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  1. #1

    SEA-DOO GTX Limited Supercharged (2004) - how to get more power?

    Hi, folks! Does anyone know, how to get more power from
    SEA-DOO GTX 4-TEC Limited Supercharged (2004)? What upgrades should I install and how many hp will I have then?


  2. #2
    King_Of_Fun's Avatar
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    Hey Elvis1956, welcome to the site! One thing you need to decide is how fast you want to go or how much money you want to spend. Either way, one will affect the other.

    You might first try this link on the Sea Doo FAQ forum:

    http://greenhulk.net/forums/showthread.php?t=16773

    There is plenty of information to digest and lots of very knowledgeable people around to help.

    ... Ron

  3. #3
    King_Of_Fun's Avatar
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    Oh, and I should have asked if you have replaced the ceramic washers in the supercharger. If you haven't, your engine is running on borrowed time and that should be the first mod that you do... Ron

  4. #4
    Banned User
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    More Booooooooooooooooost........ The more boost you make the more fun you'll have..

  5. #5
    u can turn it into a 215 motor if u want thats wat i did, u need to be carefull how much boost u add 2 the 04 gtx because of the cast pistions i added the 215 fordge pistions, if u want a lot of gain then sell the 04 and buy a rxt its cheeper and the resail will b better but if ur looking just 4 a little u can start with a green wheel 4 the s/c get a after market i/c a lot of people are useing the xs i/c a few people have made up kits u can buy at a fair price riva stage 1 repitch the prop check and c if ur 04 has the metal pump the latter ones had them if not i would get a used 1 and put in

  6. #6
    Dirty Sanchez's Avatar
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    i have an rxp ecu, knock harness an fuel pressure regulator off an rxp 275.00 shipped in the us 48
    change your sc washers if they are stock- they break & cause major engine damage
    -get an air intake- riva 3in- I might know of a used one forsale
    -bend you stock prop or get a solas after market prop
    - pump wedge is a must
    - fill your ride plate holes
    my gtx is going 67mph

    let me know if you want the ecu- it will change your power curve, higher rpms- Yellow jacket is right. you cant do much more since the pistons are cast

  7. #7
    Dirty Sanchez's Avatar
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    pm sent

    also intaKE GRATE OR OPAS CLIPS WILL HELP

  8. #8
    Moderator RX951's Avatar
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    Quote Originally Posted by Elvis1956 View Post
    Hi, folks! Does anyone know, how to get more power from
    SEA-DOO GTX 4-TEC Limited Supercharged (2004)? What upgrades should I install and how many hp will I have then?
    Welcome to the forum !

  9. #9
    JT jpt7779's Avatar
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    Quote Originally Posted by Elvis1956 View Post
    Hi, folks! Does anyone know, how to get more power from
    SEA-DOO GTX 4-TEC Limited Supercharged (2004)? What upgrades should I install and how many hp will I have then?
    Welcome. Trade it in on a 2008 RXT-X and get instant 255HP and gratification!!

    If you like to wrench, then start reading the many threads on this forum.

    Either way is a lot of fun!

  10. #10
    camar0's Avatar
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    The 04 185 motor will cost you to keep going faster.... if you plan on 70+ then id say sell the 04 and get an RXT instead, RXP if you mainly ride it yourself...... Getting the boat to move fast will continue to deplete your bank account, trust me, been there...

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