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Adapting A Gm Alternator To A L134 And Pulley Selection

Discussion in 'Flat Fender Tech' started by ojgrsoi, Jan 2, 2022.

  1. Jan 2, 2022
    ojgrsoi

    ojgrsoi Retired 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Weatherford, TX
    Joined:
    Dec 30, 2002
    Messages:
    2,178


    Good info and explanation of pulley & belt selection when changing to 10SI or 12SI GM alternators. It appears that the correct belt could also slightly impact the RPMs of the fan and water pump.
     
  2. Jan 2, 2022
    CHUGALUG

    CHUGALUG Member

    Silverton, OR
    Joined:
    May 11, 2019
    Messages:
    203
    No need to buy a special tractor Alternator. Just go to somewhere like Speedway Motors and buy a Pulley for a Ford Flat head V8 and put it on the alternator of your choice. You can get them in Steel or Aluminum. Made to perfectly fit a 5/8" belt
     
    Lockman and Ol Fogie like this.
  3. Jan 3, 2022
    Buster1

    Buster1 Member

    Ft Worth
    Joined:
    Aug 8, 2021
    Messages:
    53
    Thanks for sharing that Mark. When I replaced my crank pulley I was more concerned about pulley groove size and alignment of all the grooves/belt. I hadn’t considered the size of the pulley and how that affects RPM of the other pulleys.

    Thanks!
     
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