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Combo 93.
Combo 93 comes from pages 82-85 of the August 2001 issue of Car Craft.
Combo 93 is a GM ZZ4 350 cu. in. engine that has a mechanical roller cam and AFR 195 heads. This potent combo puts out 523 HP and 454 ft-lbs of torque. Awesome for the street.
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| Displacement: |
350 cu. in. |
| Carburetor: |
Speed Demon 850, with a 1 in. open spacer |
| Heads: |
Air Flow Research 195, with 2.02/1.60 in. valves. |
| Intake: |
Edelbrock Victor Jr. |
| Camshaft: |
Comp Cams mechanical roller, with 0.578/0.584 in. of lift (with 1.52:1 rockers) and 242°/248° of duration @ 0.050 in. of lift. |
| Rockers: |
Comp Cams Pro Magnum roller, 1.52:1 |
| Exhaust: |
1 3/4 in. headers with 3 in. Flowmasters |
| Pistons: |
GM high-silicon aluminum |
| Rods: |
stock |
| Crank: |
GM forged |
| Distributor: |
GM HEI |
| Timing: |
35° |
| Comp. Ratio: |
9.97:1 |
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| MAX HP: |
523 @ 6600 |
| MAX Torque: |
454 @ 5200 |
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Combo 94.
Combos 94-97 come from pages 40-46 of the April 1998 issue of Super Chevy Magazine. They all use the same ZZ4 crate motor with AFR 190 heads. Hydraulic cams are varied from an economical grind up to a cam with more than 0.500 in. of lift. When compared to the 523 horse build-up above, these 4 combos have a smaller carb, a lower-RPM intake, and a smaller cam.
Combo 94 has a cam with only 0.431 in. of lift and 252° of duration (206° @ 0.050 in. of lift). This build only produces 348 HP and 398 ft-lbs of torque.
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| Displacement: |
350 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Air Flow Research 190, with 2.02/1.60 in. valves |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Comp Cams High Energy hydraulic, with 252° of duration, 206° of duration @ 0.050 in. of lift, and 0.425 in. of lift (Corrected valve lift with 1.52:1 rockers is 0.431 in.). |
| Rockers: |
Comp Cams Pro Magnum roller, 1.52:1 |
| Exhaust: |
1 3/4 in. Hooker headers with 3 in. Flowmasters |
| Pistons: |
GM high-silicon aluminum |
| Rods: |
stock |
| Crank: |
GM forged |
| Ignition: |
Mallory distributor with an MSD 6AL box |
| Timing: |
36° |
| Comp. Ratio: |
9.5:1 |
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| MAX HP: |
348 @ 5000 |
| MAX Torque: |
398 @ 3800 |
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Combo 95.
Combo 95 improves upon the former build by using a moderate High Energy cam with 0.460 in. of lift and 268° of duration (218° @ 0.050 in. of lift). The result is 380 horses and 402 ft-lbs of torque.
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| Displacement: |
350 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Air Flow Research 190, with 2.02/1.60 in. valves |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Comp Cams High Energy hydraulic, with 268° of duration, 218° of duration @ 0.050 in. of lift, and 0.454 in. of lift (Corrected valve lift with 1.52:1 rockers is 0.460 in.). |
| Rockers: |
Comp Cams Pro Magnum roller, 1.52:1 |
| Exhaust: |
1 3/4 in. Hooker headers with 3 in. Flowmasters |
| Pistons: |
GM high-silicon aluminum |
| Rods: |
stock |
| Crank: |
GM forged |
| Ignition: |
Mallory distributor with an MSD 6AL box |
| Timing: |
36° |
| Comp. Ratio: |
9.5:1 |
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| MAX HP: |
380 @ 5400 |
| MAX Torque: |
402 @ 4100 |
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Combo 96.
Combo 96 uses a Comp Cams Magnum cam with 0.486 in. of lift and 280° of duration (230° @ 0.050 in. of lift). A respectable 404 HP and 403 ft-lbs of torque are made.
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| Displacement: |
350 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Air Flow Research 190, with 2.02/1.60 in. valves |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Comp Cams Magnum hydraulic, with 280° of duration, 230° of duration @ 0.050 in. of lift, and 0.480 in. of lift (Corrected valve lift with 1.52:1 rockers is 0.486 in.). |
| Rockers: |
Comp Cams Pro Magnum roller, 1.52:1 |
| Exhaust: |
1 3/4 in. Hooker headers with 3 in. Flowmasters |
| Pistons: |
GM high-silicon aluminum |
| Rods: |
stock |
| Crank: |
GM forged |
| Ignition: |
Mallory distributor with an MSD 6AL box |
| Timing: |
36° |
| Comp. Ratio: |
9.5:1 |
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| MAX HP: |
404 @ 5600 |
| MAX Torque: |
403 @ 4400 |
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Combo 97.
