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Thread: vr-4

  1. #1
    Senior SCH Member
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    vr-4

    My brother and I installed my vr-4 that craig installed the upgrade and rebuilt for me filled the oil cooler and blower and took it for a ride. wow 9lbs of boost @ 5500 r.p.m with a 4.5 " 6 rib blower pulley 7" crank pulley. No belt slip either!

  2. #2
    SCH Member
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    Nov 2009
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    Lawrence, KS
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    what's your engine again? Cubic inches, compression ratio?

  3. #3
    Senior SCH Member
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    Ford 302 9:1 not stock by any means either.

  4. #4
    SCH Member
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    Well crap-i was hoping this was on your 454 (thought thats what you were running). I've had this VR4 for a few years and it's probably not worth rebuilding/using since i've been told it just wont push the air needed to do much good on a built 415 inch small block dodge. I only want 8-10 psi or so, but i guess the CFM just isn't there. Might need to look elsewhere. Glad to see it's pushing you in the seat hard.-rick

  5. #5
    Senior SCH Member
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    What size pulleys do you have on it if you go with smaller supercharger pulley you will get 8-10 lbs the vr4 pushes as much cfm as a novi 2000. What year did you buy the vr-4? Did you buy it when the granetellis still owned paxton?

  6. #6
    SCH Member
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    Never installed it- needs a rebuild. Unknown age- i got it about 5 years ago from someone that had it on his shelf for maybe 5 years. He purchased it from Paxton as a rebuild that a Renegade racer sent in (i think when Paxton stopped paying contigency money for racers that wouldn't switch to the newly released Novi). I just posted a big long speal about how i'm not sure if this is worth my time/money to rebuild and install-rick

  7. #7
    Senior SCH Member
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    Send a picture to my email I've heard the vr4 impeller was different when the granatellis owned it.

  8. #8
    Senior SCH Member
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    Ill buy it if you want to sell it?

  9. #9
    SCH Member
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    Nov 2009
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  10. #10
    SCH Member
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    Quote Originally Posted by Duke View Post
    Ill buy it if you want to sell it?
    You have a message...

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