Ported HRDN/A2.160/1.620N/A-133/124
93.23%		233/179
76.82%		313/227
72.52%
644 hp		347/254
73.20%
714 hp		380/267
70.26%
782 hp
848 hp		394/276
70.05%
879 hp		403/281
69.73%
1011 hp		314.7/229.7
72.99%
Chrysler W8 Ported Chapman269/-2.180/1.625
-
No Pipe		5971/56
78.87%		153/110
71.90%		224/176
78.57%		284/216
76.06%
584 hp		327/223
68.20%
673 hp		343/243
70.85%
706 hp
766 hp		352/252
71.59%
786 hp		-250.6/182.3
72.75%
1.309
Chrysler W8 Ported by M2272/-2.180/1.600
4.125		48--236/165
69.92%		297/218
73.40%
611 hp		340/244
71.76%
699 hp		361/255
70.64%
743 hp
806 hp		373/262
70.24%
833 hp		373/267
71.58%
936 hp		330.0/235.2
71.26%
1.371
Chrysler W9 Ported Chapman268/-2.200/1.625
-
No Pipe		6468/52
76.47%		151/112
74.17%		230/181
78.70%		294/220
74.83%
605 hp		338/239
70.71%
695 hp		347/243
70.03%
714 hp
774 hp		350/250
71.43%
781 hp		-254.0/185.3
72.95%
1.306
Brodix B1 BA195/-2.080/1.60065-129/119
92.25%		180/160
88.89%		221/182
82.35%
455 hp		249/190
76.31%
512 hp		263/195
74.14%
541 hp
587 hp		269/198
73.61%
600 hp		-218.5/174.0
79.63%
1.379
Edelbrock #60179, #60779 Alum171/772.020/1.60063/6569/64
92.75%		129/108
83.72%		188/142
75.53%		232/171
73.71%
477 hp		249/183
73.49%
512 hp		251/190
75.70%
516 hp
560 hp		--186.3/143.0
76.74%
1.468/2.468
Edelbrock #61779 Alum176/752.020/1.6005862/52
83.87%		119/105
88.24%		175/142
81.14%		225/169
75.11%
463 hp		251/185
73.71%
516 hp		260/190
73.08%
535 hp
580 hp		--182.0/140.5
77.20%
1.477/2.533
Indy 360-1210/852.100/1.650N/A-102/79
77.45%		147/112
76.19%		200/145
72.50%
411 hp		252/170
67.46%
518 hp		278/183
65.83%
572 hp
620 hp		280/189
67.50%
625 hp		-209.8/146.3
69.74%
1.333/2.224
Indy 360-1 Full PortingN/A2.100/1.650N/A-135/115
85.19%		202/155
76.73%		259/185
71.43%
533 hp		295/206
69.83%
607 hp		325/219
67.38%
669 hp
725 hp		339/226
66.67%
757 hp		-259.2/184.3
71.13%
Indy 360-2180/852.100/1.650N/A-83/79
95.18%		138/112
81.16%		186/145
77.96%
383 hp		230/170
73.91%
473 hp		249/183
73.49%
512 hp
556 hp		252/189
75.00%
562 hp		-189.7/146.3
77.15%
1.400/2.224
Indy 360-2 Full PortingN/A2.100/1.650N/A-146/107
73.29%		209/145
69.38%		259/183
70.66%
533 hp		295/202
68.47%
607 hp		310/215
69.35%
638 hp
692 hp		317/220
69.40%
708 hp		-256.0/178.7
69.79%
Shanons Engineering 360 Full PortingN/A2.190/1.650N/A------338/226
66.86%
754 hp		--
RB
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 Average
Intake / Exhaust
Chrysler #452 Iron200/622.080/1.740N/A-142/-208/-244/-
502 hp		264/-
543 hp		---214.5
N/A
1.320
Chrysler #452 Iron200/622.080/1.740N/A--/103-/132-/143-/146-/148---
Chrysler #518 Iron233/77-N/A-159/-222/-262/-
539 hp		284/-
584 hp		295/-
607 hp
658 hp		300/-
670 hp		-253.7
N/A
1.288
Chrysler #906 Iron200/622.080/1.74080-142/-208/-241/-
496 hp		262/-
539 hp		270/-
555 hp
603 hp		--224.6
N/A
1.350
Chrysler #906 Iron200/622.080/1.740N/A--/98-/127-/143-/150-/154---
Chrysler Stage IVN/A2.080/1.750N/A-----248/177
71.37%
510 hp
554 hp		---
Chrysler Stage VI Ported Chapman235/-2.180/1.810
-
No Pipe		7772/55
76.39%		157/112
71.34%		233/177
75.97%		284/211
74.30%
584 hp		323/233
72.14%
664 hp		343/242
70.55%
706 hp
766 hp		343/252
73.47%
766 hp		-250.7/183.1
73.05%
1.460
Chrysler Stage VI Ported Chapman260/-2.200/1.810
-
No Pipe		7771/55
77.46%		157/112
71.34%		230/177
76.96%		290/211
72.76%
597 hp		325/233
71.69%
669 hp		351/242
68.95%
722 hp
783 hp		351/252
71.79%
783 hp		-253.6/183.1
72.23%
1.350
Chrysler Stage VI Ported Chapman Max Wedge285/-2.250/1.810
-
No Pipe		7477/55
71.43%		151/112
74.17%		220/177
80.45%		283/211
74.56%
582 hp		330/233
70.61%
679 hp		364/242
66.48%
749 hp
812 hp		375/252
67.20%
837 hp		-257.1/183.1
71.22%
1.316
Brodix B1300/-2.300/1.78068-151/116
76.82%		220/174
79.09%		277/216
77.98%
570 hp		325/227
69.85%
669 hp		364/227
62.36%
749 hp
812 hp		396/227
57.32%
884 hp		-288.8/197.8
68.49%
1.320
Brodix B1 BS230/-2.200/1.81065-133/103
77.44%		184/132
71.74%		227/156
68.72%
467 hp		262/175
66.79%
539 hp		278/195
70.14%
572 hp
620 hp		293/201
68.60%
654 hp		-229.5/160.3
69.86%
1.274
Bulldog Performance Stock IntakeN/A2.190/1.8107678/67
85.90%		146/126
86.30%		211/170
80.57%		260/195
75.00%
535 hp		297/213
71.72%
611 hp		293/226
77.13%
603 hp
654 hp		294/236
80.27%
656 hp		-225.6/176.1
78.09%
Bulldog Performance Max Wedge IntakeN/A2.190/1.8107674/67
90.54%		147/126
85.71%		213/170
79.81%		257/195
75.88%
529 hp		307/213
69.38%
632 hp		308/226
73.38%
634 hp
687 hp		307/236
76.87%
685 hp		-230.4/176.1
76.44%
Edelbrock #6091 AlumN/A2.140/1.8108479/70
88.61%		145/126
86.90%		209/160
76.56%		254/188
74.02%
523 hp		278/206
74.10%
572 hp		290/217
74.83%
597 hp
647 hp		292/223
76.37%
652 hp		-221.0/170.0
76.92%
Edelbrock #60929 Alum210/702.140/1.8108479/70
88.61%		145/126
86.90%		209/160
76.56%		254/188
74.02%
523 hp		278/206
74.10%
572 hp		290/217
74.83%
597 hp
647 hp		292/223
76.37%
652 hp		-221.0/170.0
76.92%
1.390/3.186
Indy 440 Torquer260/--75-----298/218
73.15%
613 hp
665 hp		--N/A
N/A
1.146
Indy 440-SR265/1062.190/1.81075-143/101
70.63%		194/135
69.59%		238/164
68.91%
490 hp		272/189
69.49%
560 hp		290/204
70.34%
597 hp
647 hp		296/217
73.31%
661 hp		-238.8/168.3
70.48%
1.117/2.047
Indy 440-SR Full PortingN/A2.190/1.810N/A-150/118
78.67%		216/166
76.85%		265/205
77.36%
545 hp		310/238
76.77%
638 hp		337/254
75.37%
693 hp
752 hp		352/263
74.72%
786 hp		-271.7/207.3
76.32%
Indy 440-SR
ported by M2 / Slawko		280/-2.190/1.810
4.500		83--217/165
76.04%		275/199
72.36%
566 hp		317/219
69.09%
652 hp		336/243
72.32%
691 hp
750 hp		349/257
73.64%
779 hp		357/265
74.23%
896 hp		308.5/224.7
72.83%
1.275
Indy 440-1 Al-C310/1102.190/1.81075-152/101
66.45%		203/135
66.50%		254/164
64.57%
523 hp		288/189
65.63%
592 hp		296/204
68.92%
609 hp
661 hp		312/217
69.55%
696 hp		-250.8/168.3
67.11%
1.006/1.973
Indy 440-1 Full Porting325/-2.190/1.810N/A-161/132
81.99%		223/177
79.37%		280/218
77.86%
576 hp		327/248
75.84%
673 hp		359/267
74.37%
739 hp
801 hp		373/279
74.80%
833 hp		-287.2/220.2
76.67%
1.148
Indy 572-13 Full Porting335/1182.300/1.88079-211/163
77.25%		274/208
75.91%		332/243
73.19%
683 hp		372/272
73.12%
