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Technical Banger help! counter weights/flywheels

Discussion in 'Traditional Hot Rods' started by 31jalopy, Aug 17, 2020.

  1. 31jalopy
    Joined: Dec 27, 2015
    Posts: 16


    Hi guys, been doing some research on model A banger builds. they say counter weights stop vibration but does it add hp? higher rpm? have heard whispers of making an A crank look like a T crank?
    Another big question, lightened flywheel adds quicker rpm but will this make higher rpm? does counter weights to crank defeat loss of weight removed from flywheel? yes im after hp and it cost dollars but im new to this. thanks
  2. King ford
    Joined: Mar 18, 2013
    Posts: 1,414

    King ford
    from 08302

    Weellll, counterweights do not add horsepower, will only allow higher RPM in that the motor is less prone to shake itself to death and lighting the rotating assembly allows the engine to rev quicker, not more....if you want more power, more compression, more fuel/air mixture , easier exhaust exit and more spark advance all = more power!!
  3. Model A Gomez
    Joined: Aug 26, 2006
    Posts: 1,379

    Model A Gomez

    I have two Model A's with counter balanced engines and lightened flywheels, they definitely run smoother. The lighter flywheel allows it to rev a little faster and takes weight off the rear main bearing. I had a B motor with a Winfield head, Mallory distributor, Ansen manifold and Holley 94 and a header, ran good but still not a high revving car and was happy running down the road around 55 mph. You are winding a Model A motor fairly tight at 3000 rpm if you plan on it lasting . Fun to mess with but not really a good road car without an overdrive.
  4. ydopen
    Joined: Mar 14, 2010
    Posts: 202


    A balanced crank also saves wear on the center main. All in all worth it if rebuilding engine.


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