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  1. #1

    results of x prop on 07 rxp with x charger and 42lb injectores need help 72mph

    hi guys well like i said i have a bone stock 07 rxp which is bone stock besides an x charger and 42lb injectors. i have no free mods , stock air intake. stock exhaust. i was on rev limit with stock 07 prop so i decided to try out a prop from an 08 rxpx boat. i am now at 8050 to 8100 rpm. i know this is the perfect rpms for it (btw i am at 72 mph gps speed) but i have future plans to mod more. i am doing an intake to begin with, waterbox mod with freeflow out the back. i expect to be at rev limit again with this if im correct. i also have future plans for an external intercooler and riva ride plate and intake grate with block offs. what prop should i be looking into that i can grow into it.


  2. #2
    West Texas RXP skoepp's Avatar
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    It is kinda a toss up.
    If and when you go with 4 inch air intake or rear air, your going to be on limiter again like you stated.
    Depending on air quality and where you ride a 15/20 could be close but my guess is it will be a bit steep without the external ic.
    When you go external intercooler your going to pick up some good rpms and a 15/20 would work.
    (I just added a xs ic to a x ecu, x charger and 42 s and gained 200+ rpm.)
    This was on a rxt with T-X prop at 8,100 rpm on limiter.

    One thing you could do, is when adding the air intake just add some pitch to the x prop.
    Then when go with external ic pick up a solas 15/20.

  3. #3
    A smart admits!A wicked excuses!An idiot insists! mitsakosgt's Avatar
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    I think you will need a 15/20 solas 4 blade!

  4. #4
    why did you put the x ecu on your ski? does it improve anything?

  5. #5
    i ride in miami florida

  6. #6
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by bksbigboy69 View Post
    why did you put the x ecu on your ski? does it improve anything?
    I bought a 05 rxt from a friend with that setup.
    It is a way to run x sc, external intercooler and 42s without a rising rate fuel regulator. The x 255 ecu is maped for it.
    Also wanted the vts x functions and only way to add x vts was to change the ecu.
    RXT models did not come with vts.
    I probably will put a bigger charger on it soon so will end up having to install a fuel regulator anyway.

  7. #7
    can i install an rxpx ecu on my 07 harness?

  8. #8
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by bksbigboy69 View Post
    can i install an rxpx ecu on my 07 harness?
    I dont think so. I think you need a x harness and cluster.
    Somone chime in if i am wrong.

  9. #9

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    With your planned upcoming upgrades here what you need to do for simplisity. Since you would need to change wiring harnesses and cluster (very expensive and labor intensive) just get a Rive ECU for a 07 boat. Install your planed upgrades and add 50 lb injectors and you will be good to go. Should be close to 80 mph. I have been this route on several RXPs and RXP-Xs and this is the easyist way to go and no need for any fuel regulators. I have run the above mods for several hundred hours and no issues whatsoever. The Riva rear air intake WITHOUT the filter. Filter costs you 80 to 100 RPM.

  10. #10
    Yes you can install a RXPX ECU on a 07 RXP, you just need to marry the cluster to the ECU with buds.

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