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  1. #1

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    vf3`s and groupk big bore?

    do any of you guys have the gk 1390 with the vforce3`s? and if so were there any rejetting or adjusting to be made on the carbs?


  2. #2
    GPRPITMAN's Avatar
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    I have V forces what carbs where are your jetting specs now?

  3. #3
    I am running a 1390 setup with the cages. No need to rejet

  4. #4

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    fercho,im the one that spoke with you this morning,are you running the 05 pump in your bb?i`ll call you next week i need to discuss the handling package with ya, and a few other things.jeff

  5. #5
    ramnj's Avatar
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    I'm using VF3's also, but haven't been able to test. F*&%ing weather.

  6. #6
    Jeff yes I am running it. Part of the success of the 05 pump in my ski has been the way that I pitch the props in the package!!

  7. #7

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    good deal!!! i cant wait to get started,, im going to look at a 2000 gpr tomarrow,,,i was going to go efi but this ski is in mint condition and i can probably get it for $3000.00 and some pennies hard to pass up a deal like this.

  8. #8
    just GOT TO DO IT! great lakes gpr 1200's Avatar
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    I'm getting a 1390 BB built by group K now.. I need a new impeller. I have the 2002 pump with blue printed vane, They say 14/20 concord.
    Is this the best choise? there is so many types, like set back and such.

  9. #9
    ramnj's Avatar
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    Quote Originally Posted by great lakes gpr 1200
    I'm getting a 1390 BB built by group K now.. I need a new impeller. I have the 2002 pump with blue printed vane, They say 14/20 concord.
    Is this the best choise? there is so many types, like set back and such.
    Stay with a 14/20 until the engine is completely broken in. Then post your speed and RPM's and folks will be able to give you a recommendation.

  10. #10
    carbuff91's Avatar
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    Rafi,

    Looks like a good weekend to get some NUMBERS!!!!

    Lets see em!

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