AMA Supersport Racer
Join Date: Oct 2005
Location: Wichita, KS
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12.0:1 is pretty high compression. I am not saying that you should run premium, but I think that I'll stick to 91 or higher.
Most cars that run on regular unleaded are around the 9's in compression.
As several people have noted, octane does not give you horsepower and it is not a more potent fuel. In short, octane is a rating that tells you how much the fuel can be compressed before it ignites. When your fuel ignites from compression rather than the spark from the spark plug than you get detonation which can damage your engine. 87 being able to handle the least amount of compression before ignition, while 89 90 91 and higher are able to handle more compression.
Last edited by ADRENALINEJUNKY; 12-31-2005 at 12:58 PM.