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  1. #1

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    Jun 2012
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    Cool looking for some speed

    i wont to see what i can do to make my 99 Yamaha exciter 270hp faster its ruing 58 on GPS but after being at mud bug for the weekend i wont some more speed but dont wont to put tuns of money into it would it help any to change out the impeller and is there any other simple mods to do for more speed


  2. #2

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    Jun 2012
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    meraux LA
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    no one no anything about jet boats on hear ?

  3. #3

    Join Date
    Sep 2007
    Location
    Edmond, OK
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    http://www.groupk.com/yjetboat.htm Start with props but like everything on a jetboat it cost twice as much as a jetski.

  4. #4
    steve45's Avatar
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    Feb 2008
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    Texas
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    Yep, impellers give the most bang for the buck on boats. After that, expect to spend about $1000/mph increase.

  5. #5

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    Sep 2012
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    Nashville, TN
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    Im in the same boat! 58mph is just not gunna cut it! Im seriously looking into swapping engines.... Something in the supercharged/4cyl variety.

  6. #6

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    Sep 2007
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    Edmond, OK
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    It's going to be a tght fit. I saw where a guy put the 155hp PV motors in an Exciter. He had a lot of issues with those motors. Didn't gain a bunch of speed. I would just hop up what you got or look at a bigger go-fast boat.

  7. #7
    Banned User
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    Sep 2012
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    Grand Cayman, Cayman Islands
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    DCB you might want to look into trim tabs and stuff from GroupK for your boat i picked up 5 mph in my LS by doing so and a few hull tricks a friend did. Currently im at 60.5gps on flat water with 1 person aboard and 1/4 tank top down although i cant say how the Exiter will respond to this but the Ls seems to be the easiest hull to get a few more mph.

  8. #8
    Banned User
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    **littledart i meant sorry even though the Ls is heavier than the others it seem to take better to power adding maybe its something to do with the shape or design of the hull**. Cool

  9. #9

    Join Date
    Jun 2012
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    meraux LA
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    I think the ls hull has something in the shape that helps it with picking up speed and trim tabs will reduce speed they onley help to level the boat and plain it

  10. #10
    Banned User
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    Sep 2012
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    Yea man must be something to it.....the reason i added the tabs was to control the attitude of the boat and to reduce porpoising which works good even tho you might lose a little speed i never did a before and after test i installed them on the boat before i put the fresh motors in.
    The guy that sanded and polished the bottom told me to take them off for more speed so i think i might do that and see what it does then.

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