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Thread: fzs juddering

  1. #1
    it's goin like boeing jdml's Avatar
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    fzs juddering

    just changed my supercharger impeller from 11.5 psi to16 psi all fine on acceleration but as soon as you let go of the throttle the ski judders very badley its like the blow off valve cant get rid of the negative pressure any ideas please.


  2. #2

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    which blow off valve you got.

  3. #3
    Kelly_A's Avatar
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    double check your vac line to the BOV also. Are you hearing the BOV hiss on decel?

  4. #4
    it's goin like boeing jdml's Avatar
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    just replaced vac line i can hear blow off valve hissin and its an hks valve thanks guys

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    305coco's Avatar
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    sounds normal to me, when you go to a high boost wheel such as the E1, C5, ET 15.5 wheel you get this fluttering/vibration from the SC when you release the throttle.

  6. #6
    Antiguan FZR's Avatar
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    Is this only related to the HKS BOV? Mines an HKS and it vibrates, A friends ski has a Gredy BOV with a C8 and no vibration.

  7. #7
    it's goin like boeing jdml's Avatar
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    o
    Last edited by jdml; 05-28-2011 at 04:54 PM.

  8. #8
    Antiguan FZR's Avatar
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    jdml

    What I/C r you running? I have the Riva Powercooler.

    Do you think we can adapt the HKS to the Greddy BOV on the RIva Powercooler? or would we need to block off the hole then weld the flange for the Greddy?

  9. #9
    STALKER FZR's Avatar
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    Is the HKS adjustable?...If so, possibly an adjustment issue maybe?

  10. #10
    mjh3ides's Avatar
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    Not sure I'd use a Greddy in salt water. See post 45:
    http://www.greenhulk.net/forums/show...dy#post1452870

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