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  1. #1
    P-ROD's Avatar
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    RXP-X Riva Stage I - Only 7750 RPM ?

    I just finished installing my riva stage I kit. Before I was hitin 8100 RPM's with the just the air intake installed. But now I'm only getting around 7750 RPM's @ 71 MPH, shouldn't it be around 8000 RPM's? Does anyone have any ideas of what could be causing the 250 RPM loss?


  2. #2
    Mod less, ride more! troyheb's Avatar
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    You probably have a boost leak somewhere. The SC hoses have to be perfect.
    Is a Riva kit the only thing you added or is there anything else?

  3. #3
    P-ROD's Avatar
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    I really dont think i have a SC leak, I ran it with just a air intake @ 8100 for a few hours, But I could be wrong is there anyway to test for sc leaks. If its not a SC leak any other thoughts?.I just have a the Riva Kit at this point.

  4. #4
    Mod less, ride more! troyheb's Avatar
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    That kit come with a adjustable nozzle? If so What ring are you running?

  5. #5
    P-ROD's Avatar
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    Yep, I'm running the 82mm, The kit came with 81,82,83 I could try the 83 but wouldn't I lose some top speed?

  6. #6
    h2jim's Avatar
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    When you were running 8100 with just the air intake installed, what prop were you using?

  7. #7
    h2jim's Avatar
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    You will gain top speed as you get your rpms back up. I would put your stock one back on.

  8. #8
    h2jim's Avatar
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    Going from an 82 to an 83 ring will only get you approx. 100 rpm. That's why I suggested your stock.

  9. #9
    P-ROD's Avatar
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    Quote Originally Posted by h2jim View Post
    When you were running 8100 with just the air intake installed, what prop were you using?
    I was running the stock prop

  10. #10
    h2jim's Avatar
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    Sounds like your stock prop is pretty strong.

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