765 hp		398/292
73.37%
819 hp
888 hp		421/304
72.21%
940 hp		-334.7/247.0
73.80%
1.257/2.576
Indy 600-13410/1342.400/1.94070-209/151
72.25%		263/173
65.78%		313/186
59.42%
644 hp		338/192
56.80%
695 hp		356/195
54.78%
732 hp
795 hp		356/195
54.78%
795 hp		-305.8/182.0
59.51%
0.868/1.455
Indy 600-13 Full Porting425/-2.400/1.94070--278/221
79.50%		338/265
78.40%
695 hp		387/293
75.71%
796 hp		425/309
72.71%
874 hp
949 hp		451/315
69.84%
1007 hp		470/330
70.21%
1180 hp		391.5/288.8
73.78%
1.106
Koffel B1N/A2.300/1.775N/A------400/290
72.50%
893 hp		--
Koffel B1N/A2.400/-N/A------450/300
66.67%
1004 hp		--
World Torquer 440 Alum260/1062.190/1.81075---------
World Pro 440 Alum310/1102.190/1.81075---------
HEMI
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 Average
Intake / Exhaust
New Hemi 5.7lN/A2.000/1.550N/A65/-144/-214/-250/-
514 hp		262/-
539 hp		265/161
60.75%
545 hp
591 hp		268/-
598 hp		-209.7
New Hemi 5.7l PortedN/AN/AN/A68/-144/-222/-270/-
555 hp		293/-
603 hp		300/195
65.00%
617 hp
670 hp		304/-
679 hp		310/-
778 hp		238.9
Chrysler Std. Hemi IronN/A2.250/1.940168-----355/213
60.00%
730 hp
792 hp		---
Chrysler Std. Hemi Barton SSN/A-168-----400/270
67.50%
823 hp
893 hp		---
Chrysler Alum Hemi Barton portedN/A2.250/1.940N/A78/65
83.33%		167/138
82.63%		253/195
77.08%		319/241
75.55%
656 hp		373/275
73.73%
767 hp		423/281
66.43%
870 hp
944 hp		441/293
66.44%
984 hp		441/293
66.44%
1107 hp		311.9/222.6
71.38%
Chrysler Std. Hemi Mullin ported AlumN/A-N/A------390/-
870 hp		--
Chrysler D-5 Hemi AlumN/A2.300/1.940N/A-----367/237
64.58%
755 hp
819 hp		---
Chrysler Early HemiN/A-N/A-121/97
80.17%		178/128
71.91%		212/145
68.40%
436 hp		225/159
70.67%
463 hp		233/160
68.67%
479 hp
520 hp		--193.8/137.8
71.10%
Hot Heads Early HemiN/A-N/A-125/121
96.80%		191/159
83.25%		241/176
73.03%
496 hp		259/185
71.43%
533 hp		274/191
69.71%
564 hp
612 hp		--218.0/166.4
76.33%
Hot Heads Early Hemi Street PortN/A-N/A-125/129
103.2%		200/171
85.50%		261/185
70.88%
537 hp		287/205
71.43%
590 hp		313/211
67.41%
644 hp
699 hp		--237.2/180.2
75.97%
Hot Heads Early Hemi Race PortN/A-N/A-157/150
95.54%		237/192
81.01%		303/220
72.61%
623 hp		341/250
73.31%
701 hp		367/259
70.57%
755 hp
819 hp		--281.0/214.2
76.23%
Hot Heads Early Hemi Race Port MaxN/A-N/A------416/-
928 hp		--
Indy 426-1243/1032.250/1.940170--147/137
93.20%		212/173
81.60%
436 hp		274/191
69.71%
564 hp		320/195
60.94%
658 hp
714 hp		338/198
58.58%
754 hp		351/198
56.41%
881 hp		273.7/182.0
66.50%
1.444/1.922
Indy 426-1 Full PortingN/A2.250/1.940170--150/140
93.33%		221/191
86.43%
455 hp		288/233
80.90%
592 hp		360/252
70.00%
741 hp
803 hp		416/258
62.02%
928 hp		454/264
58.15%
1139 hp		314.8/223.0
70.83%
Indy 426-1RA Full Porting251/1172.400/1.940170--220/167
75.91%		295/212
71.86%
607 hp		355/257
72.39%
730 hp		380/285
75.00%
782 hp
848 hp		420/322
76.67%
937 hp		464/331
71.34%
1165 hp		355.7/262.3
73.76%
1.849/2.829
Indy 426-1RA6 Full Porting325/1302.400/1.940166--248/189
76.21%		329/243
73.86%
677 hp		380/288
75.79%
782 hp		429/318
74.13%
883 hp
957 hp		485/335
69.07%
1082 hp		489/356
72.80%
1227 hp		393.3/288.2
73.26%
1.505/2.738
Indy 426-Billet Full Porting360/1552.400/1.940166--282/205
72.70%		345/258
74.78%
710 hp		405/304
75.06%
833 hp		458/345
75.33%
942 hp
1022 hp		490/369
75.31%
1094 hp		515/390
75.73%
1293 hp		415.8/311.8
74.99%
1.431/2.516


Cummins
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .0787" (2mm)
Intake / Exhaust		 .1575" (4mm)
Intake / Exhaust		 .2362" (6mm)
Intake / Exhaust		 .3150" (8mm)
Intake / Exhaust		 .3937" (10mm)
Intake / Exhaust		 .4724" (12mm)
Intake / Exhaust		 .5512" (14mm)
Intake / Exhaust		 Average
Intake / Exhaust
2V B Series DieselN/A-N/A51.1/-91.1/-132.7/-147/-
hp		160.7/-169.4/-172/-
hp		159.5
Dodge
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
12V DieselN/A-N/A---145/153
105.5%
hp		----
12V Diesel Ported Stage 1 Piers Diesel ResearchN/A-N/A---154/168
109.0%
hp		----
24V DieselN/A-N/A---161/173
107.4%
hp		----
24V Diesel Ported Stage 1 Piers Diesel ResearchN/A-N/A---181/196
108.2%
hp		----


Ford
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 .900"
Intake / Exhaust		 1.000"
Intake / Exhaust		 Average
Intake / Exhaust
Ford Y ECZ-GN/A1.927/1.510N/A62/51
82.26%		116/87
75.00%		147/102
69.39%		166/114
68.67%
341 hp		171/123
71.93%
352 hp		-----132.4/95.45
72.05%
Ford Y ECZ-G Ported Ford-Y-Block StreetN/A1.940/1.600N/A64/57
89.06%		122/94
77.05%		165/126
76.36%		193/143
74.09%
397 hp		215/152
70.70%
442 hp		-----151.8/114.4
75.36%
Ford Y ECZ-G Ported Ford-Y-Block PerformanceN/A2.020/1.600N/A69/64
92.75%		129/108
83.72%		177/141
79.66%		212/161
75.94%
436 hp		227/177
77.97%
467 hp		-----162.8/130.2
79.98%
Ford 2.3 SVO TurboN/A-N/A65/62
95.38%		99/88
88.89%		131/109
83.21%		157/128
81.53%
161.5 hp		173/140
80.92%
177.9 hp		-----125.0/105.4
84.32%
Ford 2.3 SVO Turbo Ported PowerHeadsN/A1.890/1.590N/A73/72
98.63%		115/103
89.57%		153/126
82.35%		189/151
79.89%
194.4 hp		214/175
81.78%
220.1 hp		-----148.8/125.4
84.27%
Ford 2.3 EsslingerN/A-N/A65/51
78.46%		116/101
87.07%		162/134
82.72%		201/154
76.62%
206.7 hp		228/172
75.44%
234.5 hp		241/183
75.93%
247.9 hp
268.9 hp		----168.8/132.5
78.48%
Ford 3.8 SCN/A-N/A52/40
76.92%		82/71
86.59%		111/95
85.59%		144/113
78.47%
222.2 hp		170/123
72.35%
262.3 hp		181/127
70.17%
279.3 hp
303 hp		----123.3/94.88
76.89%
Ford 3.8 SC Ported Coy MillerN/A1.850/1.625N/A56/50
89.29%		113/103
91.15%		164/144
87.80%		199/187
93.97%
307 hp		216/201
93.06%
333 hp		225/208
92.44%
347 hp
377 hp		----162.2/148.8
91.78%
Ford 3.8 SC Ported Stiegemeier RacingN/A1.875/1.600N/A-131/120
91.60%		181/166
91.71%		217/206
94.93%
335 hp		229/212
92.58%
353 hp		232/215
92.67%
358 hp
388 hp		----198.0/183.8
92.83%
Cleveland
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 .900"
Intake / Exhaust		 1.000"
Intake / Exhaust		 Average
Intake / Exhaust
Ford 351 C2V IronN/A-N/A---203/145
71.43%
418 hp		-230/172
74.78%
473 hp
513 hp		----216.5/158.5
73.21%
Ford 351 C4V D1ZE-GA Iron244/1372.190/1.71076-----284/154
54.23%
584 hp
