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  1. #1
    RXP rider's Avatar
    Join Date
    May 2010
    Northern Europe

    Need help to fuel pressure


    I am making some mods to my stock RXP, my mods right now are as follows:

    Worx intake
    Solas 14/19 impeller bran new
    SS wear ring bran new
    XL intercooler
    4¨ front mounted air filter kit
    Blow of valve Kit
    Rotax Racing ECU
    through hull exhoust
    And ofcouse a rebuilded SC but with stock impeller

    I guess I will need to go with some bigger fuel injectores, but I have in mind maybe to do some more mods later. Would you advice me to go with 42 injectores or a fuel pressure regulator ? I would prefer a fprr but I am not sure how to adjust it as the engine is running correct. Ofcouse I would like to advoid a too lean mixture.

    Anyone who could tell me how to adjust it right ?

  2. #2
    mrbtd's Avatar
    Join Date
    Jul 2005
    Lindenhurst, Illinois, United States
    you better handle the valvetrain BEFORE you worry about the fuel...

    What is the RPM you are shooting for with the ECU ?

  3. #3
    RXP rider's Avatar
    Join Date
    May 2010
    Northern Europe
    No more than 8200-8300 in the beginning. Later I will upgrade the valves and retainers but not now. Can I controll the max RPM by the fuel pressure since you ask that way ?

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