383 Chevy Comparing Combinations

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GM HEADS

GM #441 castings, 76cc chambers, 2.02/1.60 in. valves, pocket ported

Comp Cams 280° Magnum hydraulic, 230/230° @ 0.050 in. 0.480/0.480 in. lift

Comp. Ratio: 9.3:1

Edelbrock Performer Manifold

MAX HP: 382 @ 5300 MAX Torque: 400 @ 4500

 

GM #441 castings, 76cc chambers, 2.02/1.60 in. valves, pocket ported

Comp Cams 292° Magnum hydraulic, 244/244° @ 0.050 in. 0.501/0.501 in. lift

Comp. Ratio: 9.3:1

Edelbrock Performer Manifold

MAX HP: 399 @ 5700 MAX Torque: 399 @ 5000

 

GM #441 castings, 76cc chambers, 2.02/1.60 in. valves, pocket ported

Intake: . Camshaft: Comp Cams 280° 230/230° @ 0.050 in. 0.480/0.480 in. lift

Edelbrock Victor Jr Manifold Comp. Ratio: 9.3:1

MAX HP: 400 @ 5700 MAX Torque: 403 @ 4500 and 5000

 

GM #441 castings, 76cc chambers, 2.02/1.60 in. valves, pocket ported

Comp Cams 292° Magnum hydraulic, 244/244° @ 0.050 in. 0.501/0.501 in. lift

Comp. Ratio: 9.3:1

Edelbrock Victor Jr Manifold

MAX HP: Over 420 MAX Torque: Over 400

 

GM castings, ported, with 2.05/1.60 in. valves and a 3-angle valve job

GM #141 mechanical 256/268° @ 0.050 in. 0.469/0.483 in. lift

Comp. Ratio: 10.0:1

Edelbrock Performer RPM and a 1 in. open-plenum spacer

MAX HP: 510 @ 5600 MAX Torque: 481 @ 5300

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Air Flow Research

Air Flow Research 195cc Street

Air Flow Research hydraulic, 218/223° @ 0.050 in. 0.460/0.470 in. lift

Comp. Ratio: 9.0:1

Air Flow Research FloPower RPM Manifold

MAX HP: 440 @ 5000 MAX Torque: 470 @ 3500

 

Air Flow Research 190cc Street

Comp Cams 280° Magnum hydraulic, 230° @ 0.050 0.480 in. lift

Comp. Ratio: 9.5:1

Air Flow Research FloPower RPM Manifold

MAX HP: 471 @ 5500 MAX Torque: 515 @ 4500

 

Air Flow Research 190cc Street

Comp Cams hydraulic roller, 230/236° @ 0.050 in. 0.510/0.520 in. lift

Comp. Ratio: 9.5:1

Air Flow Research FloPower RPM Manifold

MAX HP: 491 @ 5500 MAX Torque: 501 @ 4000

 

Air Flow Research 190cc Street

Comp Cams hydraulic roller, 236/242° @ 0.050 in. 0.520/0.540 in. lift

Comp. Ratio: 9.5:1

Air Flow Research FloPower RPM Manifold

MAX HP: 503 @ 5500 MAX Torque: 517 @ 4500

 

Air Flow Research 190, CNC porting, and extra hand-porting

Comp Cams hydraulic roller, 235/242° @ 0.050 in. 0.592/0.614 in. lift

Comp. Ratio: 9.4:1

Edelbrock Performer RPM Manifold

MAX HP: 525 @ 5800 MAX Torque: 535 @ 4200

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Brodix

Brodix -8

Crane hydraulic roller 278, 222° @ 0.050 in. 0.470 in. of lift

Comp. Ratio: 10:1

Edelbrock Performer Manifold

MAX HP: 431 @ 5500 MAX Torque: 452 @ 4000

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Dart Iron Eagle

Dart Iron Eagle

Comp Cams hydraulic roller, 230/236° @ 0.050 in. 0.510/0.520 in. lift

Comp. Ratio: 10.0:1

Edelbrock Victor Jr Manifold

MAX HP: 446 @ 5500 MAX Torque: 433 @ 4500

 

Dart Pro 1 aluminum, with 2.05/1.60 in. valves

Comp Cams hydraulic roller, 244° @ 0.050 in. 0.525 in. of lift

Comp. Ratio: 10.0:1

Edelbrock Performer RPM Manifold

MAX HP: 436 @ 5500 MAX Torque: 448 @ 4000

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TRICK FLOW

Trick Flow 23° Street

Comp Cams hydraulic roller, 230/236° @ 0.050 in. 0.510/0.520 in. lift

Comp. Ratio: 10.0:1

Edelbrock Victor Jr Manifold

MAX HP: 460 @ 6000 MAX Torque: 451 @ 5000

 

Trick Flow Specialties Twisted Wedge

Crane hydraulic roller, 214/222° @ 0.050 in. 0.488/0.510 in. lift

Comp. Ratio: 9.8:1

Edelbrock Victor Jr., ported Manifold

MAX HP: 451 @ 6000 MAX Torque: 445 @ 4500

 

Trick Flow Specialties Twisted Wedge

Crane hydraulic roller, 230/236° @ 0.050 in. 0.510/0.512 in. lift.

Comp. Ratio: 9:1 to 10:1

Edelbrock Victor Jr Manifold

MAX HP: 450 @ 5750 MAX Torque: 445 @ 4750

 

Trick Flow Specialties Twisted Wedge

Crane hydraulic roller, 230/236° @ 0.050 in. 0.510/0.520 in. lift

MAX HP: 450 @ 5750 MAX Torque: 445 @ 4750

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World Products

World Products S/R Torquer

Crane Cams 278, 222° @ 0.050 in. 0.470 in. of lift

Comp. Ratio: 10.0:1

Edelbrock Performer Manifold

MAX HP: 359 @ 5000 MAX Torque: 411 @ 3500

 

World Products S/R Torquer, bowl blended

Comp Cams Xtreme Energy, 212/218° @ 0.050 in. 0.453/0.460 in. lift.

Comp. Ratio: 9.6:1

Edelbrock Performer Manifold

MAX HP: 338 @ 4800 MAX Torque: 426 @ 3600

 

World Products Sportsman II

Comp Cams hydraulic roller, 230/236° @ 0.050 in. 0.510/0.520 in. lift

Comp. Ratio: 10.0:1

Edelbrock Victor Jr Manifold

MAX HP: 422 @ 5500 MAX Torque: 426 @ 4500

 

World Products Sportsman II

Crane Cams 284, 228° @ 0.050 in. 0.488 in. of lift

Comp. Ratio: 10.0:1

Edelbrock Performer RPM Manifold

MAX HP: 414 @ 6000 MAX Torque: 452 @ 4500