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3.5-3.75” Pulley on P1X Procharger

Discussion in '5.2L V8 Voodoo Engine Mods & Bolt-Ons' started by Jordanfmeyer, Jun 19, 2020.

  1. Jordanfmeyer

    Jordanfmeyer Well-Known Member

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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!
     
  2. ReapSow

    ReapSow Well-Known Member

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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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  3. OP
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    Jordanfmeyer

    Jordanfmeyer Well-Known Member

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    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 Well-Known Member

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    From all of the reading I’ve done on here, 12 PSI on the stock voodoo is plenty.
     
  5. Awdturbo4

    Awdturbo4 Member

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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
     
  6. OP
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    Jordanfmeyer

    Jordanfmeyer Well-Known Member

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    What kit did you go with?
     
  7. Awdturbo4

    Awdturbo4 Member

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    p1x
    i am on on gen 2 5.2 which stronger block
    head studs and headgaskets
     
  8. OP
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    Jordanfmeyer

    Jordanfmeyer Well-Known Member

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    9 psi?
     
  9. Awdturbo4

    Awdturbo4 Member

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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
     
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    Jordanfmeyer

    Jordanfmeyer Well-Known Member

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    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!
     
  11. Awdturbo4

    Awdturbo4 Member

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    yes i’m on 6.25 lower
     
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    Jordanfmeyer

    Jordanfmeyer Well-Known Member

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    Same here. Should be 52,800 rpm blower speed roughly. Well for me that is. I’m on the 4” pulley.
     
  13. Awdturbo4

    Awdturbo4 Member

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    yes if i spin to 8250 mine is 59000 roughly
     
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    Jordanfmeyer

    Jordanfmeyer Well-Known Member

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    That’s getting up there. Max is 62,xxx rpm I believe. That rpm is only putting out 12psi?
     
  15. Awdturbo4

    Awdturbo4 Member

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    not sure yet i bet is closer to 13ish i’ll let you know once i get the kit installed
     
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