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Hello. I am new to the forum and was wondering if there is a general "rule of thumb" to use regarding the limitations of timing and compression on a shee before running fuel greater than 91 octane. Any input is greatly appreciated. Thanks!

Posted

Hello. I am new to the forum and was wondering if there is a general "rule of thumb" to use regarding the limitations of timing and compression on a shee before running fuel greater than 91 octane. Any input is greatly appreciated. Thanks!

 

Welcome to BHQ!

 

I'm no expert on this topic, but I've always been told once you get about 165ish on compression is when you atleast need 50/50 fuel. As for timing, the majority of guys run +4 safely.

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