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  1. #1

    How to update a 185 sc to a 215 sc

    Has anybody done this before, if so please tell me where i can get it...


    Thanks, Dylan


  2. #2
    Dylan, Depending on what year GTX you have, to do it correctly, for starters you`ll need:
    Rotax 58 psi fuel pressure reg
    RXP/RXT ecu
    Knock sensor update/piggy back harness
    215 SC drive gears set (Rotax)
    stock intake manifold with stock IC- or- aftermarket IC.

    you would also want to:
    upgrade the exhaust system
    either go to a 12\20 solas 155 prop-or- change out the wear ring to the RXP/RXT 159mm size and have a few more choices in props(impellers)

    while you at it, change out the stock SC impeller to a Riva or green wheel, metal washers with the new improved ceramic bearings...

    By the time you add all of this expense up and the necessary time involved it would make a whole lot more sense to trade in the GTX for a RXP or RXT...

  3. #3
    Its an 05... I was going to put on a stage 1 kit, 58 psi fuel regulator, free flow exhaust kit, valvetrain upgrade kit, and riva thermostat kit... How much is a ecu and a stock intercooler?

  4. #4
    Quote Originally Posted by The Blue Demon View Post
    Its an 05... I was going to put on a stage 1 kit, 58 psi fuel regulator, free flow exhaust kit, valvetrain upgrade kit, and riva thermostat kit... How much is a ecu and a stock intercooler?
    if your going to do the valve train upgrade, IMHO don`t even waste any of your time with the smaller prop (155) rebuild the stock pump with larger wear ring and prop to benefit from the higher RPM`s and more juice! assuming that you have a GTX SC and not the limited 215...

  5. #5
    King_Of_Fun's Avatar
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    Don't forget that you will need forged pistons. The 185-hp engines have cast pistons and are definately a weak item when doing mods... Ron

  6. #6
    Ya its a 185... So where is a intercooler i can get without having to remove the o.p.a.s?

  7. #7
    King_Of_Fun's Avatar
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    Quote Originally Posted by The Blue Demon View Post
    Ya its a 185... So where is a intercooler i can get without having to remove the o.p.a.s?
    RXPs, RXTs, RXP-Xs and RXT-Xs all have OPAS and intercoolers. Why would you have to remove the OPAS to install an IC?... Ron

  8. #8
    Well i was lookin at after market intercoolers and they say you need to remove the opas for it... idk... Where is a stock ic for a 2005 gtx sc

  9. #9
    gtxscrider's Avatar
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    I think the cam is also diffrent in 185hp engines you might need to upgrade to a 215hp cam.

  10. #10
    Kaybat's Avatar
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    you'll spend ALOT of $$(and time)converting it to a 215. I wanted to do the same to my last ski(03 GTXSC)...finally said screw it and left well enough alone.
    I'd just put a stage 2 kit on it and enjoy

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