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  1. #1

    Free Flow Exhuast

    i have a 2002 gpr and i was looking to put a free flow exhaust on it. is it worth buying and how much speed will i get if any from it


  2. #2
    My son (mohawk man) jeffsntx's Avatar
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    http://www.greenhulk.net/forums/show...ight=Free+flow

    This is just one of the many discussions that are on the forum. If you use the search function you will find MANY more.

  3. #3
    One day at a time..... N8R's Avatar
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    Quote Originally Posted by bradgfh View Post
    i have a 2002 gpr and i was looking to put a free flow exhaust on it. is it worth buying and how much speed will i get if any from it
    you will lose a little top speed but, have a better low end punch. my ski seems to run cooler with the freeflow and better access to the rear of the ski.

  4. #4
    mrbtd's Avatar
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    IMO....If you like loud do it. Between 3K and 5K rpm's the soundlevel is annoying. Above and below the 3K and 5K there isnt much difference in the sound.

  5. #5
    WATER WOODY's Avatar
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    Depending on how your motor is set up,a free flow will help prevent that nasty DETONATION!

  6. #6
    philip_gpr's Avatar
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    To directly answer your question with a FF you are louder and you are slower.

    Yes a FF will reduce the risk of detonation.

    Another choice to lower the risk of detonation is to change the timing. There are quite a few skis running compression as high as 170 lbs not using a FF and they don't have a detonation problem - they are able to do this by reducing the timing.

  7. #7

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    Quote Originally Posted by philip_gpr View Post
    To directly answer your question with a FF you are louder and you are slower.
    There has to be a way to get around the speed lost.

  8. #8
    just GOT TO DO IT! great lakes gpr 1200's Avatar
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    Check this out?

    Here is a new recipe for a great working free flow:
    3” schedule 40 PVC 45* elbow $2.49

    Reducer schedule 30 to schedule 40 (adapter some people call it) $4.79 This part makes the orfice.
    Schedule 30 street elbow 90* …. Cut the female end off form it.
    The reducer makes an orfice by making the ID 2.75".
    The idea that I made this for is to maintain back psi, but have a SMOOTH Bore that a works great with a jet works kit.
    please take it for what it is worth.

  9. #9
    Moderator RX951's Avatar
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    Quote Originally Posted by great lakes gpr 1200 View Post
    Here is a new recipe for a great working free flow:
    3” schedule 40 PVC 45* elbow $2.49
    Reducer schedule 30 to schedule 40 (adapter some people call it) $4.79 This part makes the orfice.
    Schedule 30 street elbow 90* …. Cut the female end off form it.
    The reducer makes an orfice by making the ID 2.75".
    The idea that I made this for is to maintain back psi, but have a SMOOTH Bore that a works great with a jet works kit.
    please take it for what it is worth.


  10. #10
    WATER WOODY's Avatar
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    And the finish product looks like this! You need to cut your stock rubber elbows with the straight pipes.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by WATER WOODY; 05-02-2007 at 09:50 PM.

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