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Thread: RRFPR

  1. #1
    Chrisx88's Avatar
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    RRFPR

    05 RXT

    Installed Riva RRFPR. Riva 8860/9k tunes call for 58PSI non rising rate. Set it to 58 and plug the vacuum line with supplied plug?


  2. #2
    SplishSplash's Avatar
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    I have that setup, tried that and it would not rev over 8000, went back to rising rate and got 8600 rpm. Im not sure why they kits comes wit a RRFPR and then the tell you to disable it. Ran all season last year with no issues using it as a rising rate (04 RXP 76 mph at 8600 rpm)

    What injectors are you running? Charger? Prop?

  3. #3
    Chrisx88's Avatar
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    Quote Originally Posted by SplishSplash View Post
    I have that setup, tried that and it would not rev over 8000, went back to rising rate and got 8600 rpm. Im not sure why they kits comes wit a RRFPR and then the tell you to disable it. Ran all season last year with no issues using it as a rising rate (04 RXP 76 mph at 8600 rpm)

    What injectors are you running? Charger? Prop?
    42lb, Xcharger, SRX-CD-15/20

  4. #4
    SplishSplash's Avatar
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    Yep, thats my setup, I think you want Rising rate connected, Mine just had no power without it connected
    Luckly its real simple to try both ways, Refernce tube connected or not, bet you get way more speed with it connected

  5. #5
    Xspook's Avatar
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    RRFPR?

    Was that invented by ?

  6. #6
    connorrxp's Avatar
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    Quote Originally Posted by SplishSplash View Post
    I have that setup, tried that and it would not rev over 8000, went back to rising rate and got 8600 rpm. Im not sure why they kits comes wit a RRFPR and then the tell you to disable it. Ran all season last year with no issues using it as a rising rate (04 RXP 76 mph at 8600 rpm)

    What injectors are you running? Charger? Prop?
    Are you checking your afr's? Riva tunes dont use rising rate

  7. #7
    I had a riva 8650 pro ecu at static 58 I was pig rich. Go rising rate it was okay. Go by the ecu suggest and checking your afr that's how you'll know. As for your question plug the vacuum line and set to 58psi

  8. #8
    ncdoo's Avatar
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    Check your AFRs. The purpose of a RRFPR is to
    increase fuel pressure, and subsequently add more fuel as the boost increases.
    If your AFRs are fine at boost with the vacuum line plugged, you're good. If you're running lean at full boost, you'll need to hook the vacuum line up.

  9. #9
    Chrisx88's Avatar
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    Ill get the tune loaded and wait untill spring then go from there.

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