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  1. #1

    GPR Riva Performance Pump Cone

    What does the performance pump cone do exactly? Does it really do anything? Is it worth it? I am not looking for a top speed machine just a fast all around ski.


  2. #2
    yz450f's Avatar
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    i think it is to reduce cavitation
    mabey a little top speed not much tho

  3. #3
    Moderator OsideBill's Avatar
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    Nothing, don't waste your money.

  4. #4
    African-American
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    its R&D's version of a paper weight

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    Question H O R&D pump cone?

    I know the pump cone on the old style concord style small hub gpr pumps was not very good and slowed you down a few tenths but has anyone ever tested the H O pump with the cone they now make for the H O pump. Remember everything is different with the big H O style pump and a dyna fly prop, Just because it was a bust with the old small hub pump don't mean the results will necessarly be the same, big hub H O (75mm) , smaller reduction nozzle (85mm) of the H O and a dyna fly prop this new cone might work, I am not sure , anybody got any reliable test data? Tommy Jordan

  6. #6
    Happily Self-Employed WFO's Avatar
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    Shooter said he had a gain with the HO and the R&D pump cone.

  7. #7
    Moderator OsideBill's Avatar
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    What outlet nozzle?

    Oldschool if your ski is a 00 like your sig says and has the original pump the cone does nothing.

  8. #8
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    Quote Originally Posted by WFO View Post
    Shooter said he had a gain with the HO and the R&D pump cone.
    yeah i have a R&D billet HO pump cone, just no HO pump

    it does make a nice paper weight

    .. not for too much longer

  9. #9
    Yes mine is in fact an 00' Right now it is quite stock but while I have the pump area open to do some mods, I was just trying to figure out what all I would need so I can "try" to do it just once.

  10. #10
    2000 GPRXP 4tec shooter98xpl's Avatar
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    I had an old style 00 pump on my ski as well with the R&D cone. I tested it back to back with the stock cone and noticed no difference, not even in holeshot.
    But, with the HO pump and the new R&D cone for that pump, I gained .5 mph on top end from it. I also had better hole shot and midrange with it, but no real way to tell how much, it was just how the ski felt to me. I was told that this can't be true, but try it out on your ski, it worked for me. Its been on my ski and haven't taken it off since and won't either. Back to back test, actually tried several times to see if my gain was just a fluke, but I was always .5 mph faster on top end over the stock cone. Its staying.
    I am running a 14/23 through 85 mm nozzle.
    SHOOTER

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