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  1. #1
    mikevv's Avatar
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    What is the ECU RPM and Boost limit on a 2009 RXP-X

    I am pretty sure there is an RPM linit set by the stock ECU at around 8100RPMs. Can someone verify? And does the stock ECU limit boost?


  2. #2
    ADAMBOMB's Avatar
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    Stock Ecu you will want to be right at 8100.

  3. #3
    Mod less, ride more! troyheb's Avatar
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    Hard limiter @ 8200.
    There is no boost limiter.

  4. #4
    boost junkie skidoochris's Avatar
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    the only boost limit is the stock ecu fuel map

  5. #5
    Mod less, ride more! troyheb's Avatar
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    Quote Originally Posted by skidoochris View Post
    the only boost limit is the stock ecu fuel map
    How?

  6. #6
    monaroman76's Avatar
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    Quote Originally Posted by troyheb View Post
    How?
    I think he means that the max fuel from the map restricts how much boost you can run (safely).
    Obviously you can run whatever boost you like.

  7. #7
    RipNSki's Avatar
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    My 09 will hit 8200 with the set up it has... I beleive 8200 is the limiter... I am wondering about injectors now and a RR...

  8. #8
    RipNSki's Avatar
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    I think 8350 (according to Jerry) is ok with a stock set up... I plan to get a tune to that once I add a few more things I think...
    Ripper

    I am learing as much as I can also... (thanks to Troyheb, Tron, Meepers ect...)

  9. #9
    RipNSki's Avatar
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    I do 73 ish in the heat...100 degrees in 80 degree water...
    I think I'll be around 75 once I fill the holes, cut the reverse bucket and remove the opas... Then I'll try the cooler weather and put my 15/22R and see if I can get 8100 with it.. If not I think I may try a 83 or ajustable nozzle set up... I ride smooth water and really just want top end...

    Ripper

  10. #10
    szt8b7's Avatar
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    Quote Originally Posted by RipNSki View Post
    My 09 will hit 8200 with the set up it has... I beleive 8200 is the limiter... I am wondering about injectors now and a RR...
    8200 is the limiter but you don't want to be banging away at it I've read. Beside hurting your top end speed it is not healthy for the engine. Definitely get an 83mm nozzle. It is better for top end, will pull your RPM down some (off the limiter) and I had less cavitation out of hard turns with it. Keep at it!

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