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Technical Model A rear hydraulic brakes and track width

Discussion in 'Traditional Hot Rods' started by RJD, Oct 15, 2021.

  1. RJD
    Joined: Jun 20, 2013
    Posts: 14

    RJD
    Member

    Apologies if this question has been asked and answered before but I can't seem to find it amongst the couple of hundred results I get when I search.

    IS THERE A HYDRAULIC CONVERSION FOR THE REAR OF A MODEL A FORD THAT DOESN'T INCREASE TRACK WIDTH?????

    I was planning on running the MT Lincoln set up, it adds 1 1/2 each side and that pushes the wheels right out to the edge of the fenders and looks off.
    40 Ford brake are mentioned a lot but as the drums are a similar width to the Lincoln I assume they push the wheels out too?
    To add to the problem the fun police rules in Australia mean I'd be best off with self-energizing brakes.
    I'd like the option of running wires if possible.
     
  2. ChupaJustin
    Joined: May 7, 2009
    Posts: 12

    ChupaJustin
    Member

    Texas Webb likes this.
  3. RJD
    Joined: Jun 20, 2013
    Posts: 14

    RJD
    Member

    Unfortunately it's the same kit as the MT one and adds 1 1/2 per side. As far as I can tell all of the usual A Model part suppliers sell this same kit.
     
  4. I'll do some measuring. But 99% sure my wheels didn't move out when doing regular ford brakes.
     
    Tim likes this.

  5. How much power are you thinking of putting through that Model A rear? They are not the same as a later V8 diff.

    Wardog (also in Victoria) has a banjo in the back of his Model A. Although fenderless, I don't think he could have it any narrower, therefore, would be fine with fenders.

    I assume you've watched his build thread?
     
    Last edited: Oct 16, 2021
  6. RJD
    Joined: Jun 20, 2013
    Posts: 14

    RJD
    Member

    That would be much appreciated!
     
  7. Glenn Thoreson
    Joined: Aug 13, 2010
    Posts: 948

    Glenn Thoreson
    Member
    from SW Wyoming

    I put '40 brakes on my '29 A-V8 with stock rear end and MT hubs and drums. I don't think there would be a problem. The MT drums have a thicker flange and you need the special studs but the width would be no more than an inch and a half total, not each. I have 8" wide wheels with 235/ 15 tires and even with that the tires only stick out about an inch or so past the fenders in the rear. A bit more so in the front. You should have ample clearance to use wheels with more back set to bring them in a bit if needed.
    See my avatar picture
     
  8. PotvinV8
    Joined: Mar 30, 2009
    Posts: 418

    PotvinV8
    Member

    Boling Bros / Speedway Motors Lincoln brakes on my '30 coupe, front and rear, with '35 wires and 7.00x16 tires out back.

    [​IMG] [​IMG]
     
    Stovebolt likes this.
  9. ThosD
    Joined: Aug 29, 2016
    Posts: 42

    ThosD

    I'm a little late to the party. I recently installed Boling Bros. Lincoln brakes on my '30 coupe. I was not expecting such a wide track. Measured ~58 3/8 inches center to center; 6.00x16 tires on '35 wire wheels.

    IMG_1769[1].JPG
     

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