634 hp		----N/A
N/A
1.164/1.124
Ford 351 C4V IronN/A-N/A-131/88
67.18%		188/129
68.62%		220/146
66.36%
453 hp		256/159
62.11%
527 hp		269/165
61.34%
553 hp
600 hp		279/166
59.50%
623 hp		---223.8/142.2
63.51%
Ford Aussie 2V IronN/A-N/A59/44
74.58%		112/79
70.54%		156/109
69.87%		178/130
73.03%
366 hp		187/153
81.82%
385 hp		-----138.4/103.0
74.42%
Ford Aussie 2V Ported PowerHeads IronN/A2.190/1.7106279/75
94.94%		154/109
70.78%		206/156
75.73%		231/180
77.92%
475 hp		244/200
81.97%
502 hp		-----182.8/144.0
78.77%
Ford Aussie 2V Ported John Brides IronN/A2.080/1.650N/A73/51
69.86%		158/97
61.39%		225/120
53.33%		240/139
57.92%
494 hp		246/160
65.04%
506 hp		-----188.4/113.4
60.19%
FE
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 .900"
Intake / Exhaust		 1.000"
Intake / Exhaust		 Average
Intake / Exhaust
Ford C8AE-H IronN/A-68-71-115/88
76.52%		168/122
72.62%		198/133
67.17%
407 hp		202/139
68.81%
416 hp		-----170.8/120.5
70.57%
Ford C4AE-6090G IronN/A-N/A-130/111
85.38%		180/135
75.00%		220/155
70.45%
453 hp		236/165
69.92%
485 hp		246/165
67.07%
506 hp
549 hp		----202.4/146.2
72.23%
Ford 427 Med Riser IronN/A-67----240/-
494 hp		250/-
514 hp
558 hp		----245.0
Ford 427 Med Riser Ported Keith Craft IronN/A-67-----300/-
617 hp
670 hp		-----
Ford 427 Med? Riser IronN/A-67-----296/177
59.80%
609 hp
661 hp		-----
Ford 427 Hi? Riser IronN/A-67-----284/177
62.32%
584 hp
634 hp		-----
Ford 427 Hi Riser C4AE-6090F Iron193/125-67-----------
Ford 427 Tunnel PortN/A2.250/1.73088-90-----308/166
53.90%
634 hp
687 hp		-----
Ford 427 Tunnel Port C7OEN/A-N/A--216/141
65.28%		251/173
68.92%
516 hp		269/182
67.66%
553 hp		294/184
62.59%
605 hp
656 hp		307/186
60.59%
685 hp		---267.4/173.2
64.77%
Ford 427 SOHCN/A-N/A-----355/248
69.86%
730 hp
792 hp		-----
Ford 428 CJ Iron152/1222.090/1.660N/A76/46
60.53%		150/85
56.67%		202/118
58.42%		228/145
63.60%
469 hp		236/163
69.07%
485 hp		243/174
71.60%
500 hp
542 hp		244/181
74.18%
545 hp		---197.0/130.3
66.13%
1.605/1.484
Ford 428 CJ Canadian Iron170/123-N/A-----------
Edelbrock #6006 AlumN/A2.090/1.660N/A-149/112
75.17%		185/148
80.00%		222/171
77.03%
457 hp		252/183
72.62%
518 hp		-----202.0/153.5
75.99%
Edelbrock #60079 Alum170/1252.090/1.6607688/64
72.73%		153/113
73.86%		195/148
75.90%		233/171
73.39%
479 hp		265/183
69.06%
545 hp		270/200
74.07%
555 hp
603 hp		----200.7/146.5
73.01%
1.588/1.600
Edelbrock Ported Keith Craft AlumN/A2.250/1.750N/A------355/-
792 hp		370-380/ 270-280---
Shelby 427 Alum163/1282.250/1.75082-----280/185
66.07%
576 hp
625 hp		----N/A
N/A
1.718/1.445
Shelby 427 Alum Stage II PortingN/A-82-----320/235
73.44%
658 hp
714 hp		-----
Modular
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .550"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 .900"
Intake / Exhaust		 Average
Intake / Exhaust
2 V '92-'98146/-44.5mm/34mm51----156/116
74.36%
321 hp		-----N/A
N/A
1.068
'96-'98 Non P.I. Ported Steen RacingN/A-N/A-----190/165
86.84%
391 hp
424 hp		-----
'99 & up P.I.159/-44.5mm/36mm42-----163/150
92.02%
335 hp
364 hp		----N/A
N/A
1.025
'99 & up P.I. Ported Steen RacingN/A-N/A----210/170
80.95%
432 hp		------
'99 & up P.I. Ported Stage 1 Fox LakeN/A-N/A-----200/182
91.00%
411 hp
446 hp		-----
'99 & up P.I. Ported Stage 2 Fox LakeN/A-N/A-----223/195
87.44%
459 hp
498 hp		-----
4.6L 2V P.I. Performance C.A.P.A. PerformanceN/A46.83mm/35.88mm53-----185/148
80.00%
381 hp
413 hp		-----
4.6L 2V P.I. Ported C.A.P.A. PerformanceN/A45mm/36mm47------225/205
91.11%
502 hp		----
Motorsport 2 V SVON/A-N/A-----215/147
68.37%
442 hp
480 hp		-----
4 V Cobra StockN/A-N/A-----260/201
77.31%
535 hp
580 hp		-----
4 V Cobra Ported Fox LakeN/A-N/A-----320/260
81.25%
658 hp
714 hp		-----
4.6L 4V '96-'98 Ported Stage 1 C.A.P.A. PerformanceN/AN/AN/A----272/172
63.24%
560 hp		------
4.6L 4V '96-'98 Ported Stage 2 C.A.P.A. PerformanceN/AN/A43----287/194
67.60%
590 hp		------
4.6L 4V '96-'98 Ported Full C.A.P.A. PerformanceN/AN/A52----304/241
79.28%
625 hp		------
4.6L 4V '99-'01 Ported Stage 1 C.A.P.A. PerformanceN/AN/A54----257/185
71.98%
529 hp		------
4.6L 4V '99-'01 Ported Stage 2 C.A.P.A. PerformanceN/AN/A54----273/195
71.43%
562 hp		------
4.6L 4V '99-'01 Ported Full C.A.P.A. PerformanceN/AN/A54----288/237
82.29%
592 hp		------
385 Series
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 .900"
Intake / Exhaust		 1.000"
Intake / Exhaust		 Average
Intake / Exhaust
Ford 429 IronN/A-N/A---229/174
75.98%
471 hp		254/177
69.69%
523 hp		272/177
65.07%
560 hp
607 hp		----251.7/176.0
69.93%
Ford 429 CJN/A2.240/1.720N/A----300/189
63.00%
617 hp		331/201
60.73%
681 hp
739 hp		----315.5/195.0
61.81%
Ford A-429N/A-N/A-152/115
75.66%		216/149
68.98%		253/177
69.96%
520 hp		280/190
67.86%
576 hp		290/197
67.93%
597 hp
647 hp		290/199
68.62%
647 hp		---246.8/171.2
69.35%
Ford 429 Iron DOVE-C CCMN/A2.060/1.7607565/47
72.31%		119/88
73.95%		178/115
64.61%		216/124
57.41%
444 hp		248/126
50.81%
510 hp		270/126
46.67%
555 hp
603 hp		286/-
638 hp		---197.4/104.3
Ford 429 Iron DOVE-C Ported Scott JohnstonN/A2.190/1.745
-
No Pipe		N/A86/60
69.77%		144/107
74.31%		204/140
68.63%		270/168
62.22%
555 hp		306/195
63.73%
629 hp		325/212
65.23%
669 hp
725 hp		342/222
64.91%
763 hp		360/230
63.89%
904 hp		--254.6/166.8
65.49%
Ford 429 New SCJ CCMN/A-7273/60
82.19%		155/106
68.39%		222/141
63.51%		275/177
64.36%
566 hp		314/191
60.83%
646 hp		317/203
64.04%
652 hp
708 hp		316/211
66.77%
705 hp		321/213
66.36%
806 hp		--249.1/162.8
65.33%
Ford 460 CJ SVON/A2.250/1.750N/A---240/165
68.75%
494 hp		274/176
64.23%
564 hp		292/181
61.99%
601 hp
652 hp		----268.7/174.0
64.76%
Ford 460 CJ AlumN/A-N/A-144/116
80.56%		199/159
79.90%		254/166
65.35%
523 hp		291/189
64.95%
599 hp		308/194
62.99%
634 hp
687 hp		322/195
60.56%
719 hp		---253.0/169.8
67.13%
Ford 460 CJ Alum PortedN/A-N/A-143/123
86.01%		202/176
87.13%		264/202
76.52%
543 hp		317/230
72.56%
652 hp		348/253
72.70%
716 hp
777 hp		371/256
69.00%
828 hp		---274.2/206.7
75.38%
Ford C-460 PortedN/A-N/A----456/330
72.37%
938 hp		480/365
76.04%
987 hp
1071 hp		496/379
76.41%
1107 hp		505/385
76.24%
