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  1. #1

    Question Riva pro series waterbox results

    So I started out with a stock waterbox, modified from the way greenhulk tells us to. That puts me at stage 3 rxp (05 RXP minus the ECU and riva pro venturi) running at 8150 right at half a tank 2 weeks ago.

    I decide to buy a Riva pro waterbox and then this weekend i actually lost 400 rpm. It would not rev past 7850. How is this right. I thought that box was an improvement over stock or modified box?

    Anyone else had this happen?


  2. #2
    formerly Gold06RXP Turbo Nick's Avatar
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    That baffle inside he botx might have broken loose restricting your exhaust. If thats ok put your other one back on and see what happens

  3. #3
    Water4fire's Avatar
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    Quote Originally Posted by GOLD06RXP View Post
    That baffle inside he botx might have broken loose restricting your exhaust. If thats ok put your other one back on and see what happens
    Bro Isnt the riva gutted ?

  4. #4
    Quote Originally Posted by Water4fire View Post
    Bro Isnt the riva gutted ?
    YES the riva has no baffle in it.

  5. #5
    83.0 @ 8400 jhill19's Avatar
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    List your mods bro. Sounds similar to my setup.

  6. #6
    MSRXP's Avatar
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    Boost leak or fuel pump. If you ate stage 3 on an oem pump there could lie your problem. I searched for 4 months until I figured it our. Loss is due to changes in the map and other sensor readings not seeing enough fuel to advance the curve which intern you get a loss of rpms. I was down almost 400.

  7. #7
    Quote Originally Posted by RXP_Noah View Post
    Stage 3 rxp (05 RXP minus the ECU and riva pro venturi)
    Read above

  8. #8
    SPEED COMES 1/10 @ A TIME SpeedFreeks Racing's Avatar
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    i would check for an exhaust leak being that you just installed the water box. you may be getting exhaust into your air intake/motor causing an rpm drop. one good way to check is to take your ski for a ride with out the seat, if you pick up rpm you have an exhaust leak for sure.

  9. #9
    shrabber's Avatar
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    Hey new yorka are you caught up yet I have 5 cylinders Heads i need done by Friday I will ship them out ground you will have them thursday evening

  10. #10
    b_dolla44's Avatar
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    Quote Originally Posted by SpeedFreeks Racing View Post
    i would check for an exhaust leak being that you just installed the water box. you may be getting exhaust into your air intake/motor causing an rpm drop. one good way to check is to take your ski for a ride with out the seat, if you pick up rpm you have an exhaust leak for sure.
    I'm betting this is you issue^^^^^^

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