3.5-3.75” Pulley on P1X Procharger

Jordanfmeyer

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Can any of you members tell me from your knowledge what a pulley at 3.75 or 3.5” would put out on my car for boost? Procharger told me on the phone my 9psi is produced with the 4.0” pulley. I’m looking to hit 12psi so 3.75” sounds close but I wanted to see if any guys on here with 350’s could tell me exactly. Thank you!

 

ReapSow

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4" pulley on a d1x with a 7" crank makes between 11-12. Procharger offers two different IW crank pulley/balancer configurations for the gt350, which do you have?
 
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Jordanfmeyer

Jordanfmeyer

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4" pulley on a d1x with a 7" crank makes between 11-12. Procharger offers two different IW crank pulley/balancer configurations for the gt350, which do you have?
i just double checked. It’s 6.25” so right now based on the Procharger website, my blower is spinning at 52852 rpm. I’m just curious as to what pulley puts me at 12 psi. 3.25” would put me at the max rpm of 65000 rpm, which I would imagine would be up there in boost. Much past the limit my stock motor Could handle safely
 
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Jordanfmeyer

Jordanfmeyer

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From all of the reading I’ve done on here, 12 PSI on the stock voodoo is plenty.
 

Awdturbo4

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i just got my kit from procharger
they recommended 3.55 pulley 12psi
i have long tubes and cat deletes
fore double pump system
e-85
 
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Jordanfmeyer

Jordanfmeyer

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procharger said i should be 12ish psi..
i’m not sure on the lower pulley i can measure when i get home
Ah okay you went to the 3.55” pulley. Well I haven’t been able to upgrade to e85 yet. But I still was tossing around the idea of running a 3.5 inch pulley on 91 with Boostane. Let me know what psi that pulley comes out to. Thank you!
 

 
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