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  1. #11
    Happily Self-Employed WFO's Avatar
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    Not really a speed trick, but will keep your 1300 together longer. Especially on the EFIs, since we cant richen up just #3.

    I always use a head gasket from an 05-06 GPR. It has larger cooling holes, especially on #3 cylinder (where it is needed). I also take the exhaust manifold gasket and open up the (2) cooling holes on the bottom of #3 cylinder to match #2. Look at it and you will see. Lay the gasket on the manifold and use a sharpe/marker and make a mark on any material blocking water flow. Take your dremel tool and smooth the marked material in all the manifold water passages.

    And dump the water from the head on at least #3 overboard on aftermarket heads, and the rearward of the (2) water ports on stock heads.


  2. #12
    Moderator RX951's Avatar
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  3. #13
    Hydrotoys's Avatar
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    Lose 70lbs, for approx 1mph speed increase. You or the boat!

  4. #14
    spud's Avatar
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    Clean up all the surfaces that need to release the water (trailing edge of ride plate). Make them nice and sharp 90° angle to the water. This goes for pump nozzle, turning nozzle, trim tabs and plate. I even did the pump shoe where it rides below the plate. Hope I didn't Fock anything up.


  5. #15
    Moderator OsideBill's Avatar
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    Billie you have to enlighten me on the moth balls

  6. #16
    Mongoose's Avatar
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    I gave mine more air by drilling a 2inch hole on both sides of the seat moulding towards the back. As I ride in the ocean, I was happier doing this, than opening anything up at the front of the ski.

  7. #17
    txgp1300r's Avatar
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    Side gap yer plugs...20 rpm gain

  8. #18
    Duke's Avatar
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    Quote Originally Posted by txgp1300r View Post
    Side gap yer plugs...20 rpm gain
    indexing is another 20...

  9. #19
    cfgp927's Avatar
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    speed secrets

    Go on a diet, both you and your ski. Concentrate on shedding weight from the front of the ski. This will help with bow lift. Lighter weight means you need less HP to move.
    Mike

  10. #20
    Speedaddict's Avatar
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    Quote Originally Posted by hydrotoys View Post
    Lose 70lbs, for approx 1mph speed increase. You or the boat!
    If you got one of those good GPS, lose 20 and you'll see a difference in acceleration.

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