What is the max compression you can run with 93 octane

I know there are alot of factors involved in regards to running 93 octane with a high compression piston, i.e. cam timing or cam bleed off, chamber design, etc. But to use a stock motor for a starting place, can you run 13.5 comp. piston with 93 octane?

It all depends on what cam you have and what fuel. I assume you are talking about pump gas... you can run 13.5:1 with pump gas with no problems. Ron is running 14.5:1 with an aggresive cam with VP U4 which is 94 octane... I would not run 14.5:1 with premium though.

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