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383 Chevy Engine - The Ultimate 'Stick
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Comp Cams offers more lobe... Comp Cams offers more lobe profiles than just about any other camshaft manufacture today. We dreamed the dream and Comp supplied it: the perfect 383ci camshaft. Single-Pattern | Group #1 | | PN | NA | | Grind | 3311S/3311SHR110 | | Intake valve lift | 0.480 inch | | Exhaust valve lift | 0.480 inch | | Intake duration at 0.050-inch lift | 206 degrees | | Exhaust duration at 0.050-inch lift | 206 degrees | | LSA | 110 | | Intake valve opening | -3 | | Intake valve closing | 29 | | Exhaust valve opening | 37 | | Exhaust valve closing | -11 | | Cranking compression | 220 psi | | Idle vacuum at 900 rpm | 16.5 inches | | Peak torque | 495 | | Peak horsepower | 442 | | Average torque at 2,500-5,700 rpm | 466 | | Average horsepower at 2,500-5,700 rpm | 362 | | RPM | TQ | HP | | 2,500 | 447 | 213 | | 3,000 | 462 | 264 | | 3,500 | 493 | 328 | | 3,700 | 495 | 348 | | 4,000 | 492 | 375 | | 4,500 | 484 | 415 | | 5,000 | 460 | 438 | | 5,300 | 438 | 442 | | 5,500 | 420 | 440 | | 5,700 | 402 | 437 | | Group #2 | | PN | NA | | Grind | 33145S/33145SHR110 | | Intake valve lift | 0.502 inch | | Exhaust valve lift | 0.502 inch | | Intake duration at 0.050-inch lift | 224 degrees | | Exhaust duration at 0.050-inch lift | 224 degrees | | LSA | 110 | | Intake valve opening | 6 | | Intake valve closing | 38 | | Exhaust valve opening | 46 | | Exhaust valve closing | -2 | | Cranking compression | 190 psi | | Idle vacuum at 900 rpm | 14.5 inches | | Peak torque | 488 | | Peak horsepower | 454 | | Average torque at 2,500-6,000 rpm | 453 | | Average horsepower at 2,500-6,000 rpm | 365 | | RPM | TQ | HP | | 2,500 | 431 | 205 | | 3,000 | 445 | 254 | | 3,500 | 478 | 318 | | 4,000 | 488 | 371 | | 4,500 | 484 | 415 | | 5,000 | 463 | 440 | | 5,500 | 433 | 454 | | 6,000 | 357 | 408 | | 6,300 | NA | NA | | Group #3 | | PN | N/A | | Grind | 3317S/3317SHR110 | | Intake valve lift | 0.540 inch | | Exhaust valve lift | 0.540 inch | | Intake duration at 0.050-inch lift | 242 degrees | | Exhaust duration at 0.050-inch lift | 242 degrees | | LSA | 110 | | Intake valve opening | 15 | | Intake valve closing | 47 | | Exhaust valve opening | 55 | | Exhaust valve closing | 7 | | Cranking compression | 190 psi | | Idle vacuum at 900 rpm | 9.0 inches | | Peak torque | 497 | | Peak horsepower | 498 | | Average torque at 2,500-6,300 rpm | 461 | | Average horsepower at 2,500-6,300 rpm | 392 | | | | RPM | TQ | HP | | 2,500 | 405 | 200 | | 3,000 | 410 | 234 | | 3,500 | 464 | 310 | | 4,000 | 490 | 373 | | 4,500 | 497 | 426 | | 5,000 | 491 | 468 | | 5,500 | 469 | 492 | | 6,000 | 436 | 498 | | 6,300 | 404 | 485 | Final Verdict Big cams make high-rpm power-but at the expense of low idle vacuum and poor street drivability. Small cams trade a bit of that high-end power but offer good street manners, while providing enough low-rpm torque to hang with even the biggest beast on the streets. In the end it all comes down to a trade-off between drivability and balls-out high-performance power.
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ARP
531 Spectrum Circle
Oxnard
CA
93030
805-278-7223
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Hedman Hedders
16410 Manning Way
Cerritos
CA
90701
310-921-0404
www.hedman.com
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MSD
El Paso
TX
79936
915-857-5200
www.msdignition.com
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Holley Performance Products
1801 Russellville Rd.
Bowling Green, KY 42101
KY
42101
270-782-2900
www.holley.com
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Barry Grant Inc.
1450 McDonald Road,
Dept. MMFF
Dahlonega
GA
30533
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Milodon Inc
20716 Plummer St
Chatsworth
CA
91311
818-407-1211
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COMP Cams
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Pertronix
440 E. Arrow Hwy.
San Dimas
CA
91773
800-827-3758
www.pertronix.com
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Edelbrock
Dept. 5.0
2700 California St.
Torrance
CA
90503
310-781-2222
www.edelbrock.com
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SA Engine Design
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Fel Pro Performance Products
5555 Garden Grove Blvd., Dept. CHP
Westminster
CA
92683
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Trick Flow Specialties (TFS)
1248 Southeast Ave.
Tallmadge
OH
44278
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Flowmaster
8-00/-544-4761
www.flowmastermufflers.com
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Toilet Training
Despite the overwhelming influx of EFI, the carburetor (sometimes referred to as the "toilet")...
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