How do you ID clutch finger ratios?

Discussion in 'PSI Superchargers Tech Questions' started by nmro2114, Aug 3, 2013.

  1. nmro2114

    nmro2114 Member

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    How can you tell the difference between a .156 and a .125 finger? I have some of each and they both look the same. What am I overlooking?
     
    #1
    nmro2114, Aug 3, 2013
  2. kosky racing

    kosky racing Comp Eliminator

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    fingers

    What make of clutch ___I believe they are the measurement of the width of the finger
     
    #2
    kosky racing, Aug 3, 2013
  3. Sandracer695

    Sandracer695 Member

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    If its a centrifugal clutch it is the radius of the lever (finger).
     
    #3
    Sandracer695, Aug 3, 2013
  4. nmro2114

    nmro2114 Member

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    AFT fuel clutch. the fingers are .375 wide
     
    #4
    Last edited: Aug 3, 2013
    nmro2114, Aug 3, 2013
  5. Sandracer695

    Sandracer695 Member

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    Where the lever contacts the button on the pressure ring. That is the radius you are talking about. .093 is less aggressive than a .156
     
    #5
    Sandracer695, Aug 3, 2013
  6. nmro2114

    nmro2114 Member

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    what is the correct way to measure the radius?
     
    #6
    nmro2114, Aug 4, 2013
  7. turbo69camaro

    turbo69camaro Member

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    you can buy a cheap set or radius gauges from MSC or another tool supply place
     
    #7
    turbo69camaro, Aug 5, 2013
  8. A/FUEL392

    A/FUEL392 New Member

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    Look close on the finger, Crower inscribes the radius on the finger and after awhile, it becomes hard to see, lightly sand and you may see what the radius is.
     
    #8
    A/FUEL392, Aug 12, 2013

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