I was wondering if there is some sort of ratio for boost to HP. I mean is 0ne pound of boost equal to 10HP? Does anyone know? I'm trying to figure out how much power I'm making with 12psi and all the bolt-ons you see below.

 

I believe every additional 15 lbs boost will double your H.P. e.g. 250HP with 10 lbs.- If you go the 15 lbs -5 lbs more or 33% more HP--
(5 divided by 15) + 83 HP 333 HP Total.
@ 12 lbs, 2/15=.13% more or 32 HP. Naturally, engine components must be altered/added accordingly.

 

Such a ratio would be nonlinear and multi-variable depending on mods(plus there's ECU/maps and other factors) So, there really is no exact answer anyone can make that would apply for all cars. Having said that, I've seen a car with all bolt-ons make an addtl ~15hp per pound of boost going from 10-12psi and ~10hp per pound of boost going from 12-14psi.

Since your car would have less efficiencies(such as no IC), ~10hp for going from 10-12 psi would be a fair approximation. Adding more boost will not always guarantee more hp.