[billwot]

Originally Posted by ft_sjo

First google result: http://cochise.uia.net/pkelley2/DynamicCR.html

I'm not qualified to comment, it's a very complex subject and none of us will have the source data required to calculate it.

Actually, its very simple.

Final Compression Ratio (FCR) = (Boost / 14.7) + 1) x CR
Boost = Maximum Boost
14.7 = Psi. at Sea Level
CR = Engine Static Compression Ratio

http://www.xcceleration.com/cr-boost%20101.htm



And here's a calculator to make it even more simple:

http://www.gtsparkplugs.com/Effectiv...ssionCalc.html