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Technical Flathead crank pulley question

Discussion in 'The Hokey Ass Message Board' started by hotrodman303, Dec 6, 2020.

  1. hotrodman303
    Joined: Jan 7, 2017
    Posts: 273

    hotrodman303
    Member

    I have 1950 engine that has truck water pumps and a 1948 crab style Mallory distributor. What crank pulley do I need to clear the distributor and has wide belts


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  2. 41fastback
    Joined: Sep 25, 2005
    Posts: 360

    41fastback
    Member

    This has been asked in the past. Try searching.
     
  3. alchemy
    Joined: Sep 27, 2002
    Posts: 20,524

    alchemy
    Member

    Can that even be done? Eyeball down the pulley sideways and see if there is clearance in there for that distributor. Even on the trucks I'm pretty sure one of the pumps feeds the front sheave of a crank pulley and the other pump gets the rear. One of them feeds the generator up top, and the other feeds the fan. I think the rearward crank pulley places that rear belt too close to the distributor, but I may be wrong. I'm pretty much a 48 and older flathead guy.
     
  4. Post a picture of what you have - post 1948 flatheads should be a side mount distributor - unless it's been modified to run a front mount distributor.
     

  5. Marty Strode
    Joined: Apr 28, 2011
    Posts: 8,912

    Marty Strode
    Member

    The truck pumps I have used are driven with one belt. But I think you will find clearance issues with the crab and truck pumps.
     
  6. Marty Strode
    Joined: Apr 28, 2011
    Posts: 8,912

    Marty Strode
    Member

    I tried to make it work, when I started playing with Flatheads some 22 years ago, without any luck. 2013-04-04 173646.jpg
     
  7. Frames
    Joined: Apr 24, 2012
    Posts: 5,153

    Frames
    Member

    2020-12-05 19.35.19-5.jpg GOODSGUYS   PACKARD 018.JPG 2020-12-05 19.35.19-5.jpg I cut the slinger part off in a lathe. this engine is for a vintage modified roadster drag car. 1/2 " Scat stroker. did the same thing to my 27. 2020-12-05 19.35.19-5.jpg
     
    Last edited: Dec 6, 2020
  8. 41fastback
    Joined: Sep 25, 2005
    Posts: 360

    41fastback
    Member

  9. alchemy
    Joined: Sep 27, 2002
    Posts: 20,524

    alchemy
    Member

    So a 49 truck pulley will fit if he trims off the rearward timing indicator surface? Then runs the fan off the front pulley? So the generator and both pumps are run off the rear pulley?
     

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