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  1. #1

    215hp to 255hp what is needed

    I am currently in the middle of a new conversion project. 4-tec motor in ultra 250x hull.
    Have a mint 2007 hull and a 2005 rxp with engine damage.
    Currently rebuilding the motor.
    Once fitted I would like to up the hp to 255 if possible. This is going to be my normal everyday ski so looking for something reliable and stable in the severe chop we have this side of the Atlantic.
    What is required to up the hp for as cheap as possible.
    Larger sc.Injectors. Does the ecu need replacing also

    Alm help is appreciated


  2. #2
    RXP 260 X Short Course Veteran RXP244's Avatar
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    Basically a 255 is a 215 with a bigger SC wheel, injectors and remapped ECU with an external IC.

    So you will need X Charger or similar, 42# injectors with a RRFPR if you plan not to change or remap your ECU and an external IC upgrade.

    Or Bigger SC with 48# injectors and a 255 ECU and an external IC upgrade.



    Quote Originally Posted by steelroe View Post
    I am currently in the middle of a new conversion project. 4-tec motor in ultra 250x hull.
    Have a mint 2007 hull and a 2005 rxp with engine damage.
    Currently rebuilding the motor.
    Once fitted I would like to up the hp to 255 if possible. This is going to be my normal everyday ski so looking for something reliable and stable in the severe chop we have this side of the Atlantic.
    What is required to up the hp for as cheap as possible.
    Larger sc.Injectors. Does the ecu need replacing also

    Alm help is appreciated

  3. #3
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    Aug 2007
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    Tampa Bay, FL
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    9,202
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    X charger, external intercooler.... and the fueling to support it.

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