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Combo 39.
Combo 39 comes from pages 87-93 of the Winter 2002 Camaro Performers.
Combo 39 uses a 391 stroker crank and Holley heads to make 453 HP and ft-lbs of torque. Some nice components are used in this combination.
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| Displacement: |
391 cu. in. (3.832 in. stroke) |
| Carburetor: |
Holley 770 vacuum secondary with both an open and holed spacer |
| Heads: |
Holley Street Avenger |
| Intake: |
Holley Street Avenger |
| Camshaft: |
Lunati hydraulic flat tappet, with 0.569/0.576 in. of lift and 245/255° of duration @ 0.050 in. lift |
| Rockers: |
Lunati aluminum roller, 1.6:1 |
| Pistons: |
JE forged |
| Rods: |
C.A.T. 4340 H-beam, 5.7 in. |
| Crank: |
C.A.T. 4340 forged steel (offset ground to make 3.832 in. stroke) |
| Comp. Ratio: |
10.25:1 |
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| MAX HP: |
453 @ 5800 |
| MAX Torque: |
453 @ 4200 |
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Combo 40.
Combos 40-43 come from allchevyengines.com.
Combo 40 uses the World Products S/R Torquer heads, a Performer RPM intake, and a moderate to high-performance camshaft. This combination produces 366 HP and 372 ft-lbs of torque.
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| Displacement: |
350 cu. in. |
| Heads: |
World Products S/R Torquer |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Crane Cams 278, with 278° of duration, 222° of duration @ 0.050 in. lift, and 0.470 in. lift |
| Rockers: |
Crane Cams Hi-Intensity roller |
| Pistons: |
TRW hypereutectic |
| Rods: |
Eagle forged |
| Crank: |
GM cast |
| Comp. Ratio: |
10.0:1 |
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| MAX HP: |
366 @ 5500 |
| MAX Torque: |
372 @ 4000 |
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Combo 41.
Combo 41 uses the same components from Combo 40 except the engine is 383 cu. in. and the intake is a regular Performer. Strangely, this combination makes 7 less HP than the previous example. Perhaps this can all be attributed to the RPM intake. The stroker engine does produce 39 more ft-lbs of torque, as is expected from the longer stroke.
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| Displacement: |
383 cu. in. |
| Heads: |
World Products S/R Torquer |
| Intake: |
Edelbrock Performer |
| Camshaft: |
Crane Cams 278, with 278° of duration, 222° of duration @ 0.050 in. lift, and 0.470 in. of lift |
| Pistons: |
TRW hypereutectic flat tops |
| Rods: |
Eagle forged |
| Crank: |
Elgin cast steel |
| Comp. Ratio: |
10.0:1 |
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| MAX HP: |
359 @ 5000 |
| MAX Torque: |
411 @ 3500 |
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Combo 42.
Combos 42 uses a 383 cu. in. engine with Sportsman II heads, a Performer RPM intake, and a more aggressive cam than Combo 41. This makes 55 more HP and 41 more ft-lbs of torque.
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| Displacement: |
383 cu. in. |
| Heads: |
World Products Sportsman II |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Crane Cams 284, with 284° of duration, 228° of duration @ 0.050 in. lift, and 0.488 in. of lift |
| Rockers: |
Crane Cams roller |
| Pistons: |
TRW hypereutectic |
| Rods: |
Eagle forged |
| Crank: |
Elgin cast steel |
| Comp. Ratio: |
10.0:1 |
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| MAX HP: |
414 @ 6000 |
| MAX Torque: |
452 @ 4500 |
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Combo 43.
Combo 43 uses even better heads than Combo 42, and a moderate roller cam is used. This combo makes 22 more HP and 4 less ft-lbs of torque.
