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  1. #1

    Question about Blow off valve

    Hey folks. I need some assistance, but think I figured it out. Setup is 07rxt, with X charger, 15/18 prop, external cooler, Riva 3" intake, X intercooler with Riva piping, riva intake grate, X waterbox, and freeflow exhaust.

    With 15/20 prop rpm 7400 max, 66.2mph max ran with stock exu
    With 14/17 prop rpm 72-7300 max 63.5mph max ran with stock ecu
    With 15/18 prop rpm 76-7700 max 64.3mph max ran with stock ecu
    With 15/18 prop rpm 8020 max 66.9mph ma ran with Riva ecu

    After a very disappointing day I noticed while flushing the engine (engine idling), there was a lot of air blowing through the BOV filter. I think and hope that this is the source of my rpm loss and boost loss. Is this normal, I don't think so.

    Thanks.

    Will be putting on a boost gage tomorrow. Will the reading from boost obtained from gauge be accurate with revving on a hose. Will not be able to ride til weekend.


  2. #2
    GOT BOOST? Dockside's Avatar
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    remove the BOV and try it...

  3. #3
    Eric Ocman's Avatar
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    Quote Originally Posted by Dockside View Post
    remove the BOV and try it...
    +1

  4. #4
    Will try removing the BOV. Is it adjustable with the allen key on top. Will That control opening pressures. It almost seems like the BOV is stuck open. Are you supposed to feel boost blowing through BOV at idle?

  5. #5
    GOT BOOST? Dockside's Avatar
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    IMO if you really want to use the BOV tune without it then youll know if theres a problem when you hook it up. IMO sounds like it isnt working.

  6. #6
    Quote Originally Posted by Dockside View Post
    IMO if you really want to use the BOV tune without it then youll know if theres a problem when you hook it up. IMO sounds like it isnt working.
    Will do. I forgot, does the Riva Piping come with the BOV blockoff? If not one can be machined.

  7. #7
    Get a flat piece of aluminum, draw out the flange and make one. Sounds like the bov is shot!

  8. #8
    Quote Originally Posted by stickshift69 View Post
    Get a flat piece of aluminum, draw out the flange and make one. Sounds like the bov is shot!
    Oh, I forgot to mention, the BOV has less than 3 hrs on it. In actuality, the last time I rode, which was the first time using the BOV, I was low approx 6-700 rpm.

  9. #9
    fh23rxp-x's Avatar
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    Quote Originally Posted by comish71 View Post
    Oh, I forgot to mention, the BOV has less than 3 hrs on it. In actuality, the last time I rode, which was the first time using the BOV, I was low approx 6-700 rpm.
    what BOV are u using ???????

  10. #10
    Quote Originally Posted by fh23rxp-x View Post
    what BOV are u using ???????
    Riva BOV recommended for Stage 3 setup.

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