Maximum Compression Ratio

Duster said
Maybe I should be looking at max compression pressure which depend where the intake valve close? I'm curious of the maximum(safe) dynamic compression a gas engine can be build on 91 octane gasoline without having premature detonation. Thank you.
Robert

Contact AJFourms. he is good with the math thing. Even better if you know the cam and it's specs.

Dan Stratton said
also you can retard timing a few degrees

I hate when I have to do that since I'm also taking power out of the engine and a gd amount is allways found in a few degrees. BUT, if it makes it drivable....in a pinch, I'll do it.

Hey Dan, I'm interested in the combo specs by the way.