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  1. #1
    Nutties's Avatar
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    Increase of speed and rpm

    Hi guys, every time I ride my ski for the first time of the day it feel sluggish and not very quick but as the day goes on I pick up more speed and rpm and goes heaps harder. Then about 2 weeks later I'll ride it again and it will do the same thing. It will start off at 8120 rpm at 113 kph then it gets better as the day goes on to 8400 rpm at 120kph . I just don't get it!!!!! Does anyone have the same issues?


  2. #2

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    I had a tune from an Australian dealer that felt like it would keep the ski at its stock limiters for the first 15-20 mins then it would allow the speed and rpm to go above. wasn't impressed with the tune at all

  3. #3
    Nutties's Avatar
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    Yeah mate my computer was altered aswell so maybe mine could be doing the same. It's very annoying !!!!

  4. #4
    Nutties's Avatar
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    owhat, did you replace your computer since then or still kept the same mapping.. Who remapped you ecu for you?

  5. #5

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    It was a tune from a dealer in sydney. Since then I have put vtech on.
    at least now the ski runs consistant and pulls a little
    bit more power. The rpm goes up higher then the other tune. I wasn't able to get about 8180rpm but now can go right up to 8400 in fresh water and around 8250 in salt

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  7. #6
    Nutties's Avatar
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    What kph are you getting at 8400 rpm? I'll ride my ski a few more times and see how it goes. If it keeps doing it I'll do the same and upgrade to a better system. All I want is consistency.

  8. #7
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Nutties View Post
    What kph are you getting at 8400 rpm? I'll ride my ski a few more times and see how it goes. If it keeps doing it I'll do the same and upgrade to a better system. All I want is consistency.
    your best bet is the V-Tech tune. The tuning bundles are still on sale right now
    http://www.4-tecperformance.com/inde...oducts_id=2791

  9. #8

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    In the freshwater I was pulling 123km on the dash and that was around 118-119 on the GPS that's at around 8400rpm.. I haven't done much in fresh water.

    I have a 15/19 solas prop in there that could do with some fine tuning to get it running a little better but haven't been to worried since the vtech.

    I was thinking of going the 137+4mm wheel but decided not to however with the vtech it's great not having to pay for a new tune if I decide to. From all reports the 137mm will get me closer to the 137 mark.

    on the data logger the boost with the standard wheel was around 10.3 psi at about 8100 rpm and 11psi around 8250rpm

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