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  1. #1

    GPR Impell Pitch

    People
    i have a GP1300R which is loaded with evrything including VF3 except porting and timing key
    The impeller which i have on is the 14/20 Dynafly.
    When i drive the GPR i see the engine is loading up to 7100 Rpm
    but the speed with Gps it goes only up 69 miles.

    I want to repitch the impeller
    How can i do it?
    How can i find the tool to measure the pitch ?

    i dont have the tool
    please help

    also can i use deferent impeller than solas?


  2. #2
    Mik72e's Avatar
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    When you say it has evrything please list your mods becuase with a 14/20 yoyu shoudl be at least 73mph but we nned to know what hull set up your running re pitching is not your answer.

  3. #3
    Quote Originally Posted by Mik72e View Post
    When you say it has evrything please list your mods becuase with a 14/20 yoyu shoudl be at least 73mph but we nned to know what hull set up your running re pitching is not your answer.
    Here is my list


    Riva Stage 1 and stage 2 and VF3.

    EFI
    RIDE PLATE
    Trim Tabs
    VF3
    Riva Head 150 Psi girdle kit
    Air Filter
    SOlas 14/20
    Intake
    Auto Drop Nozzel
    Free Flow
    D Plate

  4. #4
    Mik72e's Avatar
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    Greek GP1300R wher are you located

    The FF will cost you about 40rpms if you want top end put the SS back in.
    What ride plate RIVA or R&D or a modified plate
    Trim tabs will cost you speed.

    I still think you shoudl be a 73mph easy are you sure when you install the pump plug kit its not hanging lower than the hull

  5. #5
    Quote Originally Posted by Mik72e View Post
    Greek GP1300R wher are you located

    The FF will cost you about 40rpms if you want top end put the SS back in.
    What ride plate RIVA or R&D or a modified plate
    Trim tabs will cost you speed.

    I still think you shoudl be a 73mph easy are you sure when you install the pump plug kit its not hanging lower than the hull
    Mike also i have the pump kit installed

    Ride plate is riva

    I dont know what is the problem.

  6. #6
    Mik72e's Avatar
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    If the pump shoe is sitting lower than the hull after the install will cuase loss of speed causing drag and if you ride plate is lower that the pump shoe or hull it will cost you speed as well.

  7. #7
    Quote Originally Posted by Mik72e View Post
    If the pump shoe is sitting lower than the hull after the install will cuase loss of speed causing drag and if you ride plate is lower that the pump shoe or hull it will cost you speed as well.
    i will take some picture and send them to you but i think everything is fine
    all things are in the correct position

  8. #8
    Hydrotherapy's Avatar
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    Quote Originally Posted by GREEK GP1300R View Post
    Mike also i have the pump kit installed

    Ride plate is riva

    I dont know what is the problem.
    did you grind down the ppk to fit or just bolt it up

  9. #9
    Moderator OsideBill's Avatar
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    Are the trim tabs Riva? if so this will scrub speed too, they need to be trimmed. here is something everyone should read. http://greenhulk.net/forums/showthread.php?t=72314

  10. #10
    Quote Originally Posted by Hydrotherapy View Post
    did you grind down the ppk to fit or just bolt it up
    +1, the pump shoe height is critical.

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