
01-30-2008, 10:04 AM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Further details, the A/F was around 11.8 up to about 5000 rpm, then it rose to around 12.5. The original A/F with stock jetting was around 11.6 to 11.9. If put back to stock jetting, the motor made 580HP. Peak HP was at 5500 rpm. peak torque at 4500.
Thus, if I keep the modified jetting at 12.5 A/F, at least until I get to a chassis dyno, then the engine in theory should run fine on 91 octane CA gas?
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