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| Displacement: |
383 cu. in. |
| Heads: |
Dart Pro 1 aluminum, with 2.05/1.60 in. valves |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Comp Cams hydraulic roller, with 244° of duration @ 0.050 in. lift, and 0.525 in. of lift |
| Rockers: |
Crane aluminum roller |
| Pistons: |
TRW hypereutectic |
| Rods: |
Eagle forged |
| Crank: |
Elgin cast steel |
| Comp. Ratio: |
10.0:1 |
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| MAX HP: |
436 @ 5500 |
| MAX Torque: |
448 @ 4000 |
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Combo 44.
Combo 44 comes from page 3 of the August '98 small Summit catalog.
This engine is almost identical to Combo 19. Although less information is given, maybe this combo is still helpful. It uses a 383 cu. in. stroker engine with Trick Flow Twisted Wedge heads. The roller cam is just a little more aggressive than the cam in Combo 19.
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| Displacement: |
383 or 385 cu. in. |
| Heads: |
Trick Flow Specialties Twisted Wedge |
| Intake: |
Edelbrock Victor Jr. |
| Camshaft: |
Crane hydraulic roller, with 230/236° of duration @ 0.050 in. lift, and 0.510/0.520 in. lift |
| Rockers: |
Crane 1.5:1 aluminum roller |
| Pistons: |
KB Performance hypereutectic |
| Rods: |
5.7 in. |
| Crank: |
cast |
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| MAX HP: |
450 @ 5750 |
| MAX Torque: |
445 @ 4750 |
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Combo 45.
Combo 45 comes from pages 29-31 of Engines 2000.
Combo 45 uses a 383 cu. in. stroker engine with World Products S/R Torquer cylinder heads and a Comp Cams Xtreme Energy camshaft. Since the engine is built strictly as a torque-producing engine, the combination produces 338 HP and 426 ft-lbs of torque.
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| Displacement: |
383 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
World Products S/R Torquer, bowl blended |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Comp Cams Xtreme Energy, with 256/268° of duration, 212/218° of duration @ 0.050 in. lift, and 0.447/0.454 in. lift. (Corrected valve lift with 1.52:1 rockers is 0.453/0.460 in.) |
| Rockers: |
Comp Cams Magnum roller 1.52:1 |
| Pistons: |
cast |
| Rods: |
5.7 in. |
| Crank: |
SCAT cast |
| Distributor: |
MSD Pro Billet HEI |
| Timing: |
30° |
| Comp. Ratio: |
9.6:1 |
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| MAX HP: |
338 @ 4800 |
| MAX Torque: |
426 @ 3600 |
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Combo 46.
Combo 46 comes from pages 25-29 of the March 1990 issue of Hot Rod Magazine.
Combo 46 uses a 420 cu. in. stroker small block. In the article, this engine is to be used as a sleeper engine for a 1985 Monte Carlo SS. The ignition is computerized, but an engine without a computer could probably see similar results. This engine produces 425 HP and 446 ft-lbs.
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| Displacement: |
420 cu. in. |
| Carburetor: |
Reworked factory electronic Quadrajet |
| Heads: |
Dart II (180 cc intake runners and 2.02/1.60 in. valves), bowl-ported and blended, port-matched to the intake, 3-angle valve job |
| Intake: |
Reworked factory aluminum, port-matched to the heads |
| Camshaft: |
Comp Cams Magnum 280, with 280° of duration, 230° of duration @ 0.050 in. lift, with 0.480 in. lift. (Corrected valve lift with 1.6:1 rockers is 0.512 in.) |
| Rockers: |
Comp Cams Magnum roller 1.6:1 |
| Headers: |
Edelbrock tubular with a Turbo City Grand National dual-exhaust system |
| Pistons: |
JE forged alloy, 4.155 in. bore |
| Rods: |
Comp Cams Magnum 6 in. |
| Crank: |
Callies 4340 steel, 3.875 in. stroke |
| Comp. Ratio: |
9.0:1 |
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| MAX HP: |
425 @ 5500 |
| MAX Torque: |
446 @ 4500 |
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