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  1. #1
    Hammy's Avatar
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    Ultra 260x Supercharger issue - overheating ?

    Hi
    I'm wondering to know if anyone have ever heard about any cases of ultra supercharger becoming very hot. By that I mean more that 200°F . My friend had this issue this afternoon and since then we decided to get the ski of the water. Also he mentioned that the ski would only go to 7000 rpm instead of the usually 7450 rpm? Any idea ?


  2. #2
    There is only one thing that it can be. One or more of the bearings has failed. Does one end of the S/C heat up first? You should also hear a roar or whine. Unfortunately the S/C is not a rebuild item. The clearances are so tight all parts must be perfect and assembly must be done in factory jigs.

    Hope you are still in warranty.

  3. #3
    Actually more than one thing can go wrong when the s/c gets very hot. The soft rubber-like coating on the s/c rotors will flake off and now there is too much clearance between the rotors - that is VERY critical for producing full boost and rpm. Easy to check. Just remove the top/outlet exhause manifold of the s/c and you will see rotor surface.

  4. #4
    brisyl's Avatar
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    Quote Originally Posted by Hammy View Post
    Hi
    I'm wondering to know if anyone have ever heard about any cases of ultra supercharger becoming very hot. By that I mean more that 200°F . My friend had this issue this afternoon and since then we decided to get the ski of the water. Also he mentioned that the ski would only go to 7000 rpm instead of the usually 7450 rpm? Any idea ?
    If it was only turning 7450 rpm, there was something wrong right from the beginning cause a 260x should turn around 7900 rpm

  5. #5
    Hammy's Avatar
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    Hi,
    Around 7450rpm... probably because of a bad impeller pitch.
    So it's his supercharger bearing messing out ? What alternative does he have instead of getting a new OEM supercharger ? Anyone know how to get a rotrex supercharger or a vortech for ultra 260 ? I ve been searching for a dealer but can't find ?

  6. #6
    brisyl's Avatar
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    Quote Originally Posted by Hammy View Post
    Hi,
    Around 7450rpm... probably because of a bad impeller pitch.
    So it's his supercharger bearing messing out ? What alternative does he have instead of getting a new OEM supercharger ? Anyone know how to get a rotrex supercharger or a vortech for ultra 260 ? I ve been searching for a dealer but can't find ?
    If he go with something else then the oem he better be prepared to throw big money, at least 2 to 3 time more then the oem

  7. #7
    brisyl's Avatar
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    Quote Originally Posted by Hammy View Post
    Hi,
    Around 7450rpm... probably because of a bad impeller pitch.
    So it's his supercharger bearing messing out ? What alternative does he have instead of getting a new OEM supercharger ? Anyone know how to get a rotrex supercharger or a vortech for ultra 260 ? I ve been searching for a dealer but can't find ?
    If the prop is why the rpm is so low, that is no good, it's putting to much load on the engine and if he keep running it that way it's going to cost him more then a sc. The rpm shouldn't be lower then 7750 and more around the 7800 to 8000 rpm

  8. #8
    Hammy's Avatar
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    ok here is the news,
    we changed his supercharger with another OEM one today, then we went for a test... 7800 rpm wot.
    The pitch was not the problem. Apparently, it was the supercharger.

    Thanks to everybody for your help.

    Problem solved.

  9. #9
    brisyl's Avatar
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    Quote Originally Posted by Hammy View Post
    ok here is the news,
    we changed his supercharger with another OEM one today, then we went for a test... 7800 rpm wot.
    The pitch was not the problem. Apparently, it was the supercharger.

    Thanks to everybody for your help.

    Problem solve.
    :

  10. #10
    the wotman likes boobs wotman's Avatar
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    Quote Originally Posted by brisyl View Post
    If it was only turning 7450 rpm, there was something wrong right from the beginning cause a 260x should turn around 7900 rpm
    never seen a stock 260 pull 7900 rpm

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