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Combo 9.
Combo 9 exchanges the Trick Flow heads from Combo 8 for the World Products Sportsman II's. This results in a horsepower loss of 38 HP and 25 ft-lbs of torque. However, the power level is still very respectable.
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|
| Displacement: |
383 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
World Products Sportsman II |
| Intake: |
Edelbrock Victor Jr. |
| Camshaft: |
Comp Cams hydraulic roller, with 230/236° of duration @ 0.050 in. lift, and 0.510/0.520 in. lift |
| Rockers: |
Trick Flow roller, 1.5:1 |
| Headers: |
1 3/4 in. primaries, with 3 in. exhaust and Flowmaster mufflers |
| Pistons: |
KB hypereutectic, 12 cc dish |
| Rods: |
Trick Flow forged, 5.7 in. |
| Crank: |
Trick Flow forged |
| Distributor: |
MSD Billet with 6AL ignition |
| Comp. Ratio: |
10.0:1 |
|
|
| MAX HP: |
422 @ 5500 |
| MAX Torque: |
426 @ 4500 |
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Combo 10.
Combo 10 uses Dart Iron Eagles instead of Sportsman II's. The swap produces 24 more HP and 7 more ft-lbs of torque than the Sportsman II's. The Iron Eagles also made 14 less HP and 18 less ft-lbs of torque than the Trick Flow 23° heads. We can see that the Dart heads are clearly better than the World Products heads.
| |
| Displacement: |
383 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Dart Iron Eagle |
| Intake: |
Edelbrock Victor Jr. |
| Camshaft: |
Comp Cams hydraulic roller, with 230/236° of duration @ 0.050 in. lift, and 0.510/0.520 in. lift |
| Rockers: |
Trick Flow roller, 1.5:1 |
| Headers: |
1 3/4 in. primaries, with 3 in. exhaust and Flowmaster mufflers |
| Pistons: |
KB hypereutectic, 12 cc dish |
| Rods: |
Trick Flow forged, 5.7 in. |
| Crank: |
Trick Flow forged |
| Distributor: |
MSD Billet with 6AL ignition |
| Comp. Ratio: |
10.0:1 |
|
|
| MAX HP: |
446 @ 5500 |
| MAX Torque: |
433 @ 4500 |
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Combo 11.
Combos 11-17 come from the Air Flow Research (AFR) web site. Not all of the engine combinations are done on the same test block, but all have similar characteristics. AFR heads cost about $1,200/pair assembled, and a lot of the head work is done by CNC machines.
Combo 11 uses a 383 cu. in. engine with a small 600 cfm carb, AFR 195 cc Street heads, and a moderate to high-performance hydraulic camshaft. The combination produces 440 HP at 5000 RPM and an excellent 470 ft-lbs of torque at a very streetable 3500 RPM. This is one of my favorite combos.
| |
| Displacement: |
383 cu. in. |
| Carburetor: |
Holley 600 cfm |
| Heads: |
Air Flow Research 195cc Street |
| Intake: |
Air Flow Research FloPower RPM |
| Camshaft: |
Air Flow Research hydraulic, with 218/223° of duration @ 0.050 in. lift, and 0.460/0.470 in. lift |
| Headers: |
1 5/8 in. |
| Comp. Ratio: |
9.0:1 |
|
|
| MAX HP: |
440 @ 5000 |
| MAX Torque: |
470 @ 3500 |
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Combo 12.
Combo 12 uses the exact same setup as Combo 11, except on a 350 cu. in. engine. This engine makes great HP and torque also.
| |
| Displacement: |
350 cu. in. |
| Carburetor: |
Holley 600 cfm |
| Heads: |
Air Flow Research 195cc Street |
| Intake: |
Air Flow Research FloPower RPM |
| Camshaft: |
Air Flow Research hydraulic, with 218/223° of duration @ 0.050 in. lift, and 0.460/0.470 in. lift |
| Headers: |
1 5/8 in. |
| Comp. Ratio: |
9.0:1 |
|
|
| MAX HP: |
420 @ 5000 |
| MAX Torque: |
435 @ 3800 |
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Combo 13.
Combo 13 is close to Combo 12, but it uses the 190cc Street heads instead of the 195cc version. These heads are supposed to be better suited to the smaller 350 cu. in. small block. Notice that the 270° Magnum is very close to the cam in Combo 12. Perhaps the reason for the power and torque increase is the larger 750 cfm double pumper and extra half-point of compression.
| |
| Displacement: |
355 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Air Flow Research 190cc Street |
| Intake: |
Air Flow Research FloPower RPM |
| Camshaft: |
Comp Cams 270° Magnum hydraulic, with 270° of duration, 224° of duration @ 0.050 in. lift, and 0.470 in. lift |
| Headers: |
1 5/8 in. |
| Distributor: |
MSD |
| Timing: |
34° |
| Comp. Ratio: |
9.5:1 |
|
|
| MAX HP: |
430 @ 5000 |
| MAX Torque: |
470 @ 4500 |
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Combo 14.
Combo 14 uses the same parts as Combo 13, but a hydraulic roller camshaft is used. The result is 20 more HP with the same amount of torque.
| |
| Displacement: |
355 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Air Flow Research 190cc Street |
| Intake: |
Air Flow Research FloPower RPM |
| Camshaft: |
Comp Cams hydraulic roller, with 230/236° of duration @ 0.050 in. lift, and 0.510/0.520 in. lift |
| Headers: |
1 5/8 in. |
| Distributor: |
MSD |
| Timing: |
36° |
| Comp. Ratio: |
9.5:1 |
|
|
| MAX HP: |
450 @ 5500 |
| MAX Torque: |
470 @ 4500 |
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|
Combo 15.
Combo 15 uses a 383 cu. in. engine with 9.5:1 compression and a 750 double pumper. With a 280° hydraulic camshaft and the AFR 190cc Street heads, this combination makes an awesome 471 HP and an incredible 515 ft-lbs of torque. This is the ultimate street engine.
| |
| Displacement: |
383 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Air Flow Research 190cc Street |
| Intake: |
Air Flow Research FloPower RPM |
| Camshaft: |
Comp Cams 280° Magnum hydraulic, with 280° of duration, 230° of duration @ 0.050 in. lift, and 0.480 in. lift |
| Headers: |
1 3/4 in. |
| Distributor: |
MSD |
| Timing: |
34° |
| Comp. Ratio: |
9.5:1 |
|
|
| MAX HP: |
471 @ 5500 |
| MAX Torque: |
515 @ 4500 |
|
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|
Combo 16.
Combo 16 uses the same parts as Combo 15, but with a hydraulic roller camshaft. The awesome 500 HP/ 500 ft-lb mark is almost reached. This is an awesome street engine also.
| |
| Displacement: |
383 cu. in. |
| Carburetor: |
Holley 750 double pumper |
| Heads: |
Air Flow Research 190cc Street |
| Intake: |
Air Flow Research FloPower RPM |
| Camshaft: |
Comp Cams hydraulic roller, with 230/236° of duration @ 0.050 in. lift, and 0.510/0.520 in. lift |
| Headers: |
1 3/4 in. |
| Distributor: |
MSD |
| Timing: |
36° |
| Comp. Ratio: |
9.5:1 |
|
|
| MAX HP: |
491 @ 5500 |
| MAX Torque: |
501 @ 4000 |
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