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  1. #1

    04 RXP Supercharger to X Charger

    I currently have a stage 1 04 Rxp with about 185 hours on it. I am still running the original supercharger and put in a 14/19 solas. The ski runs mint and I ride it hard all the time here on Long Island. I am currently running about 8050 rpm and seeing about 70. I rode the new X and was'nt really that impressed with it. I mean to trade my ski in with those hours and put up like 8 grand or more is not worth it to me. I also tried a 15/20 solas and it put my rpm's down to 7700 and kept the same top speed.
    I read a few things about the new X supercharger and was wondering if I can try replacing my charger with the X one and throwing that 15/20 back in. I think that the extra boost will spin that 15/20 to about 8000 rpm's and here comes some more speed!!

    Will it work or do I have to do something else??


  2. #2
    Jeepster's Avatar
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    Ever thought about fuel lean conditions...?
    I don't think the stock injectors would be enough to provide sufficient fuel needed with that amount of boost.

  3. #3
    42 lb injectors or a rrfr a friend of mine put a x charger on and saw about 3-400 r's over stock s/c i'm still trying to figure ou whats going on with mine

  4. #4
    agibbs's Avatar
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    Quote Originally Posted by monsoonmadness View Post
    I read a few things about the new X supercharger and was wondering if I can try replacing my charger with the X one and throwing that 15/20 back in. I think that the extra boost will spin that 15/20 to about 8000 rpm's and here comes some more speed!!

    Will it work or do I have to do something else??

    If you are going to replace the stock s/c with the "X" s/c, you will need at least 42s, but you'd be better off with a RRFPR. I don't know if you're going to put an external intercooler on, but I went from Stage 1 to the mods I have now. When I first took my RXT out with the 15/20 I was on the limiter, it's perfect with a 81mm nozzle ring though.

  5. #5
    What is a RRFPR??

  6. #6
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by monsoonmadness View Post
    What is a RRFPR??
    Here is what it is?
    Rude Performance Rising Rate Fuel Pressure Regulator
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #7
    And what does this thing do for me and where does it go??

  8. #8
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by monsoonmadness View Post
    And what does this thing do for me and where does it go??
    Goes on top of your fuel tank in place of your stock regulator. It will increase fuel as your boost increases.
    You can run your stock injectors with stock ecu.

  9. #9
    Gus13letter's Avatar
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    I too am looking to add the X charger on my RXT along with the Pirahna or maybe XS intercooler and RRFPR to crest the 70MPH mark.

    I know there are threads about the X charger because someone told me about them, but I havent been able to find them. Anyone have a couple useful links handy?
    Last edited by Gus13letter; 06-02-2008 at 09:11 PM.

  10. #10
    West Texas RXP skoepp's Avatar
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    Here is the original thread, some good info on rrfpr.

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