1267 hp		--484.3/364.8
75.32%
Ford Boss 429N/A2.400/1.900N/A-----379/225
59.37%
780 hp
846 hp		-----
Ford New SCJ Jon KaaseN/A2.200/1.760N/A84/73
86.90%		181/119
65.75%		264/164
62.12%		330/183
55.45%
679 hp		357/199
55.74%
734 hp		345/218
63.19%
710 hp
770 hp		345/227
65.80%
770 hp		---272.3/169.0
62.07%
Ford New SCJ Jon Kaase Stage 1 PortingN/A-N/A------352/249
70.74%
786 hp		----
Ford New SCJ Jon Kaase Stage 2 PortingN/A-N/A-------419/266
63.48%
1052 hp		---
Blue Thunder Ported Flatlanders Stage 3 Ford ExhaustN/A2.250/1.88065------365/234
64.11%
815 hp		----
Blue Thunder Ported Flatlanders Stage 3 Chevy ExhaustN/A2.250/1.88065------365/245
67.12%
815 hp		----
Blue Thunder Ported Flatlanders Comp Ford ExhaustN/A2.250/1.88065------412/295
71.60%
920 hp		----
Blue Thunder Ported Flatlanders Comp Chevy ExhaustN/A2.250/1.88065------412/322
78.16%
920 hp		----
Edelbrock #60669, #60679 Performer RPM 460 Alum292/1002.190/1.76095/7576/67
88.16%		140/118
84.29%		207/153
73.91%		260/180
69.23%
535 hp		300/200
66.67%
617 hp		319/207
64.89%
656 hp
712 hp		326/207
63.50%
728 hp		---232.6/161.7
69.53%
1.116/2.070
Edelbrock #6066, #6067 Ported AlumN/A-N/A-160/125
78.13%		230/164
71.30%		289/201
69.55%
595 hp		330/221
66.97%
679 hp		360/242
67.22%
741 hp
803 hp		379/251
66.23%
846 hp		392/262
66.84%
984 hp		--305.7/209.4
68.50%
Edelbrock #61649, #61659, #61669 Performer RPM 460 CJ Alum310/1002.190/1.7607576/67
88.16%		140/118
84.29%		207/153
73.91%		260/180
69.23%
535 hp		300/200
66.67%
617 hp		319/207
64.89%
656 hp
712 hp		326/207
63.50%
728 hp		---232.6/161.7
69.53%
1.052/2.070
Pro-FilerP/N 205 BBF C420/-2.450/1.85060-165/135
81.82%		257/179
69.65%		331/218
65.86%
681 hp		395/262
66.33%
813 hp		-484/308
63.64%
1080 hp		512/322
62.89%
1285 hp		524/329
62.79%
1315 hp		521/334
64.11%
1308 hp		398.6/260.9
65.44%
1.248
Shanons Engineering - EX 514 Bowl BlendN/A2.350/1.94063-78------392/288
73.47%
875 hp		----
Shanons Engineering - EX 514 PortedN/A2.400/1.90063-78-------458/343
74.89%
1150 hp		---
Sonny's C-460N/A-65-------507/-
1272 hp		---
Windsor
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 .900"
Intake / Exhaust		 1.000"
Intake / Exhaust		 Average
Intake / Exhaust
Ford 289 IronN/A1.780/1.45N/A----165/107
64.85%
339 hp		------
Ford 289 HiPo IronN/A1.780/1.45N/A----170/121
71.18%
350 hp		------
Ford 302 E7TE Iron127/441.780/1.450N/A52/39
75.00%		95/74
77.89%		132/98
74.24%		141/104
73.76%
290.1 hp		154/107
69.48%
317 hp		-----114.8/84.45
73.52%
1.213/2.432
Ford 302 E7TE Iron CCMN/A-N/A59/39
66.10%		109/73
66.97%		142/100
70.42%		148/110
74.32%
304 hp		150/113
75.33%
309 hp		-----121.6/87.05
71.55%
Ford 302 E7TE Ported PowerHeads IronN/A1.900/1.600N/A60/59
98.33%		115/103
89.57%		164/142
86.59%		191/159
83.25%
393 hp		203/164
80.79%
418 hp		-----146.6/125.4
85.54%
Ford 302 E7TE Ported McCoy IronN/A-N/A----240/166
69.17%
494 hp		------
Ford GT-40 E7TZ145/-1.840/1.5406064/52
81.25%		111/98
88.29%		159/125
78.62%		183/129
70.49%
376 hp		187/129
68.98%
385 hp		192/129
67.19%
395 hp
429 hp		----149.3/110.3
73.88%
1.324
Ford GT-40P E7TZ CCM145/--6058/45
77.59%		121/88
72.73%		159/112
70.44%		186/125
67.20%
383 hp		190/127
66.84%
391 hp		195/128
65.64%
401 hp
435 hp		195/128
65.64%
435 hp		---157.7/107.6
68.21%
1.345
Ford GT-40X Iron CCM176/--N/A57/49
85.96%		110/89
80.91%		162/123
75.93%		193/150
77.72%
397 hp		215/155
72.09%
442 hp		230/155
67.39%
473 hp
513 hp		----161.2/120.2
74.56%
1.307
Ford 351 IronN/A-N/A-----177/142
80.23%
364 hp
395 hp		-----
AFR 165 Street165/691.900/1.60058-64-123/118
95.93%		186/153
82.26%		225/178
79.11%
463 hp		243/185
76.13%
500 hp		250/191
76.40%
514 hp
558 hp		----205.4/165.0
80.33%
1.515/2.768
AFR 165 Street CCM165/--N/A60/51
85.00%		123/108
87.80%		176/144
81.82%		210/174
82.86%
432 hp		232/184
79.31%
477 hp		232/188
81.03%
477 hp
518 hp		235/189
80.43%
525 hp		---181.1/148.3
81.86%
1.424
AFR 185 Street/Strip185/692.020/1.60058-64-129/118
91.47%		189/153
80.95%		234/178
76.07%
481 hp		267/185
69.29%
549 hp		277/191
68.95%
570 hp
618 hp		----219.2/165.0
75.27%
1.497/2.768
AFR 205 Race205/702.080/1.60058-141/125
88.65%		201/180
89.55%		251/211
84.06%
516 hp		291/225
77.32%
599 hp		306/231
75.49%
629 hp
683 hp		310/235
75.81%
692 hp		---250.0/201.2
80.47%
1.512/3.357
AFR 225 Race225/802.080/1.60060-149/130
87.25%		216/187
86.57%		264/230
87.12%
543 hp		295/242
82.03%
607 hp		312/250
80.13%
642 hp
696 hp		320/255
79.69%
714 hp		---259.3/215.7
83.16%
1.422/3.188
Brodix Track 1195/-2.080/1.60068-124/100
80.65%		172/129
75.00%		212/153
72.17%
436 hp		241/166
68.88%
496 hp		255/176
69.02%
525 hp
569 hp		261/180
68.97%
583 hp		---210.8/150.7
71.46%
1.338
Brodix ST 5.0 20 Deg171/-1.940/1.60060-130/100
76.92%		186/132
70.97%		225/156
69.33%
463 hp		237/172
72.57%
488 hp		241/184
76.35%
496 hp
538 hp		----203.8/148.8
73.01%
1.409
Brodix ST 5.0 R 20 Deg Ported M2185/-2.020/1.60066-145/119
82.07%		208/150
72.12%		245/179
73.06%
504 hp		272/198
72.79%
560 hp		277/209
75.45%
570 hp
618 hp		281/216
76.87%
627 hp		---238.0/178.5
75.00%
1.519
Canfield 192 Alum192/-2.020/1.6005870/54
77.14%		150/102
68.00%		204/132
64.71%		242/171
70.66%
498 hp		262/190
72.52%
539 hp		272/201
73.90%
560 hp
607 hp		274/207
75.55%
612 hp		---210.6/151.0
71.71%
1.427
Dart 170 Alum170/651.940/1.600
4.030
No Pipe		62-137/112
81.75%		200/151
75.50%		240/171
71.25%
494 hp		251/173
68.92%
516 hp		261/172
65.90%
537 hp
583 hp		----217.8/155.8
71.53%
1.535/2.662
Dart 195 Alum195/752.000/1.600
4.155
No Pipe		62-145/116
80.00%		205/150
73.17%		246/172
69.92%
506 hp		272/180
66.18%
560 hp		283/184
65.02%
582 hp
632 hp		288/185
64.24%
643 hp		---239.8/164.5
68.59%
1.477/2.467
Dart 20 Deg CNC Full Port Alum210/762.050/1.600
4.030
No Pipe		62-132/108
81.82%		195/151
77.44%		252/187
74.21%
518 hp		287/203
70.73%
590 hp		305/208
68.20%
627 hp
681 hp		304/212
69.74%
679 hp		---245.8/178.2
72.47%
1.452/2.789
Dart 20 Deg CNC Full Port Alum225/852.080/1.600
4.155
No Pipe		62-136/115
84.56%		201/164
81.59%		259/205
79.15%
533 hp		300/225
75.00%
617 hp		323/231
71.52%
664 hp
721 hp		325/238
