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  1. #1
    Matatan tocullo's Avatar
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    Impeller setback mod??

    Is there a real benefit on this mod? I'm spinning 8900 rpms ona 15/20 prop at 84mph. What can I spect if I do this mod? Thanks


  2. #2
    RXP TJEEZE's Avatar
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    A hole lot more hookup an scaryness,acceleration an arm pump. Its a great add on an i love it.

  3. #3
    pwc4life's Avatar
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    I have heard the setback mod on a prop drops RPM. Can anyone confirm this also?

    Any top speed gains to be had?

  4. #4
    Matatan tocullo's Avatar
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    Great, would it help cavitation?

  5. #5
    RXP TJEEZE's Avatar
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    ERICK at (SF) says a set back mod by its self will give u 100 RMP .

  6. #6
    pwc4life's Avatar
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    Will a setback prop bolt right in or does any part of the pump need to be modified to accept it?

  7. #7
    JT jpt7779's Avatar
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    Quote Originally Posted by tocullo View Post
    Is there a real benefit on this mod? I'm spinning 8900 rpms ona 15/20 prop at 84mph. What can I spect if I do this mod? Thanks
    Quote Originally Posted by tocullo View Post
    Great, would it help cavitation?
    If you are using a 2009 or newer SRZ Solas it is already setback. A SRX would benefit from a setback mod.

    To fix your cavitation issue with your 15/20, send it Erik at SFR anyway, it needs to be changed to a 12.5/20. I just had a lengthy conversation with him about cavitation and my "SRZ 15/21" that was not even close to that. I was getting moderate hole shot cavitation with this new impeller. I put my trusty old 2008 SRX 12.5/19 SFR setback back on the other day and hole shot cavitation is completely gone and got great performance all around.

    IMO, the re-pitch by Erik will fix your cavitation - not the setback.........

  8. #8
    i hate my bipolar disorder its great
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    what is this setback mod, machining the bolting boss inside the prop to set the prop further back? couldnt anyone do this?

  9. #9
    JT jpt7779's Avatar
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    Quote Originally Posted by cracker View Post
    what is this setback mod, machining the bolting boss inside the prop to set the prop further back? couldnt anyone do this?
    Correct


  10. #10
    i hate my bipolar disorder its great
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    Quote Originally Posted by jpt7779 View Post
    Correct

    how much... or is it just machined to just before it hits the pump stator

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