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Thread: Drive belt tension for a Powerdyne supercharger?

  1. #1
    Join Date
    Aug 2018
    Location
    Jersey City, NJ
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    23
    My Cars
    1995 BMW M3 Coupe

    Drive belt tension for a Powerdyne supercharger?

    Anyone know how much tension there should be in the belt that drives the Powerdyne supercharger from the crank? Too little and it slips. Too much and you over tax the bearings.
    Going to buy a belt tension gauge but need to know how much tension to use to make it worth buying.

  2. #2
    Join Date
    Aug 2018
    Location
    Jersey City, NJ
    Posts
    23
    My Cars
    1995 BMW M3 Coupe
    Based on this calculator my 6 rib micro-v belt should have between 90-125 lbs tension once it has warn in. (installation tension 187.5 if new, 135 if used)
    https://www.gates.com/us/en/resource...ion-calculator

  3. #3
    Join Date
    Jun 2005
    Location
    New England
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    25,402
    My Cars
    F90 M5; E36 M3 Turbo
    Use a little bit less than causes the bearings to fail prematurely. After a few bearing changes, consider a vortech. After the vortech gets boring, go turbo. Ideally, leave well enough alone, be happy with a low boost supercharger.

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