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Thread: pumps

  1. #1
    tubetent's Avatar
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    pumps

    what are differences and advantages of replacing old pump with new ho pump?. thinking of putting ho pump on 99xl 1200.


  2. #2
    GPryan's Avatar
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    I think this is a great question and one that I haven't seen much.

    I'm going to guess that it's an all around better performer. Better hook-up and better top end. Just all around more efficient.

  3. #3
    fenn's Avatar
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    i'm curious too, i have an 04 with a non HO pump

  4. #4
    JKR1300's Avatar
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    HO pump is a must have on a GPR if your looking for top speed. It's a more efficient design. On my '03 I was told to not waste my $ on VF3's etc unless I switched to the HO pump.I don't think I'd spend the money on an older XL, though.

  5. #5

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    I agree, if you have a broken pump, then it might be worthwhile to upgrade on an XLL or XLT, but I don't think so just for the sake of upgrading.
    BTW, you said yours is an XL, is it not an XLL? Because if not, its not a candidate for either the HO pump, or the 1390. It has to be a power valve motored 1200.

  6. #6
    Moderator RX951's Avatar
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    I would make sure you have a few mods to take advantage of the potential of the HO stator. There is roughly a 1.5-2 mph gain using the HO pump stator on a Stage II GPR. So...with that said, there is also better hookup on the pump due to its larger hub. but again, typically, these HO pumps are added when some mods are done to the ski.

    Here were my results on a Stage II GPR. Back to Back test too.
    http://greenhulk.net/forums/showthre...ght=pump+worth

  7. #7
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    make sure you add the 2" spacer as well as thats a key part of the improved hookup.

  8. #8
    Quote Originally Posted by izz0 View Post
    make sure you add the 2" spacer as well as thats a key part of the improved hookup.
    not necessary on the XLL/XLT platform

  9. #9
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    Quote Originally Posted by ISLANDRACING View Post
    not necessary on the XLL/XLT platform

    silly me, for some reason i alwasy seem to think the gpr is the only ski anyone would ever own

  10. #10
    Quote Originally Posted by izz0 View Post
    silly me, for some reason i alwasy seem to think the gpr is the only ski anyone would ever own


    ...and technically its really not "necessary" on the GPR. The conversion can be done without the extension as the majority of the performance is coming from the pump.

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