73.23%
725 hp		---257.3/196.3
76.30%
1.444/2.800
Edelbrock #6022, #6032 OLD Alum170/601.900/1.6006072/57
79.17%		132/104
78.79%		183/142
77.60%		214/163
76.17%
440 hp		225/170
75.56%
463 hp		224/174
77.68%
461 hp
500 hp		----175.0/135.0
77.14%
1.324/2.900
Edelbrock #6025, #6035 OLD Alum170/602.020/1.6006070/57
81.43%		128/104
81.25%		183/142
77.60%		219/163
74.43%
451 hp		229/172
75.11%
471 hp		226/174
76.99%
465 hp
504 hp		----175.8/135.3
76.97%
1.347/2.900
Edelbrock #60289, #60379 Alum170/601.900/1.6006072/57
79.17%		131/105
80.15%		185/131
70.81%		214/156
72.90%
440 hp		223/168
75.34%
459 hp		226/175
77.43%
465 hp
504 hp		----175.2/132.0
75.36%
1.329/2.917
Edelbrock #60299, #60399 Alum170/602.020/1.6006070/57
81.43%		130/104
80.00%		185/142
76.76%		219/163
74.43%
451 hp		229/172
75.11%
471 hp		226/175
77.43%
465 hp
504 hp		----176.5/135.5
76.77%
1.347/2.917
Edelbrock/Glidden #61099 Victor CNC Alum280/942.150/1.5606178/55
70.51%		152/110
72.37%		230/182
79.13%		275/216
78.55%
566 hp		330/230
69.70%
679 hp		355/238
67.04%
730 hp
792 hp		365/242
66.30%
815 hp		---255.0/181.9
71.32%
1.304/2.574
Edelbrock/Chapman #61299 Victor CNC Alum276/952.100/1.6506170/53
75.71%		141/105
74.47%		212/182
85.85%		273/204
74.73%
562 hp		315/227
72.06%
648 hp		343/237
69.10%
706 hp
766 hp		355/242
68.17%
792 hp		---244.1/178.6
73.14%
1.286/2.547
Edelbrock #77169, #77179, #77189, #77199, #77389 Victor Jr. Alum210/752.050/1.60060/7064/54
84.38%		127/108
85.04%		186/140
75.27%		234/167
71.37%
481 hp		268/189
70.52%
551 hp		291/195
67.01%
599 hp
649 hp		285/199
69.82%
636 hp		---207.9/150.3
72.30%
1.386/2.653
Edelbrock #7721 OLD Alum240/802.125/1.6254776/67
88.16%		141/110
78.01%		203/152
74.88%		256/187
73.05%
527 hp		298/210
70.47%
613 hp		323/215
66.56%
664 hp
721 hp		339/220
64.90%
757 hp		---233.7/165.9
70.97%
1.413/2.750
Edelbrock #77289, #77299 Alum255/902.100/1.62548/5868/54
79.41%		145/112
77.24%		215/167
77.67%		266/198
74.44%
547 hp		303/206
67.99%
623 hp		323/207
64.09%
664 hp
721 hp		327/209
63.91%
730 hp		---235.3/164.7
70.01%
1.282/2.322
Edelbrock Victor Jr. Alum CCMN/A-N/A66/53
80.30%		127/109
85.83%		186/150
80.65%		233/179
76.82%
479 hp		266/193
72.56%
547 hp		276/201
72.83%
568 hp
616 hp		276/204
73.91%
616 hp		---204.3/155.6
76.15%
HRD Yates/C3 Cup HeadN/A2.160/1.580N/A-145/114
78.62%		224/171
76.34%		291/232
79.73%
599 hp		339/252
74.34%
697 hp		364/265
72.80%
749 hp
812 hp		379/272
71.77%
846 hp		---290.3/217.7
74.97%
Holley 5.0 Systemax175.5/711.940/1.6006163/56
88.89%		124/100
80.65%		174/130
74.71%		206/155
75.24%
424 hp		221/167
75.57%
455 hp		233/176
75.54%
479 hp
520 hp		----170.2/130.7
76.79%
Pro Action Alum180/-2.020/1.60058/6472/60
83.33%		154/121
78.57%		208/159
76.44%		254/184
72.44%
523 hp		271/193
71.22%
557 hp		274/199
72.63%
564 hp
612 hp		276/202
73.19%
616 hp		---215.6/159.7
74.09%
1.533
Pro Action Alum200/-2.020/1.60058/64------286/202
70.63%
638 hp		---N/A
N/A
1.430
Pro Action Alum215/-2.080/1.60058/6475/60
80.00%		151/121
80.13%		217/159
73.27%		267/184
68.91%
549 hp		302/193
63.91%
621 hp		310/199
64.19%
638 hp
692 hp		314/202
64.33%
701 hp		---233.7/159.7
68.34%
1.460
TFS Street Heat192/-2.020/1.60064-----255/190
74.51%
525 hp
569 hp		----N/A
N/A
1.328
Trick Flow 51400002/3 CARB170/66-6163/53
84.13%		141/107
75.89%		205/144
70.24%		233/171
73.39%
479 hp		251/187
74.50%
516 hp		251/193
76.89%
516 hp
560 hp		----190.7/142.5
74.74%
1.476/2.924
Trick Flow 52400010/1 Twisted Wedge170/-2.020/1.600N/A63/53
84.13%		141/107
75.89%		205/144
70.24%		233/171
73.39%
479 hp		251/187
74.50%
516 hp		251/193
76.89%
516 hp
560 hp		----190.7/142.5
74.74%
1.476
Trick Flow 52400001/2 - R Series206/92-6168/50
73.53%		147/102
69.39%		205/146
71.22%		242/178
73.55%
498 hp		275/200
72.73%
566 hp		296/212
71.62%
609 hp
661 hp		305/222
72.79%
681 hp		---219.7/158.6
72.17%
1.481/2.413
Trick Flow 52400001/2 - R Series Blend & PolishN/A-6166/55
83.33%		146/111
76.03%		208/157
75.48%		254/200
78.74%
523 hp		287/225
78.40%
590 hp		307/244
79.48%
632 hp
685 hp		325/254
78.15%
725 hp		---227.6/178.0
78.22%
Windsor Sr197/-2.020/1.60065--162/121
74.69%		196/137
69.90%
403 hp		218/149
68.35%
448 hp		225/160
71.11%
463 hp
502 hp		----200.3/141.8
70.79%
1.142
World Windsor Jr171/--N/A116/84
72.41%		159/96
60.38%		189/120
63.49%		204/126
61.76%
420 hp		216/129
59.72%
444 hp		222/132
59.46%
457 hp
495 hp		----184.3/114.5
62.12%
1.298
World Roush 200N/A-N/A-129/117
90.70%		187/139
74.33%		232/145
62.50%
477 hp		257/140
54.47%
529 hp		260/152
58.46%
535 hp
580 hp		264/154
58.33%
589 hp		---221.5/141.2
63.73%


Honda
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
Honda B16N/A-N/A75/-151/-194/-233/-
239.7 hp		253/-
260.2 hp		--181.2
Honda H22N/A-N/A87/-166/-219/-251/-
258.2 hp		268/-
275.7 hp		--198.2
Honda V-TechN/A-N/A85/76
89.41%		160/143
89.38%		201/167
83.08%		240/169
70.42%
246.9 hp		254/171
67.32%
261.3 hp		--188.0/145.2
77.23%
Honda V-Tech Ported M2N/A-N/A85/72
84.71%		163/152
93.25%		218/194
88.99%		259/214
82.63%
266.4 hp		283/225
79.51%
291.1 hp		--201.6/171.4
85.02%
Dart Honda AlumN/A-
-
No Pipe		N/A99/90
90.91%		168/152
90.48%		215/176
81.86%		250/179
71.60%
257.1 hp		269/178
66.17%
276.7 hp		--200.2/155.0
77.42%
Dart Honda CNC Alum135/9034mm/28mm
81.5mm
No Pipe		N/A100/92
92.00%		168/168
100.0%		236/207
87.71%		275/221
80.36%
282.9 hp		320/224
70.00%
329 hp		--219.8/182.4
82.98%
2.370/2.489
Pro Topline Honda V-Tech Stock AlumN/A33mm/28mmN/A----265/-
272.6 hp		---
Pro Topline Honda V-Tech Cast Blended AlumN/A33.5mm/28.5mmN/A----275/-
282.9 hp		---
Pro Topline Honda V-Tech CNC AlumN/A34mm/29mmN/A----295/-
303 hp		---
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .137"
Intake / Exhaust		 .201"
Intake / Exhaust		 .268"
Intake / Exhaust		 .335"
Intake / Exhaust		 .401"
Intake / Exhaust		 .468"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
Honda B-18 CNC Ported by HRDN/A-N/A100/90
90.00%		163/144
88.34%		200/190
95.00%		235/205
87.23%
241.7 hp		255/218
85.49%
262.3 hp		265/225
84.91%
272.6 hp
295.7 hp		-203.0/178.7
88.01%


Olds
