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  1. #1

    Proper Way to Set Slip on Supercharger (137 wheel)

    QUESTION: Does it matter which bolt you turn to set supercharger clutch slip--either the impeller cap nut (A in attachment) or the hex nut on the clutch (P in attachment)? I have seen it done both ways. Obviously, the gear holding tool is used to hold the gear in place when setting slip.

    Second time installing a 137 wheel on my 2006 RXT 215. First go around end up with the shaft shearing (see link below). The little info I can find on this type of failure indicates that the slip is set too high. If so, I want to avoid doing so.

    I purchased a new 137 wheel from Greenhulk and am using a new OEM supercharger rebuild kit. Also using the Riva (McMaster) slip washers (soaked in oil for installation). Riva instructions state slip should be 14-15 foot pounds. Some forum postings recommend setting at 16 pounds, knowing break in will bring the slip to 15 foot pounds.

    Thanks for the help.
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  2. #2
    These aren’t like the newer superchargers. Both nuts must be torqued to a fixed value. I believe off hand it’s 22lbft and 24lbft respectively. To change the slip moment change the spring washer configuration and/or add shims. In mine I used the factory configuration with a .2mm shim.

  3. #3
    tiderider's Avatar
    Join Date
    Oct 2018
    You'll need a shim or shims to get it right. I set slip to 16 lbft or slightly higher.

  4. #4
    Mod less, ride more! troyheb's Avatar
    Join Date
    Jul 2007
    Nederland, Texas
    Your shaft probably broke because the hex nut on the clutches was over torqued.

  5. #5
    SplishSplash's Avatar
    Join Date
    May 2006
    Belle River Ont Canada
    Cap "A" will have ZERO impact on the slipping moment. That is all controled at the rear nut and washers. You could remove Cap A and the slipping moment would be unaffected. If your using that to set slipping, leave your SC alone.

  6. #6
    Thanks for info. Appears I misunderstood the (lack of) directions in the shop manual.
    Attached Thumbnails Attached Thumbnails Supercharger.pdf  

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