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hp per psi??

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Old Jul 5, 2005, 10:34 AM
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hp per psi??

how much hp gain per psi over stock 19psi? (on 93 octane)
thanks
Old Jul 5, 2005, 10:54 AM
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Depends on a lot of things.. you could even lose power if it produces knock and pulls timing.
Old Jul 5, 2005, 11:35 AM
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well i have a 3"tb, mbc at 22psi, aps cai, fuelpump, dynoflash(base) and i got it dynoed at 292 to the wheels, my a/f was in the 11's. im just trying to figure out how much i gained from turning up the boost.
Old Jul 5, 2005, 12:24 PM
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20whp
Old Jul 5, 2005, 12:26 PM
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Ditto.. around 10hp per 1psi is a general rule of thumb.
Old Jul 5, 2005, 01:08 PM
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thanks thats what i was looking for
Old Jul 5, 2005, 01:44 PM
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See: Law of Diminishing Return.

With increased boost pressure, all other things being equal, the increase in hp between 10-12 psi is oftern far greater then the increase between 22-24 psi.
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