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Technical Model a strength

Discussion in 'Traditional Hot Rods' started by Corey Wilson, Oct 4, 2019.

  1. Corey Wilson
    Joined: Mar 6, 2018
    Posts: 10

    Corey Wilson

    How hard can you push a stock model a in a drag race. what would brake first and why?

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  2. squirrel
    Joined: Sep 23, 2004
    Posts: 44,310


    40 hp isn't that hard on a car. Even a Model A.
    Jet96, dana barlow, Hnstray and 6 others like this.
  3. Doublepumper
    Joined: Jun 26, 2016
    Posts: 514


    My first thought is spider gears. Over the years there hasn't been many spiders that survived my side matter the horsepower:eek:
    mgtstumpy and dana barlow like this.
  4. My experience tells me stock Model A's are damn near indestructible. As a 13 year old kid I put my first RPU through hell and I couldn't destroy the running gear.
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  5. F-ONE
    Joined: Mar 27, 2008
    Posts: 1,907

    from Alabama

    It depends on the push truck.

    Usually the push truck will brake first because if the Model A brakes first...... there will be some crunched sheet metal.
    Last edited: Oct 4, 2019
  6. The Shift Wizard
    Joined: Jan 10, 2017
    Posts: 1,658

    The Shift Wizard

    The chassis rails are most often boxed and cross braces added...... for SBC engines as an example. Just keep adding metal until nothing breaks.
  7. The rear axle keys :D
  8. flamedabone
    Joined: Aug 3, 2001
    Posts: 4,575


    The only way to truly know is when you are standing on the starting line picking up parts. You never know the edge until you go over it.

    Jet96, mgtstumpy, Hotrodmyk and 3 others like this.
  9. Budget36
    Joined: Nov 29, 2014
    Posts: 2,701


    "Race him Johnny, race him"
  10. thirtytwo
    Joined: Dec 19, 2003
    Posts: 2,591


    Are you talking about present day sticky drag strip? And are you dumping the clutch?
  11. Yeah, there's so many variables. I'd be thinking they rear axle keys or spider gears.
    clem likes this.
  12. flatford39
    Joined: Dec 3, 2006
    Posts: 2,389


    The axle keys are the weakest link
    clem and gimpyshotrods like this.
  13. 1930 turbo
    Joined: Sep 9, 2006
    Posts: 11

    1930 turbo
    from pa.

    My dad drove stock Model A Fords for over 60 years. He drove them hard, and put on alot of miles. By far the weakest link in the drivetrain was the poured main bearings. The rod bearings were 2nd.
  14. Colonial Coupe
    Joined: Dec 22, 2010
    Posts: 66

    Colonial Coupe

    The cheap reproduction parts will break first. I'm told 4000 rpm tops for dipper rods, school me if that's incorrect. They're darn near indestructible if you keep grease and oil in them. Like said above dumping the clutch can be hard on axle keys.
  15. klawockvet
    Joined: May 1, 2012
    Posts: 340


    Back in my mid teens I bought a neighbors model A for $50.00 to beat around in the hills. My friends and I were pretty hard on it and never did break anything. They are a remarkably strong and forgiving car under normal circumstances.
    clem likes this.
  16. raven
    Joined: Aug 19, 2002
    Posts: 4,411


    Rear axles, that’s what I broke first.

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  17. Fuse
    Sent from my Mi A1 using The H.A.M.B. mobile app
    Jet96 likes this.
  18. Back in the 40's and 50's a lot of guys were using Ford rear ends in their circle track cars. They ran saftey hubs but were breaking axles at the base of the keyway.
    We experimented on a stock model A first and lapped the axle to the hub to get 100% bearing surface.
    Cleaned the surfaces off with acetone and assembled it dry at 150 ft lb
    with a heat treated high nut and NO KEY. We drove that car like it was stolen and never had the tapers slip so we tried it on the race car with a key. We broke axles once in awhile but never had a taper slip or a keyway mushroom out.

    More on:

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  19. Squablow
    Joined: Apr 26, 2005
    Posts: 14,053


    The non-synchro transmission will take a beating if you try to powershift it like a newer car.
  20. Stan Back
    Joined: Mar 9, 2007
    Posts: 509

    Stan Back
    from California

    Won "X Eliminator" at Colton with my stock pickup. Didn't break anything. Beat a Willys station wagon for X Stock, then a GoKart for X Eliminator (he broke his chain). Big deal for a 17 year old.
  21. brjnelson
    Joined: Oct 13, 2002
    Posts: 430


    traction brakes parts
  22. shooter54
    Joined: Apr 25, 2006
    Posts: 5,142


    Definitely rear axle shafts/keys. Not enough power to break much of anything else.

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