I need to know what the best C/R would be for a B16A running 25psi @ the track only. And 10-15psi on the street. I will also have a complete stand alone system. Thanks for your help.

 

why do you want to run 25psi? You could probably run more boost and lower compression or less boost and higher compression for the same amount of power depending on what kind of response and spool-up you want. Also depends on what turbo you use.

what's more important is your horsepower goal!
i voted for 10:1 btw

-Xerxes

 

I only want to run 25 psi @ the track. Also the lower compression ratio the lower octane fuel you can run. The lower octane you run the more horsepower you get. And everybody know we can't afford to run on race fuel 7 days a week.
I was originally leaning towards 8.5:1 but I think I'm now going to go with 9.5:1. I still haven't made my final decision. Thanks for everyone's help.