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  1. #1

    Advance timimg and Porting for GPRs

    People Hi

    After doing some searche about porting and timing we here in greece decided to go for it.

    The skis we have are 2005 and 2006 GPRs with full stage 2 and VF3

    We have the following questions.

    Is the ski relaible?
    what is the maximum hours i can go with porting?
    How many of you did you go for porting and timing?
    What are the benefits of speed?


  2. #2
    WATER WOODY's Avatar
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    Quote Originally Posted by GREEK GP1300R View Post
    People Hi

    After doing some searche about porting and timing we here in greece decided to go for it.

    The skis we have are 2005 and 2006 GPRs with full stage 2 and VF3

    We have the following questions.

    Is the ski relaible?
    what is the maximum hours i can go with porting?
    How many of you did you go for porting and timing?
    What are the benefits of speed?



    1-porting stock cylinders and a timing keyway is a good choice for reliability.Anytime you bore to make more power,its gets harder on the parts.The key is to make sure these motors have plenty of fuel and the must be tuned correctly.

    2-There is no magic # anytime you mod these things.If you dont get a crank failure,water injestion etc....you should get alot of hours on it.

    3-Alot of us have some kind of porting done.The timing key on the 03-07 GPR is a house hold name.

    4-The benefits of speed is going out and spanking whatever you see.

  3. #3
    WATER WOODY's Avatar
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    Glad to see you found the GREENHULK.NET. Home of the 'heavy hiters'

  4. #4
    just GOT TO DO IT! great lakes gpr 1200's Avatar
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    Quote Originally Posted by WATER WOODY View Post
    Glad to see you found the GREENHULK.NET. Home of the 'heavy hiters'

    well I am trying

  5. #5
    If you run timing I would recommend using the free flo and make sure to keep lower compression in the rear cilynder in addition to 93 octane fuel .

    This is what I have recommended to those with porting and heads with higher compression, to keep the ski reliable, Porting is a must if you are looking to get the max out of the ski.

    I have a few keys available if interested.

    Fercho 713-875-1812

  6. #6
    GPR114's Avatar
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    Fernando, Does the free flow mod help the 1300 with no porting? I have a key in and the boat just doesn't leave hard. Any suggestions on EFI settings. Cut head (155 psi) and efi controller. Set up loose it ran 75.5 but set up for CC it just doesn't leave very well. I do have the Jet Works set up yor way. Will the free flow help?

  7. #7
    The free flow should yield a better bottom end with a slight lost on top. Which key do you have???

    Don give me a ring tommorrow so we can talk props.


    Fercho

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