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Thread: PSI Waterbox

  1. #1
    WKUalum's Avatar
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    PSI Waterbox

    Has anyone ever owned or used one of these? Good bad indifferent? Thoughts?

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  2. #2
    What is the advertised benefit? Not sure what kind of improvement that could possibly offer?

    I'm just south of you by a few miles. Near Ann Arbor. What lake do you ride on?

  3. #3
    WKUalum's Avatar
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    I would say the only benefit would be a more throaty sound. I ride on Lake Fenton sometimes or some down around Brighton. We have a travel trailer though and my wife pulls the skis and I pull the trailer so we go all over. Just recently rode Lake St. Clair with a buddy. It was awesome! Going back on Saturday.

    Quote Originally Posted by Viper Pilot View Post
    What is the advertised benefit? Not sure what kind of improvement that could possibly offer?

    I'm just south of you by a few miles. Near Ann Arbor. What lake do you ride on?

  4. #4
    Go for it then, as long as it doesn't cause backpressure or scavenging issues. I know our skis can be sensitive to those matters. If it runs well, it runs well. Send me a PM when you're going out next season. Hopefully I'll be back on the water by then.

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Have not seen many PSI water boxes at all. Prob no different than any other after market one. Maybe a slight increase in acceleration with more increased noise levels.

    You do also have a PSI expansion pipe though. Normally are dry pipes and can add a little more performance as well.

    With both installed, might make a noticeable difference as opposed to stock configuration. Not a ton though.

    That fuel pump relocation bracket is not common.

    The Ocean Pro Vortex flame arrestors are an upgrade also.

    You might have something special there. Those are 3 of the PSI performance parts they offered back in the day.

    What carbs do you have installed? A pic would be nice.

    Any other bolt on like intake grate or ride plate?

  6. #6
    BlueFishCrisis's Avatar
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    Was trying to figure out what was going on with the water rail then realized it was a drive shaft. Shut off and water separator are not connected either.... Is this a work in progress photo?

  7. #7
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    I bought the waterbox from a guy parting it out. I paid $60 for the box and $40 for shipping. I've heard mix reviews on dry pipes so I was leary to buy it. Heard you need to do some rejetting etc. Not sure what other goodies are available on this but I can ask. It's a 750 I believe.

    Quote Originally Posted by xlint89 View Post
    Have not seen many PSI water boxes at all. Prob no different than any other after market one. Maybe a slight increase in acceleration with more increased noise levels.

    You do also have a PSI expansion pipe though. Normally are dry pipes and can add a little more performance as well.

    With both installed, might make a noticeable difference as opposed to stock configuration. Not a ton though.

    That fuel pump relocation bracket is not common.

    The Ocean Pro Vortex flame arrestors are an upgrade also.

    You might have something special there. Those are 3 of the PSI performance parts they offered back in the day.

    What carbs do you have installed? A pic would be nice.

    Any other bolt on like intake grate or ride plate?


  8. #8
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by xlint89 View Post

    Thanks so much for the info. Having a little buyers regret now after reading it. Was hoping to be able to use it on my sltx 1050. Seems maybe it was made specifically for the SL 6t0/750 models and is more of a silent exhaust.

  10. #10
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Normally Fuji and domestic waterboxes don't mix.

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