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 Average
Intake / Exhaust
Olds Iron177/133-N/A-----207/162
78.26%
426 hp
462 hp		--N/A
N/A
1.169/1.218
Olds 350 #5 IronN/A-N/A-131/92
70.23%		180/123
68.33%		205/138
67.32%
422 hp		222/144
64.86%
457 hp		234/148
63.25%
481 hp
522 hp		--194.4/129.0
66.36%
Olds 350 #6 IronN/A-N/A-140/95
67.86%		186/129
69.35%		222/142
63.96%
457 hp		228/147
64.47%
469 hp		233/153
65.67%
479 hp
520 hp		--201.8/133.2
66.01%
Olds 350 #7&7a IronN/A-N/A-140/99
70.71%		186/126
67.74%		208/139
66.83%
428 hp		222/148
66.67%
457 hp		226/152
67.26%
465 hp
504 hp		--196.4/132.8
67.62%
Olds 350 #8 IronN/A1.875/1.625N/A-144/108
75.00%		197/114
57.87%		220/121
55.00%
453 hp		229/125
54.59%
471 hp		230/131
56.96%
473 hp
513 hp		--204.0/119.8
58.73%
Olds 350 #8 Ported MID-AM Performance IronN/A2.000/1.680N/A-160/116
72.50%		220/142
64.55%		249/161
64.66%
512 hp		261/170
65.13%
537 hp		272/180
66.18%
560 hp
607 hp		--232.4/153.8
66.18%
Olds 403 #4A IronN/A2.000/1.500N/A-144/92
63.89%		199/111
55.78%		218/123
56.42%
448 hp		226/128
56.64%
465 hp		228/130
57.02%
469 hp
509 hp		--203.0/116.8
57.54%
Olds 403 #4A Ported MID-AM Performance IronN/A2.000/1.680N/A-163/112
68.71%		224/140
62.50%		248/152
61.29%
510 hp		265/166
62.64%
545 hp		272/179
65.81%
560 hp
607 hp		--234.4/149.8
63.91%
Olds C IronN/A2.080/1.680N/A-----230/162
70.43%
473 hp
513 hp		---
Olds C Ported IronN/A-N/A---220/155
70.45%
453 hp		250/175
70.00%
514 hp		275/205
74.55%
566 hp
614 hp		290/220
75.86%
647 hp		-258.8/188.8
72.95%
Olds C Ported Zoltan IronN/A2.072/1.710N/A78/61
78.21%		149/115
77.18%		199/152
76.38%		236/178
75.42%
485 hp		259/209
80.69%
533 hp		279/218
78.14%
574 hp
623 hp		--200.0/155.5
77.75%
Olds G IronN/A-N/A---190/140
73.68%
391 hp		200/150
75.00%
411 hp		205/155
75.61%
422 hp
458 hp		--198.3/148.3
74.79%
Olds 455 J IronN/A2.000/1.625N/A-144/89
61.81%		205/121
59.02%		222/125
56.31%
457 hp		226/126
55.75%
465 hp		226/127
56.19%
465 hp
504 hp		--204.6/117.6
57.48%
Olds 455 J Ported MID-AM Performance IronN/A2.071/1.710N/A-166/114
68.67%		229/148
64.63%		252/165
65.48%
518 hp		264/175
66.29%
543 hp		271/185
68.27%
557 hp
605 hp		--236.4/157.4
66.58%
Olds Iron Head - M & J Proformance Bowl Porting Street.StripN/A-N/A-----270/180
66.67%
555 hp
603 hp		---
Olds Iron Head - M & J Proformance CNC ported RaceN/A-N/A-----300/195
65.00%
617 hp
670 hp		---
Edelbrock #60519 Alum188/1062.072/1.6807767/54
80.60%		131/102
77.86%		195/137
70.26%		246/163
66.26%
506 hp		278-256/179268-259/188--159.8/114.0
71.36%
1.309/1.538
Edelbrock #6051 Ported AlumN/A-N/A-----315/218
69.21%
648 hp
703 hp		---
Bulldog Performance212/-2.150/1.750
4.160		N/A79/67
84.81%		141/116
82.27%		204/155
75.98%		244/180
73.77%
502 hp		279/204
73.12%
574 hp		287/216
75.26%
590 hp
641 hp		292/226
77.40%
652 hp		-218.0/166.3
76.28%
1.377
Dick Miller / Bulldog Performance - Small BlockN/A2.080/1.690N/A73/57
78.08%		133/93
69.92%		180/131
72.78%		221/169
76.47%
455 hp		246/182
73.98%
506 hp		258/204
79.07%
531 hp
576 hp		264/216
81.82%
589 hp		271/221
81.55%
680 hp		205.8/159.1
77.34%
Dick Miller / Bulldog Performance - Street StripN/A2.190/1.810N/A73/57
78.08%		137/99
72.26%		193/137
70.98%		239/173
72.38%
492 hp		272/201
73.90%
560 hp		291/220
75.60%
599 hp
649 hp		302/233
77.15%
674 hp		308/240
77.92%
773 hp		226.9/170.0
74.93%
Dick Miller / Bulldog Performance255/--76-----300/-
617 hp
670 hp		--N/A
N/A
1.176
Dick Miller / Bulldog Performance275/--76-----340/-
699 hp
759 hp		--N/A
N/A
1.236
Mondello / KnowltonN/A2.250/1.680N/A----329/-
677 hp		350/-
720 hp
781 hp		380/-
848 hp		401/-
1006 hp		365.0


Pontiac
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 .800"
Intake / Exhaust		 Average
Intake / Exhaust
GM 3800160/601.800/1.520N/A-112/102
91.07%		155/134
86.45%		176/145
82.39%
271.5 hp		187/149
79.68%
288.5 hp		---157.5/132.5
84.13%
1.169/2.483
GM 3800 TEP PortedN/A1.800/1.520N/A-125/111
88.80%		167/137
82.04%		195/149
76.41%
301 hp		211/182
86.26%
326 hp		---174.5/144.8
82.95%
GM 3800 TEP PortedN/A1.800/1.570N/A-127/110
86.61%		167/159
95.21%		193/186
96.37%
297.8 hp		207/194
93.72%
319 hp		---173.5/162.3
93.52%
Pontiac 5C Iron151/1382.110/1.770N/A----222/171
77.03%
457 hp		---N/A
N/A
1.470/1.239
Pontiac 6X Iron158/1462.110/1.66091/10182/45
54.88%		142/93
65.49%		181/128
70.72%		200/142
71.00%
411 hp		212/148
69.81%
436 hp		215/149
69.30%
442 hp
480 hp		--172.0/117.5
68.31%
1.361/1.021
Pontiac
6X Ported Iron		N/A-N/A83/57
68.67%		158/114
72.15%		205/136
66.34%		239/143
59.83%
492 hp		244/150
61.48%
502 hp		248/152
61.29%
510 hp
554 hp		--196.2/125.3
63.89%
Pontiac 16 Iron162/1502.110/1.770N/A----244/171
70.08%
502 hp		---N/A
N/A
1.506/1.140
Pontiac 16 Jim Butler IronN/A-N/A-143/109
76.22%		208/145
69.71%		228/158
69.30%
469 hp		245/164
66.94%
504 hp		252/176
69.84%
518 hp
562 hp		259/176
67.95%
578 hp		-222.5/154.7
69.51%
Pontiac 16 Jim Butler Ported IronN/A2.110/1.770N/A-154/106
68.83%		220/149
67.73%		256/178
69.53%
527 hp		271/198
73.06%
557 hp		293/217
74.06%
603 hp
654 hp		299/223
74.58%
667 hp		-248.8/178.5
71.73%
Pontiac 64 Ported Jim Hand Iron163/-2.110/1.770N/A--205/149
72.68%		--254/202 - .550
523 hp
567 hp		--229.5
N/A
1.558
Pontiac No. 77 IronN/A1.920/1.6606882/46
56.10%		145/86
59.31%		177/111
62.71%		185/128
69.19%
381 hp		189/138
73.02%
389 hp		194/143
73.71%
399 hp
433 hp		--162.0/108.7
67.08%
Pontiac No. 670 Iron162/1502.110/1.770N/A87/41
47.13%		152/100
65.79%		198/136
68.69%		204/166
81.37%
420 hp		205/185
90.24%
422 hp		205/194
94.63%
422 hp
458 hp		--175.2/137.0
78.21%
1.265/1.293
Pontiac No. 670 Ported Shanons Engineering IronN/A-N/A75/55
73.33%		149/116
77.85%		208/155
74.52%		236/185
78.39%
485 hp		239/206
86.19%
492 hp		242/218
90.08%
498 hp
540 hp		241/225
93.36%
538 hp		241/228
94.61%
605 hp		203.9/173.5
85.10%
Pontiac
Ram Air III Iron		N/A2.110/1.7707294-162/98
60.49%		197/133
67.51%		208/150
72.12%
428 hp		212/164
77.36%
436 hp		216/172
79.63%
444 hp
482 hp		--199.0/143.4
72.06%
Pontiac
Ram Air IV 722 ('69) Iron		187/1622.110/1.77065-----225/177
78.67%
463 hp
502 hp		--N/A
