Editing Hopping up the 500 Cadillac (section)
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==Another example== The following dyno results were from a 518 cid Cadillac engine. 10.5 to 1 compression, hydraulic roller cam with 246 degrees duration at 0.050" and 0.620" lift. Single pattern cam on a 112 degree + 2 degree 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 a reading could be obtained), torque was 543 and by 2900 it was 575 and at 5400 RPM was at 590.9. That's a pretty flat torque "curve". The average torque from 2600 rpm to 5300 was 606.6. This engine was run on 89 octane fuel. Timing was set at 30 degrees btdc where prior engines run on 93 liked about 6* more. This engine would also idle at 600 rpm.
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