Page 1 of 6 1 2 3 ... LastLast
Results 1 to 10 of 55
  1. #1
    philip_gpr's Avatar
    Join Date
    Dec 2005
    Location
    Canada
    Posts
    2,724
    +1
    3

    Let's do a speed chart - numbers needed!!

    A couple of years ago Wetwolfe created a graph showing what results people were getting. It was a simple chart that showed for different rpms and impeller pitches what speeds people were seeing.

    This way everyone could compare their ski to others to see if it was above or below average.

    I am willing to do something similar and create a current chart.

    In order to do this I would need as many rpm and speed numbers as possible.

    When I create the chart(s) I won't show who is doing what. I'll just show a plot of the rpm vs the speed for a specific impeller pitch.

    I think this would be of help to many of us - so if you are interested post your numbers here or if you want to keep your name confidential send me a PM or e-mail. If I get enough response I'll plot them.

    [email protected]

    If you want to participate please send me (or post) the following information

    1) motor size
    2) EFI or carbs
    3) rpm
    4) impeller model and pitch
    5) whether riding position was superman (yes or no)
    6) grate 1200 or 800
    7) speed

    thanks, philip
    Last edited by philip_gpr; 10-06-2006 at 01:24 PM.


  2. #2
    r33pwrd's Avatar
    Join Date
    Mar 2006
    Location
    Sammamish Washington
    Posts
    4,216
    +1
    360
    1. 1300
    2. EFI
    3. 7240
    4. Solas 14/20
    5. NO
    6. 71.4 mph

  3. #3
    r33pwrd's Avatar
    Join Date
    Mar 2006
    Location
    Sammamish Washington
    Posts
    4,216
    +1
    360
    Ow I added a #6 for you

  4. #4
    MPower's Avatar
    Join Date
    May 2005
    Location
    Raleigh, NC
    Posts
    3,338
    +1
    121
    ill represent the low end of the graph

    1) 1200
    2) carbs
    3) 7180
    4) NuJet 6.5 -- 12/18.5
    5) superman @ 69.9

  5. #5
    jgustman's Avatar
    Join Date
    Apr 2006
    Location
    Cottonwood, Mn
    Posts
    133
    +1
    5

    Post

    1. 1200 stock porting, 143 psi head.
    2. stock carbs
    3. 7310 rpm
    4. trued dynafly 14/20
    5. superman
    6. 75.6 mph

  6. #6
    txgp1300r's Avatar
    Join Date
    Apr 2006
    Location
    Dallas , Texas
    Posts
    3,382
    +1
    165
    1.1300 stock port
    2.efi
    3.7080 rpm
    4.solis dynafly 14/20 out of the box ,05 pump
    5.on the seat
    6.73.0 garmin etrex

  7. #7
    Me Hahn and Joe H204YOU's Avatar
    Join Date
    Jan 2006
    Location
    Panama City Beach Florida
    Posts
    1,535
    Wifes ski 2000 model
    1. 1200-unported-stock reeds
    2. Stock carbs W/tampercaps
    3. 7110-7140 before tach went whacky
    4. 14/20 speedcut depitched to 19-3/4 W/washer
    5. No superman-Still tuning the hull
    6. 72.0

  8. #8
    GPKiwi's Avatar
    Join Date
    Sep 2006
    Location
    New Zealand
    Posts
    138
    Is this for just GPR's, or will you make up other charts for the other models?

  9. #9
    ABBOTT's Avatar
    Join Date
    Jul 2005
    Location
    Birmingham, AL / Lay Lake
    Posts
    3,736
    +1
    96
    my 2003 Crayola Boat

    1) 1490cc
    2) 48mm Blackjacks
    3) 7220
    4) Solas DF Repitched to a 15/24
    5) Superman
    6) 81.4 mph

    These were my Mudbug numbers. My run was about 9:15 Saturday morning in the radar line-up in Morgan City. Temp was about 84F at that time. No idea on Humidity or barometer. Elv was 0 ft.

  10. #10
    Duke's Avatar
    Join Date
    Jul 2006
    Location
    Florida
    Posts
    10,004
    +1
    406
    1. 1200 unported
    2.carbs
    3.7190
    4.14-20 DF box stock
    5.no
    6.72

    Should we include nozzle size? My #s were with an 87mm. 85mm usually drops rmps by 50 and increase speed by 1 mph.

Page 1 of 6 1 2 3 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. RIVA Boyesen Reed Stuffer Kit Do They Really Work I Need Some Info
    By Gio GP1200R in forum Yamaha PWC Performance (2-stroke)
    Replies: 7
    Last Post: 09-05-2008, 03:50 PM
  2. 08 Top Speed/Acceleration Numbers
    By ph2ocraft in forum Honda Open Discussion
    Replies: 13
    Last Post: 01-02-2008, 06:05 PM
  3. Lets Play! GUESS MY SPEED!
    By Chrisrokc in forum Yamaha PWC Performance (2-stroke)
    Replies: 23
    Last Post: 05-22-2007, 02:21 AM
  4. How do these speed runs compare with yours???
    By 1 FAST VE in forum 4-Tec Performance
    Replies: 6
    Last Post: 04-03-2007, 06:51 PM
  5. Speed chart
    By philip_gpr in forum Yamaha PWC Performance (2-stroke)
    Replies: 9
    Last Post: 01-06-2007, 12:01 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
  •