Forced Induction Superchargers | Turbochargers | Intercoolers

is this calculation accurate?

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Old Jul 31, 2005 | 09:58 PM
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Default is this calculation accurate?

600rwhp(goal)/300 NA rwhp = 2 - 1 = 1x14.7= 14.7psi to acheive 600rwhp? from what ive seen people are getting 600rwhp with 12-13spi on a stock ls1. i always heard and read that when you have 15psi you double the engines NA power.

heres another 500rwhp/300 = 1.6 - 1 = .6 x 14.7 = 9.7psi
i see people with incons making damn close to 500 with 8psi and found a couple people making 530's with 9-10psi.

whats your thoughts on this?
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Old Jul 31, 2005 | 10:03 PM
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i think 14:7 is correct but there are variables.heat, if it's a turbo or supercharger because at 15 lbs a supercharger will soak up quite a bit of hp.
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Old Jul 31, 2005 | 10:29 PM
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Originally Posted by slow trap
i think 14:7 is correct but there are variables.heat, if it's a turbo or supercharger because at 15 lbs a supercharger will soak up quite a bit of hp.

Im making 572rw with 8.5 lbs
on the stock shortblock with Incon twins
I did 327rw 337rt stock w/ the borla catback I'm still running.
Cartek stage 2 heads and a boost cam are helping my numbers.
15# with the twins should double your NA no's.
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Old Jul 31, 2005 | 10:57 PM
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The thing about calculations like that is they do not take into account temperature rise and torque gain. At the very least temperature rise needs to be factored in, which is a negative. But torque gain is a positive.

Let me know, I have quite a few spreadsheets built that will estimate temperature rise, with and without intercooling.

Mike
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