Hopping up the 500 Cadillac
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We dyno'd the following 518 cid Cadillac engine. 10.5 to 1 compression, Hydraulic roller cam with 246* at .050 and .620 lift. Single pattern cam on a 112 + 2 LSA. CNC ported MTS aluminum heads and single plane intake. MTS 1.7 to 1 rockers and a Troy Patterson 1100 CFM 4150 carb. MTS ignition system | We dyno'd the following 518 cid Cadillac engine. 10.5 to 1 compression, Hydraulic roller cam with 246* at .050 and .620 lift. Single pattern cam on a 112 + 2 LSA. CNC ported MTS aluminum heads and single plane intake. MTS 1.7 to 1 rockers and a Troy Patterson 1100 CFM 4150 carb. MTS ignition system | ||
| − | Peak HP (620) occurred at 5200 RPM and peak torque (643) occurred at 4700 RPM. At 2600 RPM (the lowest rpm we could get a reading was 543 and by 2900 it was 575 and even at 5400 RPM was still at 590.9. That's a pretty flat torque "curve". The average torque from 2600 rpm to 5300 was 606.6 | + | Peak HP (620) occurred at 5200 RPM and peak torque (643) occurred at 4700 RPM. At 2600 RPM (the lowest rpm we could get a reading)torque was 543 and by 2900 it was 575 and even at 5400 RPM was still at 590.9. That's a pretty flat torque "curve". The average torque from 2600 rpm to 5300 was 606.6 |
Another note is the engine was run on 89 octane fuel. Timing was set at 30* btdc where prior engines run on 93 liked about 6* more. | Another note is the engine was run on 89 octane fuel. Timing was set at 30* btdc where prior engines run on 93 liked about 6* more. | ||
As you can see the peak HP at 5200 shows how small a big inch Cadillac with good air flow makes a cam act. This engine would also idle at 600 prm. | As you can see the peak HP at 5200 shows how small a big inch Cadillac with good air flow makes a cam act. This engine would also idle at 600 prm. | ||
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