Results 1 to 6 of 6
  1. #1
    Vern's Avatar
    Join Date
    May 2005
    Grand Haven, MI

    2 - 4 mph speculation

    Wondering about the latest on the GPR platform? Me too ... my take for what its worth is that it is not plate or tabs related. Based on what has been said so far and also some other recent posts, I think the mod involves the intake area, either the grate or the intake tunnel itself. My guess? Intake tunnel modification (material added in the top and/or front of the tunnel) or intake grate change(s) to block water to the top of the tunnel and reduce overstuffing the pump. From what has been said it is not engine related and related instead to the underside of the ski, and IMO the ride plate and tabs have been experimented with intensely ... but not the tunnel or intake grate. In that area, what works on the GPR might also benefit the RXP since the tunnels are similar in size and shape.

    Any others care to speculate?

  2. #2
    EZ Dock of Long Island Shibby1485's Avatar
    Join Date
    May 2005
    Long Island, NY
    pump stuffer insert.... for superjet only

    Pump Stuffer
    The R&D pump stuffer changes the pump cavity shape to increase water velocity and pump efficiency. The R&D stuffer completely occupies the area from the original pump cavity surface to the new redesigned surface. This design eliminates air on the backside of the stuffer which will cause cavitation. The top speed of the SuperJet will increase up to 2 mph.

  3. #3
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Morgan City, LA
    I think it has to do with building the keel up in front of the pump tunnel and/or partially closing off the intake area, more than likely in the front of the pump tunnel where it meets the keel.

    I have been contemplating trying this on the RXP for quite a while now, but just haven't had the balls to do it.

  4. #4
    Join Date
    Aug 2005
    yo sucka's, stay off the yami side

  5. #5
    Quote Originally Posted by SUCKMYWAKE View Post
    yo sucka's, stay off the yami side
    Ya, what he said!

  6. #6
    GP2500R stvdrag225's Avatar
    Join Date
    Sep 2006
    United States
    Hi speed jet boats are comming back big in VA i have ben talking to some of the ones that have some 120-140 MPH boats there is a lot to be gained in the intake and grate as soon as it worms up this spring i will be doing some testing.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Franks 80+ mph videos and results from Saturday
    By Enufpwr in forum 4-Tec Performance
    Replies: 16
    Last Post: 09-11-2008, 01:54 PM
  2. RXP idle-60 mph times?
    By watermedic in forum 4-Tec Performance
    Replies: 11
    Last Post: 08-20-2006, 08:34 PM
  3. 75.9 mph with full tank of gas
    By Green Hulk in forum 4-Tec Performance
    Replies: 25
    Last Post: 07-09-2006, 10:27 PM
  4. 74.6 mph today
    By Green Hulk in forum 4-Tec Performance
    Replies: 8
    Last Post: 07-09-2006, 08:27 AM
  5. why "only" 69.22 MPH?
    By Ed in forum Sea Doo Open Discussion
    Replies: 4
    Last Post: 05-29-2005, 11:00 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts