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LOL! I'm not a professional! I do porn, not cars. (FYI) Compression is the amount of pressure the combustion chambers are under. The octane level changes the speed and cleanliness
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01-30-2009, 03:14 PM
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A True Z Fanatic
Join Date: Dec 2008
Location: Los Angeles
Posts: 1,853
Drives: 02 Corvette Z06
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LOL! I'm not a professional!
 I do porn, not cars. (FYI)Compression is the amount of pressure the combustion chambers are under. The octane level changes the speed and cleanliness of the detonation. Pre-detonation is common on higher compression engine because the fuel will ignite easier. So higher octanes are required to guarantee a specific time for detonation AFTER the piston has reached its apex. Read this: Engine knocking - Wikipedia, the free encyclopedia <-- That will explain the pre-detonation and let you know why higher octanes are more important on cars with higher compressions.
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