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  1. #1

    Join Date
    May 2011
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    will a 03 gtx engine run as good as a rxp

    Just wondering
    It is a 4 tec supercharged engine
    not sure if any one has used these in their gprxp or how well it would run dont know any thing about the seadoos
    looking to run 80 +

    any info will help
    thank you


  2. #2
    emilbolboaca's Avatar
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    Apr 2008
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    I think you should get a 215hp engine and you will be close to 80mph stock

  3. #3
    Every adventure comes to an end........ Not Today! wreckingball's Avatar
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    Quote Originally Posted by crittpen View Post
    Just wondering
    It is a 4 tec supercharged engine
    not sure if any one has used these in their gprxp or how well it would run dont know any thing about the seadoos
    looking to run 80 +

    any info will help
    thank you
    The '03 was the first year that the 4-Tec was supercharged and it was only rated at 185 hp. I'm pretty sure that mechanically the only differences between the 185 and the 215 hp motors was the casting of the pistons. The 215 motors have more reliable and lighter pistons. The rest is in the electronic tuning.... Or so I believe. I just rebuilt the motor for my '03 and it has cases from a 2006, a head off of a 2005, and pistons from an '04. Everything else was still good from my old motor (except new bearings and seals).

  4. #4
    Autosport's Avatar
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    Dint the gtx run a different gear that drives the supercharger slower (IE less boost)

  5. #5
    Every adventure comes to an end........ Not Today! wreckingball's Avatar
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    Quote Originally Posted by Autosport View Post
    Dint the gtx run a different gear that drives the supercharger slower (IE less boost)
    ??????

  6. #6
    GGG's Avatar
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    ya I know the supercharger gear has an extra tooth on the 185 hp to create less boost. I also believe the flywheel is different. Also the 185 hp doesnt have an intercooler like the 215. Its quite a bit of $$ to turn a 185 motor into a 215

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