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  1. #1

    Join Date
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    78mph+ 1200cc GPR single pipe

    Air was not as good as expected, I was down 30rpm turning the 14/20 dyanfly 7300rpm. Looks like the 48mm blackjackets didn't give any rpm gains on my unported 1200 single. There was no current or wind this time and it was almost glass which is actually slower on a GPR. Had a slight bounce which is slowing me down , but didn't have time to tighten the setup.

    Tabs are still at .140" and JIMs plate at just over 1". Can I claim the FASTEST unported 1200cc single pipe????

    dynafly 14/20 at 7300rpm went 77.0mph

    Put the big prop on, it was too big.
    Went 78.3mph at 6750rpm.
    Ran another pass back to back and went 78.1mph.

    Thanks to all who have sold parts to me and helped. Also to Ben Herman for his knowledge on a powerful setup.

    Does anyone has a spare 14/23, 14/24, 14/25 laying around they would be willing to lend me? Maybe it could go 79-80mph ???



  2. #2
    Try not to smile on a Jetski... GPRFrank's Avatar
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    congrats!

    Awesome run!! Congratulations on your times... I had seen a 14/23 in classifieds not to long back.

  3. #3

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    nice job

  4. #4

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    Bullhead City AZ.
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    NICE WORK

  5. #5
    BoostCrzy's Avatar
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    AWSOME speed....but that RPM is DANGER ZONE!!!!.....(but you already know that)....lol.......Hit it with some SPRAY!!!....you should be 81-82mph with a 30 shot....

  6. #6
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Awesome Job Ronn you ski haul azz

  7. #7

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    Apr 2006
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    Thanks, Jim I have not tried your new plate you sent me but I'm sure there is more speed left in it

  8. #8
    Try not to smile on a Jetski... GPRFrank's Avatar
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    [QUOTE=Ronn25;1407960]Air was not as good as expected, I was down 30rpm turning the 14/20 dyanfly 7300rpm. Looks like the 48mm blackjackets didn't give any rpm gains on my unported 1200 single. There was no current or wind this time and it was almost glass which is actually slower on a GPR. Had a slight bounce which is slowing me down , but didn't have time to tighten the setup.
    What are you looking to do with that 14/20 DF

  9. #9

    Join Date
    Apr 2006
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    South MS
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    Quote Originally Posted by BoostCrzy View Post
    AWSOME speed....but that RPM is DANGER ZONE!!!!.....(but you already know that)....lol.......Hit it with some SPRAY!!!....you should be 81-82mph with a 30 shot....
    Yeah I know Actually I would like to hit 80mph on this ski without nitrous Don't know if I can find a prop in time before the weather gets too hot.

  10. #10

    Join Date
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    [QUOTE=GPRFrank;1408415]
    Quote Originally Posted by Ronn25 View Post
    Air was not as good as expected, I was down 30rpm turning the 14/20 dyanfly 7300rpm. Looks like the 48mm blackjackets didn't give any rpm gains on my unported 1200 single. There was no current or wind this time and it was almost glass which is actually slower on a GPR. Had a slight bounce which is slowing me down , but didn't have time to tighten the setup.
    What are you looking to do with that 14/20 DF

    I could send this 14/20 to get pitched but I love how this 1200 runs on it for everyday riding....awesome pull and still knocks down 77mph.

    So I'm looking to keep it for now and just get a big speed prop for top end.

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