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when running a turbo set-up; about how many horses to you get per pound of boost or does it depend on how much boost your running? (i.e. running 10lbs yeilding 4 hp per pound of boost to running 20lbs yeilding 7 hp per pound of boost)

no there isn't because all turbos are different....but there might be a possibility on an average hp per lb of boost ratio...however it won't be accurate.

Figure, there is ~14.7PSI in your cylindars (at sea level) on a NA engine. Think about it this way. If you were to get 50% more air (.5 BAR) and gas in your cylinders, you should get 50% more power. <P>The way I usually figure it, is divide yur boost (i.e. 8PSI) by Barometric pressure (14.7), getting the percentage of extra air above barometric, that you are puttin into your engine. In this case it would be .544 = 54.4%. That should yeild about 54% more power. Now you have to realize you will NEVER get this percentage of increase. That would mean that was a 100% efficient system, and if you derived that system, you would be a rich man. Most turbo systems are around 75% efficient. So you could possible take the extra power (54% on a GS would be ~70HP) and devide it by 75% (52HP) and that would be reasonable to expect that if you have all your other systems (i.e. fuel, ignition, electrical, etc) are ok. Hope this helps a little.<P>Also, go buy Maximum Boost by Corky Bell. You will be pleased.

it also depends on flow. if your turbo/piping/intake/head flow well. 10psi could get you more power than 13 on a restrictive setup.