gotta_goatsfast Posted May 13, 2011 Report Posted May 13, 2011 I just laugh and shake my head, whenever someone says "if you don't have 160-170psi or so, you don't need race gas." DO NOT use compression gauge readings, dictate what octane fuel to run. A compression gauge is simply a tool used to measure cranking compression. You need to know UCCR and CCR of motor to accurately know what fuel to run. I don't know why this compression thing ain't a sticky or something?? It should be, so people simply stop using their harbor freight compression tester to dictate the octane requirements of their motors. But surely a stock port engine with 160psi requires more octane than a drag port with 150psi. Quote
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