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i wish my stockers made 440 at 18psi :) but yah, pressure is different than airflow.

horsepower is roughly 'x' lb/min of air * 10.86 * .85 (or .8 for an automatic)

this will give you rwhp for a turbocharged application. obviously there will be instances where this is low or instances where it is high, but its a pretty good estimating 'equation'

that equation may help you when deciding between two compressor maps
 

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monty187 said:
thanks for the equation so it goes like this... X*lb/min*10.86*.8
(im auto)

ScrewDrvr I am talking about stock twins.
yeah except the 'X' variable is a the airflow number OF pounds/min.
 

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yeah, greg b. pushes well over 400 to the wheels on 16 psi, i have no friggin idea how he does it (actually if you see this thread, feel free to post tips) where as on 18 psi i have at best 400 wheel.
 
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