Combo 97 upgrades to a larger Magnum camshaft. It has 0.507 in. of lift and 292° of duration (244° @ 0.050 in. of lift). 431 HP and 400 ft-lbs are produced.
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| Displacement: |
350 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Air Flow Research 190, with 2.02/1.60 in. valves |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Comp Cams Magnum hydraulic, with 292° of duration, 244° of duration @ 0.050 in. of lift, and 0.501 in. of lift (Corrected valve lift with 1.52:1 rockers is 0.507 in.). |
| Rockers: |
Comp Cams Pro Magnum roller, 1.52:1 |
| Exhaust: |
1 3/4 in. Hooker headers with 3 in. Flowmasters |
| Pistons: |
GM high-silicon aluminum |
| Rods: |
stock |
| Crank: |
GM forged |
| Ignition: |
Mallory distributor with an MSD 6AL box |
| Timing: |
36° |
| Comp. Ratio: |
9.5:1 |
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| MAX HP: |
431 @ 6700 |
| MAX Torque: |
400 @ 4500 |
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Combo 98.
Combos 98-102 come from pages 23-30 of the September 2001 issue of Chevy High Performance. Each of the 5 engines is a different build-up that makes more power than its predecessor.
Combo 98 uses World Products S/R Torquers and a smaller camshaft to produce 330 HP and 410 ft-lbs.
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| Displacement: |
355 cu. in. |
| Carburetor: |
Holley 750 |
| Heads: |
World Products S/R Torquer, with 2.02/1.60 in. valves |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Comp Cams Xtreme Energy hydraulic, with 250/260° of duration, 206/212° of duration @ 0.050 in. of lift, and 0.432/0.444 in. of lift. |
| Headers: |
1 5/8 in. |
| Comp. Ratio: |
9.25:1 |
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| MAX HP: |
330 @ 5000 |
| MAX Torque: |
410 @ 3500 |
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Combo 99.
Combo 99 uses Vortec heads and a bigger cam than Combo 98. The heads are pocket ported, and this helps the engine to make 409 HP and 427 ft-lbs of torque. The torque peak occurs at 3500 RPM, but the power peak is at 6000 RPM. The torque peak is only at 58% of the power peak, instead of the normal 70-80%.
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| Displacement: |
350 cu. in. |
| Carburetor: |
Holley 750 double-pumper |
| Heads: |
GM L31 Vortecs, pocket-ported, with 1.94/1.50 in. valves |
| Intake: |
Edelbrock Performer RPM Vortec |
| Camshaft: |
Comp Cams Xtreme Energy 268 hydraulic, with 0.478/0.480 in. of lift and 224/230° of duration @ 0.050 in. of lift. |
| Exhaust: |
Hedman 1 5/8 in. headers and Borla XR-1 mufflers |
| Distributor: |
HEI |
| Comp. Ratio: |
9.4:1 |
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| MAX HP: |
409 @ 6000 |
| MAX Torque: |
427 @ 3500 |
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Combo 100.
Combo 100 is a 383 cu. in. engine with 10:1 compression and Trick Flow 23° heads. The Comp Cams mechanical street roller cam allows this mule to make 454 HP and 469 ft-lbs of torque. A 383 cu. in. engine with high-flowing heads and a massive cam should not use 1 5/8 in. headers like this combination. With 1 3/4 in. headers, the previously restricted engine would have produced more power and torque.
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| Displacement: |
383 cu. in. |
| Carburetor: |
Holley 750 double-pumper |
| Heads: |
Trick Flow 23° aluminum |
| Intake: |
Edelbrock Performer RPM |
| Camshaft: |
Comp Cams mechanical street roller, with 0.570/0.576 in. of lift and 242/248° of duration @ 0.050 in. of lift. |
| Exhaust: |
Hedman 1 5/8 in. headers and Borla ZR-1 mufflers |
| Pistons: |
SRP forged |
| Rods: |
SCAT |
| Crank: |
SCAT |
| Ignition: |
Crane HI-6 |
| Comp. Ratio: |
10:1 |
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| MAX HP: |
454 @ 6000 |
| MAX Torque: |
469 @ 4000 |
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