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  1. #1
    dnielsen's Avatar
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    Has anyone stuffed the pump, newer hulls?

    Was just wondering if anyone is running sufficient speeds on the newer hulls (say a 12PX) to cause the pump to stuff as compared to the older hulls (08PX). Who is running in the 80+ mph range on one of these without PRVs?


  2. #2
    GGG's Avatar
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    I'm also interested in info for the gtr if anyone is in the 80's with that

  3. #3

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    Quote Originally Posted by dnielsen View Post
    Was just wondering if anyone is running sufficient speeds on the newer hulls (say a 12PX) to cause the pump to stuff as compared to the older hulls (08PX). Who is running in the 80+ mph range on one of these without PRVs?
    My 2010 RXTX is stuffing. If I run the 83mm or 85mm nozzle she stuffs at WOT around 80-81+ MPH while accelerating. When I install the 87mm nozzle she will run 83.1 but will stuff off throttle.

    There doesn't appear to be enough room to install PRV fittings/valves in the pump or pump shoe. It has been suggested to me that I may need to install the fittings directly into the skis tunnel area.

    I hope someone is working on a solution as I don't want to bounce..

  4. #4
    dnielsen's Avatar
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    Quote Originally Posted by Glade Rider View Post
    My 2010 RXTX is stuffing. If I run the 83mm or 85mm nozzle she stuffs at WOT around 80-81+ MPH while accelerating. When I install the 87mm nozzle she will run 83.1 but will stuff off throttle.

    There doesn't appear to be enough room to install PRV fittings/valves in the pump or pump shoe. It has been suggested to me that I may need to install the fittings directly into the skis tunnel area.

    I hope someone is working on a solution as I don't want to bounce..
    Yep, need to relieve pressure before the prop or open up the path of resistance behind the prop. Through the fiberglass in the tunnel would work fine but would need to redirected to vent outside the hull and the fittings would need to be spot on fail safe type to avoid a blowout resulting in a sunken ski. Not a major hurdle in any case, I'm sure if I had the ski I could easily come up with something.

  5. #5

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    Quote Originally Posted by dnielsen View Post
    Yep, need to relieve pressure before the prop or open up the path of resistance behind the prop. Through the fiberglass in the tunnel would work fine but would need to redirected to vent outside the hull and the fittings would need to be spot on fail safe type to avoid a blowout resulting in a sunken ski. Not a major hurdle in any case, I'm sure if I had the ski I could easily come up with something.
    Machined down stainless steel thru hull bildge type fittings should work.

    Was concerned about hull strength in the tunnel area.

  6. #6
    dnielsen's Avatar
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    Quote Originally Posted by Glade Rider View Post
    Machined down stainless steel thru hull bildge type fittings should work.

    Was concerned about hull strength in the tunnel area.
    Don't think the tunnel strength would be an issue being you would be making circular (maybe two 1" or 3/4" holes) cuts in the fiberglass. Would also be a good time to layer some added fresh fiberglass to the tunnel just for insurance. These would also need to be valved or the machine would cavitate on acceleration.

  7. #7
    1-877-JET-PROS BigBoost's Avatar
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    Quote Originally Posted by dnielsen View Post
    Was just wondering if anyone is running sufficient speeds on the newer hulls (say a 12PX) to cause the pump to stuff as compared to the older hulls (08PX). Who is running in the 80+ mph range on one of these without PRVs?
    THE 2012 rxpx will buck at 82 mph and will also go end over end must use 2 prvs.

  8. #8
    Eric Ocman's Avatar
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    Quote Originally Posted by BigBoost View Post
    THE 2012 rxpx will buck at 82 mph and will also go end over end must use 2 prvs.
    whoa! not much difference huh?

  9. #9
    "Hustler" Inkaddict's Avatar
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    Quote Originally Posted by BigBoost View Post
    THE 2012 rxpx will buck at 82 mph and will also go end over end must use 2 prvs.
    Theres 3 in nj running over 82 with no over stuff... ones been 86+ with a little bounce... No relief valves in any of them...

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  11. #10
    Martin RXT-X's Avatar
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    Quote Originally Posted by BigBoost View Post
    THE 2012 rxpx will buck at 82 mph and will also go end over end must use 2 prvs.
    I have ran 82 on my 2012 RXPX with no bucking.

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