N/A
1.203/1.093
Pontiac
Ram Air IV KRE Ported Iron		N/A-N/A-----305/-
627 hp
681 hp		-/250--
Pontiac 455 SD IronN/A2.110/1.770N/A-----249/161
64.66%
512 hp
556 hp		---
Pontiac D-Port KRE Ported IronN/A-N/A-----285/240
84.21%
586 hp
636 hp		---
Pontiac #10045427 Alum460/1452.280/1.94991--252/195
77.38%		324/237
73.15%
667 hp		378/270
71.43%
778 hp		405/285
70.37%
833 hp
904 hp		432/297
68.75%
964 hp		-358.2/256.8
71.69%
0.939/2.048
Edelbrock #6057 Alum CCM215/1752.110/1.6608765/40
61.54%		134/102
76.12%		186/133
71.51%		228/161
70.61%
469 hp		260/177
68.08%
535 hp		282/184
65.25%
580 hp
629 hp		293/190
64.85%
654 hp		-206.9/141.0
68.16%
1.363/1.086
Edelbrock #60579 Alum215/1752.110/1.6608772/56
77.78%		138/106
76.81%		198/141
71.21%		239/163
68.20%
492 hp		264/175
66.29%
543 hp		275/185
67.27%
566 hp
614 hp		--197.7/137.7
69.65%
1.279/1.057
Edelbrock #60599 Alum215/1752.110/1.6607271/69
97.18%		143/120
83.92%		208/151
72.60%		253/173
68.38%
520 hp		272/191
70.22%
560 hp		286/199
69.58%
588 hp
638 hp		--205.5/150.5
73.24%
1.330/1.137
Early ('97) Edelbrock Jim Butler Ported Alum228/-2.110/1.770
4.185		N/A58/51
87.93%		139/109
78.42%		206/150
72.82%		262/183
69.85%
539 hp		289/209
72.32%
595 hp		304/220
72.37%
625 hp
679 hp		306/225
73.53%
683 hp		307/225
73.29%
771 hp		233.9/171.5
73.33%
1.346
Edelbrock Chapman Ported Alum232/-2.200/1.770
-
No Pipe		8071/57
80.28%		148/130
87.84%		219/174
79.45%		272/214
78.68%
560 hp		303/221
72.94%
623 hp		321/228
71.03%
660 hp
716 hp		325/233
71.69%
725 hp		-237.0/179.6
75.77%
1.401
Edelbrock KRE Ported AlumN/A-N/A------328/260
79.27%
732 hp		--
KRE Head180/1572.110/1.660N/A92/85
92.39%		152/141
92.76%		201/182
90.55%		236/210
88.98%
485 hp		256/226
88.28%
527 hp		263/232
88.21%
541 hp
587 hp		--200.0/179.3
89.67%
1.461/1.478
Wenzler Series IIN/A-60-9068/66
97.06%		140/119
85.00%		207/158
76.33%		257/193
75.10%
529 hp		274/216
78.83%
564 hp		288/224
77.78%
592 hp
643 hp		--205.7/162.7
79.09%
Wenzler Series II KRE PortedN/A2.150/1.770N/A------330/260
78.79%
737 hp		--


Subaru
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
EJ20N/A-N/A53/46
86.79%		117/86
73.50%		144/103
71.53%		151/111
73.51%
155.3 hp		---116.3/86.55
74.41%
EJ22TN/A-N/A---193/147
76.17%
198.5 hp		----
EJ25N/A-N/A---/182240/-
246.9 hp		----


VW
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
1.6N/A-N/A68/64
94.12%		129/118
91.47%		160/148
92.50%		170/154
90.59%
174.9 hp		174/157
90.23%
179.0 hp		--140.2/128.2
91.44%
1.8 16VN/A-N/A80/-121/-154/-195/-
200.6 hp		203/-
208.8 hp		--150.6
2.0 8V X-FlowN/A-N/A54/39
72.22%		102/75
73.53%		129/90
69.77%		136/96
70.59%
139.9 hp		137/97
70.80%
140.9 hp		--111.6/79.45
71.15%
2.0 8V X-Flow PortedN/A-N/A----174/-
179.0 hp		---
CabrioletsN/A-N/A57/49
85.96%		97/90
92.78%		130/113
86.92%		139/131
94.24%
143.0 hp		148/141
95.27%
152.2 hp		--114.2/104.8
91.77%


Buell
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
Stock ThunderstormN/A-N/A57/49
85.96%		117/95
81.20%		164/139
84.76%		194/156
80.41%
99.82 hp		204/161
78.92%
104.9 hp		--147.2/120.0
81.52%
Street Ported ThunderstormN/A-N/A57/47
82.46%		120/90
75.00%		171/142
83.04%		211/167
79.15%
108.5 hp		234/177
75.64%
120.3 hp		246/186
75.61%
126.5 hp
137.3 hp		-173.2/134.8
77.86%


Harley-Davidson
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
Stock Twin CamN/A-N/A61/57
93.44%		124/104
83.87%		180/132
73.33%		196/143
72.96%
100.8 hp		199/152
76.38%
102.3 hp		202/157
77.72%
103.9 hp
112.7 hp		-160.3/124.2
77.44%
Twin Cam 88 Ported HardyN/A-N/A66/54
81.82%		130/117
90.00%		192/159
82.81%		236/180
76.27%
121.4 hp		247/194
78.54%
127.0 hp		247/201
81.38%
127.0 hp
137.8 hp		-186.3/150.8
80.95%
Twin Cam 88 ported FLO HeadworksN/A1.937/1.68710061/60
98.36%		122/120
98.36%		190/157
82.63%		212/188
88.68%
109.0 hp		231/210
90.91%
118.8 hp		--163.2/147.0
90.07%
Ironhead Sportster ported FLO HeadworksN/A1.937/1.750N/A60/59
98.33%		117/94
80.34%		164/128
78.05%		191/152
79.58%
98.27 hp		200/168
84.00%
102.9 hp		--146.4/120.2
82.10%
Panhead and Knuckhead ported FLO HeadworksN/A1.937/1.750N/A55/54
98.18%		112/112
100.0%		156/139
89.10%		180/163
90.56%
92.62 hp		192/177
92.19%
98.79 hp		--139.0/129.0
92.81%
Shovelhead ported FLO HeadworksN/A1.937/1.750N/A61/56
91.80%		130/115
88.46%		182/138
75.82%		217/167
76.96%
111.6 hp		234/192
82.05%
120.3 hp		--164.8/133.6
81.07%
Evo Sportster 883 ported HardyN/A-N/A58/-120/-175/-209/-
107.5 hp		217/-
111.6 hp		--155.8
Evo Sportster 883 ported FLO HeadworksN/A1.750/1.500N/A51/47
92.16%		110/97
88.18%		166/147
88.55%		200/176
88.00%
102.9 hp		213/183
85.92%
109.5 hp		--148.0/130.0
87.84%
Stock 1200 Evo SportsterN/A-N/A68/-115/-166/-193/-
99.30 hp		198/-
101.8 hp		--148.0
1200 EVO Sportster ported FLO HeadworksN/A1.812/1.562N/A57/51
89.47%		120/102
85.00%		176/154
87.50%		213/181
84.98%
109.5 hp		228/192
84.21%
117.3 hp		--158.8/136.0
85.64%
Evo Big Twin ported FLO HeadworksN/A1.937/1.687N/A62/55
88.71%		124/119
95.97%		188/156
82.98%		225/184
81.78%
115.7 hp		234/207
88.46%
120.3 hp		--166.6/144.2
86.55%
Edelbrock Performer 1200 EVO Sportster (OLD) AlumN/A-6267/64
95.52%		127/118
92.91%		171/145
84.80%		206/168
81.55%
105.9 hp		232/183
78.88%
119.3 hp		250/194
77.60%
128.6 hp
139.5 hp		-175.5/145.3
82.81%
Edelbrock Performer EVO big Twin (OLD) AlumN/A1.850/1.6107270/67
95.71%		129/118
91.47%		189/145
76.72%		215/168
78.14%
110.6 hp		248/183
73.79%
127.5 hp		251/194
77.29%
129.1 hp
140.1 hp		-183.7/145.8
79.40%
Edelbrock Performer RPM CNC Evo big Twin (OLD) AlumN/A1.940/1.62572/8874/68
91.89%		139/118
84.89%		192/150
78.13%		226/170
75.22%
116.2 hp		260/185
71.15%
133.7 hp		277/198
71.48%
142.5 hp
154.6 hp		-194.7/148.2
76.11%
Edelbrock #1692, #1693, #1695, #1696 Performer RPM Sportster AlumN/A1.850/1.6106263/57
90.48%		126/101
80.16%		172/132
76.74%		208/154
74.04%
107.0 hp		229/170
74.24%
117.8 hp		246/181
73.58%
126.5 hp
137.3 hp		-174.0/132.5
76.15%
Edelbrock #3021, #3022 Performer RPM EVO Big Bore CNC AlumN/A2.000/1.62583/9268/61
89.71%		137/113
82.48%		195/153
78.46%		238/176
73.95%
122.4 hp		269/185
68.77%
