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Technical Braking physics

Discussion in 'The Hokey Ass Message Board' started by David Gersic, Jul 1, 2022.

  1. Kerrynzl
    Joined: Jun 20, 2010
    Posts: 3,558

    Kerrynzl
    Member

    There are no winners with internet arguments........But there can be losers in real life situations [if things turn to shit]
    It is like somebody waving colored crystals claiming it will cure cancer [laughable as it may be, these people will try to blame those for exposing them, and those that were fooled by them will come to their defense]

    I'll leave you with this piece of wisdom.......
    Speed doesn't kill, It is the sudden lack of speed that does!!!
     
    Last edited: Jul 10, 2022
  2. Rand Man
    Joined: Aug 23, 2004
    Posts: 5,293

    Rand Man
    Member

    All I know is; the drums on my coupe are early Ford hydraulic and work great, not the slightest complaint. I drive as hard as most anybody would. Never an issue. They were made for a larger, heavier vehicle. Works great on a light A, T, 32, etc.
     
    ekimneirbo likes this.
  3. KenC
    Joined: Sep 14, 2006
    Posts: 1,126

    KenC
    Member

    The red is true. The Mopar brakes of the 50s/early 60 were excellent in that regard. Unfortunately they require frequent adjustments to maintain optimum performance. And the adjustment requires some skill. They, along with most early power brakes, tended to be over-boosted so lost some of the feel.
     
  4. Ziggster
    Joined: Aug 27, 2018
    Posts: 2,289

    Ziggster
    Member

    Yep. The power brakes on my grandmother’s 64 Chrysler Saratoga were super sensitive. I would literally just roll over my big toe. Had a few hair raising experiences. One, the car slid into the next lane sideways once while braking at a red light. Luckily no one was beside us. One day, she let the brother of one of cousins drive it (my cousin and I were the only ones allowed to drive it). His brother got to the first stop sign, hit the brakes, and my grandmother literally flew up and out of the rear seat. That was it for him right then and there and he never drove that car again. Lol!
     
  5. NoelC
    Joined: Mar 21, 2018
    Posts: 667

    NoelC
    Member

  6. ekimneirbo
    Joined: Apr 29, 2017
    Posts: 5,148

    ekimneirbo
    Member
    from Brooks Ky

    Cute answer, but the problem isn't what you are presenting but how you are going about it. " Internet DISCUSSION" doesn't have to be an "Internet ARGUMENT". As for the comment that "those that were fooled by them will come to their defense"............Actually I was trying to sort thru the info and see what made sense and what didn't and had not reached the point of being fooled yet....
    I actually learned a few things.......or at least refreshed my memory on some of it.

    Here is a confusing statement you made. You may be right, but I'm attaching an exerpt from a tech book on brake systems. It says that the primary piston moves forward and hydraulically pushes the secondary piston forward with no mechanical contact. It must overcome the primary and secondary must overcome the spring pressure of the secondary piston. Since they are hydraulically connected, the fluid will also apply that amount of pressure to the front brakes
    It further states that "when the clearances in the brakes are taken up, the pistons will stop moving". So there has to be "some" pressure initially to move the brake pads out and take up the clearance. Remember, the rear drum brakes also have a spring resisting the shoes movement. It would appear that a blanket statement implying that there is no pressure in the system might not be technically correct.
    Hyd Brakes bb1 001.jpg
     

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