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  1. #1

    NEW C kit with RXT-X

    Jerry:
    What extra part do I need , if I wanted to fit this C-kit to my up coming RXT X????
    Any suggestions guys?
    THX


  2. #2
    Site Admin Green Hulk's Avatar
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    Hi Simon, the only other thing you would need would be the rising rate fuel pressure regulator.

    http://www.4-tecperformance.com/inde...roducts_id=669

    The stock 42# injectors on the X ski should provide sufficient fuel with the rising rate regulator, but i advise you measure your air fuel ratio just to be sure.

  3. #3
    GOTTA PAY TO PLAY!!! rocko672's Avatar
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    your also gonna need to get the RE blockoffs cause the rxt starts to porpus around 74+ mph....... just my $.02

  4. #4
    ARNYGOLLOTT3's Avatar
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    You probably want to upgrade the stock air intake also so as to maximize the amount of air the C Kit can take in....and when an exhaust upgrade becomes available you will likely benefit from allowing it to breath easier on that side too...!

    Definitely look into a/f monitoring....cheap insurance ($400 bucks or so) against a damaged engine from running lean...!

    That X ski is going to pull like a MONSTER with a C Kit S/C....better start working those arms out!!!

  5. #5
    jwade's Avatar
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    Quote Originally Posted by Green Hulk View Post
    Hi Simon, the only other thing you would need would be the rising rate fuel pressure regulator.

    http://www.4-tecperformance.com/inde...roducts_id=669

    The stock 42# injectors on the X ski should provide sufficient fuel with the rising rate regulator, but i advise you measure your air fuel ratio just to be sure.
    Jerry, just curious, how does the stock 'X' supercharger stack up? I thought I read somewhere that it runs 8.5 to 10 psi stock boost vs. the 15 or better psi with the C kit SC? How does this translate into speed?

    Any other thoughts on how to make this 'X' boat faster without having to unload 3500 + bucks. New prop??? grate??? SC Wheel in stock housing???

    I'm not looking to go 85-90 as I cannot see spending that much coin, but would like the option of runing high 70's if possible and spending a couple grand on her. Thx, Jon

  6. #6
    Site Admin Green Hulk's Avatar
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    5 more PSI could mean 500 more RPM's. 100 RPM's could translate into 1 more MPH so you have the potential to increase 5 more MPH. Of course, you will need the right impeller to do it.

    There will be some really cool things coming from Riva for the X models.

  7. #7
    home of the dislexic fingers breon's Avatar
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    jerry any of the things for the rxp x going to work on the rxp ..new product insite

  8. #8
    Site Admin Green Hulk's Avatar
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    Not really, all of the current Riva products will work on the 08's. The X models are just a bit different with their intercooler placement and such so Riva is working around that for those models.

  9. #9
    Jarrett's Avatar
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    Jerry, do the X's need the Riva valve train upgrade when going to higher RPMs? Or did they do something similar at the factory on these?

  10. #10
    Site Admin Green Hulk's Avatar
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    If you go with an aftermarket ECU you will need to do the valvetrain upgrade.

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