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Thread: RRFPR

  1. #1
    mtrager's Avatar
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    RRFPR

    I installed one in my 07 Rxp. I set the base pressure at 58 and checked it through out the day. It was always at 58 and when I started it it dropped to 54 out of the water.

    When I got home and flushed the ski the gauge was showing 56. While ideling
    on the hose it dropped down in the upper 40's and the gauge backed up as I reved it up.

    After turning hose off and motor I checked it again and it showed 58.

    Is this normal?


  2. #2
    speedskixp's Avatar
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    Its normal for the pressure to drop a few lbs @ idle. It should not drop to the 40s though I would be curious to see where the pressure is at WOT.

  3. #3
    jpeconsult's Avatar
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    I was worried about the same fluctuations, but I don't think they dipped that low. Jim (Speedskixp) reassured that I was OK. --Jeremy

  4. #4
    mtrager's Avatar
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    The gauge does not face up. It faces to the side. I do not think you
    can safely see it running wide open.

    But I guess I need to try.

  5. #5
    Norwegian Wiking Trond's Avatar
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    Sounds normal...

    @ idle the engine produces vakuum... My guess is 10-12psi vakuum... Then the fuel pressure @ idle will drop 10-12psi. If you set the base pressure at 58, you will then se 46-48psi @ idle If your boost goes up to 10psi, you will se 68psi fuel pressure

  6. #6
    speedskixp's Avatar
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    Quote Originally Posted by Trond View Post
    Sounds normal...

    @ idle the engine produces vakuum... My guess is 10-12psi vakuum... Then the fuel pressure @ idle will drop 10-12psi. If you set the base pressure at 58, you will then se 46-48psi @ idle If your boost goes up to 10psi, you will se 68psi fuel pressure
    You should not have more then 4 or 5lbs of vacuum at idle.

  7. #7
    Norwegian Wiking Trond's Avatar
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    Are you sure?? That sounds very low to me...

  8. #8
    speedskixp's Avatar
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    Quote Originally Posted by mtrager View Post
    The gauge does not face up. It faces to the side. I do not think you
    can safely see it running wide open.

    But I guess I need to try.
    If its not safe dont do it. We need to get an A/F gauge on your boat to see what is going on. I diddnt realize that the gauge on the remote mount rude rrfpr diddnt face up. Whats the point of it being remote mount then? You can always relocate it to a more visible location.

  9. #9
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    Quote Originally Posted by mtrager View Post
    The gauge does not face up. It faces to the side. I do not think you
    can safely see it running wide open.

    But I guess I need to try.
    Mine faces towards the rear
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  10. #10
    speedskixp's Avatar
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    Quote Originally Posted by Trond View Post
    Are you sure?? That sounds very low to me...
    Yes. I have never seen any more than -5 .

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