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  1. #1

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    Blow off Valve Question

    Is it normal for a Riva Supercharge blow-off valve to blow off at idel. I just installed it on a boat I'm building...I have an x charger on it. It is too much boost for the valve? Thanks for the help.


  2. #2
    King_Of_Fun's Avatar
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    At idle, the engine is going to be under vacuum not boost, so the BOV will open. It shouldn't open when under boost, otherwise you will loose boost... Ron

  3. #3
    AdrianRXT AdrianRXT's Avatar
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    Thumbs up

    yes is normal for the blow-off valve to blow off air at idel.

  4. #4

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    Thanks, guess I never noticed it on the other boats. Plus this is the first one of these kits I have used. Thanks

  5. #5
    rxpxseadog's Avatar
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    Quote Originally Posted by liquid151 View Post
    Thanks, guess I never noticed it on the other boats. Plus this is the first one of these kits I have used. Thanks

    The HKS blow-off I use does not stay open at idle, see: http://www.greenhulk.net/forums/showthread.php?t=78310T

    This is quite unique and prevents any loss in acceleration.

  6. #6
    Be a Hero...Punch a Koala Kaotic's Avatar
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    Quote Originally Posted by rxpxseadog View Post
    The HKS blow-off I use does not stay open at idle, see: http://www.greenhulk.net/forums/showthread.php?t=78310T

    This is quite unique and prevents any loss in acceleration.
    Most blow off valves have a spring on the plunger to keep it sealed.
    If not it would kind of defeat the purpose of an air filter

  7. #7
    fh23rxp-x's Avatar
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    will the riva pro series blow off valve work on a stage 1 ski ???

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