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  1. #1
    RXP rider's Avatar
    Join Date
    May 2010
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    Northern Europe
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    125

    Need help to fuel pressure

    Hi.

    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
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    Jul 2005
    Location
    Lindenhurst, Illinois, United States
    Posts
    4,309
    +1
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    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
    Location
    Northern Europe
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    125
    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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