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Unfortunately the power increase vs boost pressure equation isn't linear. The more boost you add, the less you gain per pound of boost added. I went from 10 psi of boost to 18 psi of boost - and on my combo it only gained roughly 100 hp.




WOW...

I dyno 520 RWHP at 8 lbs boost and 690 at 14 lbs boost. On my set-up i'm not dropping off at all, however haven't pushed it to 18 lbs boost either... yet :-)