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  1. #1
    slydogge's Avatar
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    185hp - 255hp rotax is it possible?

    hey guys I have one of the 370 seadoo speedster 200 boats and I am wanting to put the external coolers x chargers and 42 lb injectors in the boat. I know I have to change the starter gear but will the 42 lb injectors work with the 185 computer? Thanks for the help!


  2. #2
    Boost addict hotbird's Avatar
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    Probably all stuff you already know but,

    I was told the 185 has 38lb injectors the only difference is the fuel pressure to the injectors. But I am only doing 185 to 215.
    I'm not sure on the boats but the 185 skis have cast pistons vs forged on 215 and up.

    I have been told running 215 on the cast pistons is not the greatest idea, so running 255 would probably be a recipe for broken/melted pistons.

    EDIT I have been told by 2 other members that running a x charger and 42lb injectors can be done on cast pistons with external intercooler.
    Thats about 255 HP!
    Last edited by hotbird; 04-22-2012 at 04:33 PM.

  3. #3
    boost junkie skidoochris's Avatar
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    185 ecu also has lower rpm limiter. IMO buy a afr gage so you will know if your fat or lean then you can tune it with a rrfpr

  4. #4
    JFizzleJR's Avatar
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    Quote Originally Posted by hotbird View Post
    Probably all stuff you aready know but,

    I was told the 185 has 42lb injectors the only difference is the fuel pressure to the injectors. But I am only doing 185 to 215.
    I'm not sure on the boats but the 185 skis have cast pistons vs forged on 215 and up.

    I have been told running 215 on the cast pistons is not the greatest idea, so running 255 would probably be a recipe for broken/melted pistons.
    Neither the 185 nor the 215 come with 42 lb injectors in stock form. You'll want to change to a 2004-2005 215 ecu, 58 psi fuel pressure regulator or rising rate regulator, external intercooler, x charger, 42s, rear air or 4" front intake, forged pistons, then you have the pump setup to deal with...there are several very informative threads out there about getting the 185 up to speed. Good luck

  5. #5
    mikelytle1077's Avatar
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    Quote Originally Posted by hotbird View Post
    Probably all stuff you aready know but,

    I was told the 185 has 42lb injectors the only difference is the fuel pressure to the injectors. But I am only doing 185 to 215.
    I'm not sure on the boats but the 185 skis have cast pistons vs forged on 215 and up.

    I have been told running 215 on the cast pistons is not the greatest idea, so running 255 would probably be a recipe for broken/melted pistons.
    42lb came in the x skis only the others are 38lb injectors

  6. #6

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    I did x charger w/ 17 tooth gear, 42 lb. injectors, external intercooler, 160 thermostat, cold air intake, RXP ecu, rxp FPR and a 12/20 concord to my 04 GTX 185 and it runs very well with no issues so far 60+ hours on the cast pistons and no RRFPR.

  7. #7
    mikelytle1077's Avatar
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    i would think your running pretty lean up top but if its working thats great, any idea what your afrs look like ?

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