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which pulley?

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Old Dec 7, 2010 | 06:56 PM
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Default which pulley?

ok,

i am new to the centrifugal style S/C and what pulley sizes do what.
i have looked on the internet to find something that tells me XX size pulley= xx psi boost. i need this information to order my new pulley size for more boost. i dont know what size is on it now but im pretty sure its a 3.85. please help me out.

the model is a procharger D1sc
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Old Dec 7, 2010 | 07:01 PM
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there is no info on XX pulley ='s XX boost.

Headers, intake, heads, cam will all have an effect on the amount of boost you produce.

Check what size you hvae on now, the general rule of thumb is ever .2 you go down is 1-2#'s more boost.
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Old Dec 7, 2010 | 10:18 PM
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thanks, im still learning.
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Old Dec 8, 2010 | 11:18 AM
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Also need to factor in what size crank pulley you will be running. Larger the pulley there, the faster you will spin your blower w/o having to change the blower pulley. Plus it will give you better belt wrap which can eliminate belt slip (or should help) if you're experiencing any. I will be running an Innovative West 8" crank pulley on my new engine.
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Old Dec 13, 2010 | 11:48 AM
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Default Boost

Don't forget to account for elevation, .5psi drop for every 1000' of elevation.
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