138.3 hp		283/197
69.61%
145.5 hp
157.9 hp		-198.3/147.5
74.37%
Edelbrock #1602, #1603, #1615, #1616 Performer EVO 80" AlumN/A1.850/1.6107263/58
92.06%		130/105
80.77%		187/145
77.54%		225/165
73.33%
115.7 hp		244/179
73.36%
125.5 hp		251/188
74.90%
129.1 hp
140.1 hp		-183.3/140.0
76.36%
Edelbrock #1604, #1606, #1607, #1624 Performer EVO 80" & up CNC AlumN/A1.940/1.6257269/60
86.96%		136/111
81.62%		192/150
78.13%		233/170
72.96%
119.8 hp		265/183
69.06%
136.3 hp		275/193
70.18%
141.4 hp
153.4 hp		-195.0/144.5
74.10%
Edelbrock #1687, #1688, #1694, #1697 Performer RPM Twin Cam CNC AlumN/A1.940/1.62572/8869/60
86.96%		136/111
81.62%		192/150
78.13%		223/170
76.23%
114.7 hp		265/183
69.06%
136.3 hp		275/193
70.18%
141.4 hp
153.4 hp		-193.3/144.5
74.74%


Honda
Manufacturer /Part Number Port/Vol
Intake / Exhaust		 Valve Size Intake / Exhaust Combust. Chamber Volume .100"
Intake / Exhaust		 .200"
Intake / Exhaust		 .300"
Intake / Exhaust		 .400"
Intake / Exhaust		 .500"
Intake / Exhaust		 .600"
Intake / Exhaust		 .700"
Intake / Exhaust		 Average
Intake / Exhaust
XL125N/A-N/A36/39
108.3%		74/57
77.03%		86/63
73.26%		90/64
71.11%
23.19 hp		---71.55/55.80
77.97%
EX250N/A-N/A49/46
93.88%		86/76
88.37%		97/86
88.66%		99/90
90.91%
25.50 hp		---82.80/74.55
90.03%
750N/A-N/A--93/-100/-
102.9 hp		107/-
110.1 hp		--100.0


Volume numbers are in cc's. -- Flow numbers are in CFM.
These numbers have come from various magazines, web sites, and manufactures catalogs.
Most flow numbers for AFR - Air Flow Research heads come from their Web Site updated April '04.
Most flow numbers for BRODIX heads come from their '98 catalog. Web Site.
Most flow numbers for CANFIELD heads come from their Web Site June '03.
Most flow numbers for DART heads were from DART updated April '04. Web Site
Most flow numbers for EDELBROCK heads come from their Web Site. updated April '04
Most flow numbers for HRD ported heads come from their web site. March '04
Most flow numbers for INDY heads come from their Web Site. updated April '04
All flow numbers for KRE ported heads come from their web site. -- Kauffman Racing Equipment
All flow numbers for FLO Headworks ported heads come from their web site. June '03 -- and were converted from 10" to 28"
CCM - Means these numbers came from Car Craft Magazine Web Site.
CHP - Means these numbers came from Chevy High Performance Magazine Cylinder Head Database.
HPMM - Means these numbers came from High Performance Mopar Magazine Web Site.
MMM - Means these numbers came from Mopar Muscle Magazine Web Site.


Compliments of:
Stan Weiss
World Wide Enterprises
1306 Wells Street
Phila, PA 19111-4922

This page best viewed at 1024 x 768 or greater.


RPM of Peak Horse Power
CFMVolume for one Cylinder in Cubic Inches
5101520253035404550556065707580859095100
51111555.5370.3277.8222.2---------------
1022221111740.7555.5444.4370.3317.4277.8246.9222.2202.0---------
15333316671111833.3666.6555.5476.1416.6370.3333.3303.0277.8256.4238.1222.2208.3----
204444222214811111888.8740.7634.9555.5493.8444.4404.0370.3341.8317.4296.3277.8261.4246.9233.9222.2
2555552778185213891111925.8793.6694.4617.2555.5505.0462.9427.3396.8370.3347.2326.8308.6292.4277.8
30666633332222166713331111952.3833.3740.7666.6606.0555.5512.8476.1444.4416.6392.1370.3350.8333.3
357777388925921944155512961111972.1864.1777.7707.0648.1598.2555.5518.5486.1457.5432.1409.3388.9
4088884444296322221778148112701111987.6888.8808.0740.7683.7634.9592.5555.5522.8493.8467.8444.4
459999500033332500200016671428125011111000909.0833.3769.2714.2666.6624.9588.2555.5526.3500.0
50111105555370327782222185215871389123411111010925.8854.6793.6740.7694.4653.5617.2584.7555.5
551222161114074305524442037174615281358122211111018940.1872.9814.7763.8718.9678.9643.2611.1
6013332666644443333266622221905166714811333121211111026952.3888.8833.3784.2740.7701.7666.6
65144437222481436112889240720631805160514441313120411111032962.9902.7849.6802.4760.2722.2
701555477775185388931112592222219441728155514141296119611111037972.1914.9864.1818.6777.7
7516665833355554166333327782381208318521667151513891282119011111042980.3925.8877.1833.3
80177768888592544443555296325392222197517781616148113671270118511111046987.6935.6888.8
851888794446296472237773148269823612099188917171574145313491259118011111049994.1944.4
90199989999666650004000333328572500222220001818166715381428133312501176111110531000
952110910555703652774222351830162639234521111919175916241508140713191242117311111055
100-11110740755554444370331742778246922222020185217091587148113891307123411691111
105-11666777758334666388933332916259223332121194417951667155514581372129612281167
110-12221814761114888407434923055271624442222203718801746162915281438135812861222
115-12777851863885111425936503194283925552323212919661825170415971503142013451278
120-13332888866665333444438093333296326662424222220511905177816671568148114031333
125-13888925869445555462939683472308627782525231521371984185217361634154314621389
130-14443962972225777481441273611321028892626240722222063192618051699160515201444
135-14999999974995999500042853750333330002727250023072143200018751765166715791500
140-155541036977776222518544443889345631112828259223932222207419441830172816371555
145-161101074080556444537046034027358032222929268524782301214820141895179016961611
150-166651111083336666555547614166370333333030277825642381222220831961185217541667
155-172211148086106888574049204305382734443131287026492460229621532026191318131722
160-177761185188887110592550794444395035553232296327352539237022222091197518711778
165-183321222191667333611152384583407436663333305528202619244422912157203719301833
170-188871259194447555629653964722419737773434314829062698251823612222209919881889
175-194431296297217777648155554861432138893535324029912778259224302287216020471944
180-199981333299997999666657145000444440003636333330772857266625002353222221052000
185-2055413702102778221685158725138456741113737342631622936274025692418228421642055
190-2110914073105558444703660315277469142223838351832483016281526392483234522222111
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