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Looking into getting a P1 Procharger next year, and just wanted to know what was the stock pulley size that comes with the kit, and how much PSI does it make.

What are the other sizes of pullies for the P1 you can get from ATI and what PSI do they make?

What does a different size pulley cost?

Thanks for the help.
 

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It is hard to put a PSI per pulley size number on it. Too many variables. However, my P1 came with a 4" pulley and it would just see around 6-6.5 max psi. I tried a 3.7 and got 7.5 or so, now I am down to a 3.4 and have 10 psi at the 6600rpm rev limiter procharger gave it and 12 at the 6800 rpm limiter I set it to. This is on an 05 with headers as the only other "breathing" mod.
Joe
 
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