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HARD BRAKES

Discussion in 'Off Topic Hot Rods & Customs' started by Sandra K strouse, Jul 23, 2024.

  1. Sandra K strouse
    Joined: Mar 23, 2024
    Posts: 1

    Sandra K strouse

    HEY GUYS I BOUGHT A C CAB, AND IT IS HARD TO STOP FAST, I PUSH IN ON THE BRAKE AND I HAVE TO USE ALL MY MIGHT TO GET THE CAR TO STOP.
    EXAMPLE I WAS DRIVING ONE DAY AND A CAR PULLED RIGHT IN FRONT OF ME AND STOPPED I PUSHED IN THE BRAKE AND I BARELY AVOIDED REAR ENDING HER. IS THERE ANYTHING I CAN DO TO FIX THIS TO BE ABLE TO STOP IF THERE IS A ISSUE???
     
  2. JohnLewis
    Joined: Feb 19, 2023
    Posts: 661

    JohnLewis
    ALLIANCE MEMBER

    Does it have a brake booster?
     
  3. Wanderlust
    Joined: Oct 27, 2019
    Posts: 1,093

    Wanderlust

    Changing the pedal ratio will help if you’ve no brake booster
     
  4. Tow Truck Tom
    Joined: Jul 3, 2018
    Posts: 3,510

    Tow Truck Tom
    ALLIANCE MEMBER
    from Clayton DE

    Why the yelling?
    Harder for me to read also.
    More description or photo of set up, maybe
    Ooh yeah,, Nice Truck.
    :D
     
  5. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,086

    Mr48chev
    ALLIANCE MEMBER

    There are several factors that could contribute to that.
    AS Wanderlust said, Pedal ratio is one, Pedal ratio = the amount of leverage you are able to use and T buckets normally have pretty short pedal arms.
    The composition of the brake lining/pads can contribute to it. Certain brake lining material require more pressure to stop.
    The size of the piston in the master cylinder compared to the size/volume of the calipers or wheel cylinders are often an issue if the builder gets it wrong.

    The car looks pretty standard issue T bucket kit ch***is wise. Meaning that there are a lot of T buckets floating around with very similar ch***is under them. There may be some upgrades brake wise that can make things a lot better stopping wise.
     
    rockable and Tow Truck Tom like this.
  6. How much brake pedal travel do you have? If the pedal gets hard within a couple inches of travel (and you have room/clearance for more travel) the problem might be too large of a bore in the Master Cylinder, which diminishes the amount of pressure you are producing. A smaller bore with more travel (to still provide the needed volume to the wheel cylinders) might be the answer.
    You may also have hard pads/shoes, which some people use to get longer life, but they lack the friction during normal driving to meet everyday needs.
    Good luck
     
    Tow Truck Tom likes this.
  7. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,569

    gimpyshotrods
    ALLIANCE MEMBER

    Post a picture of the front calipers, the brake pedal, and the master cylinder.

    We're going to need to see what parts are in this.

    Look at all of the rigid brake plumbing and make sure that nothing has been pinched.

    Look at all of the flexible brake hoses and make sure that none appear swollen, cracked, or otherwise damaged.

    Jack up one wheel at a time. Have a helper spin it. When it is spinning, stomp on the brake pedal.

    Let us know what happens.

    Aside from the Ackerman issue, the car is neat!
     
    Tow Truck Tom and Pocket Nick like this.
  8. Happydaze
    Joined: Aug 21, 2009
    Posts: 2,406

    Happydaze
    ALLIANCE MEMBER

    Most likely master diameter and / or pedal ratio. What are those numbers?

    Chris
     
    jimmy six likes this.
  9. mohr hp
    Joined: Nov 18, 2009
    Posts: 1,634

    mohr hp
    Member
    from Georgia

    Don't drive it until you fix it!
     
    Tow Truck Tom, Deuces and bobss396 like this.
  10. RmK57
    Joined: Dec 31, 2008
    Posts: 3,184

    RmK57
    Member

    Could be some obstruction in one of the rubber hoses. I’ve had that happen where the rear brake hose was deteriorated / collapsing and wouldn’t stop the car as it should have.
     
    tractorguy likes this.
  11. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member

  12. jimmy six
    Joined: Mar 21, 2006
    Posts: 17,240

    jimmy six
    ALLIANCE MEMBER

    No booster…7/8” MC….6 to 1 pedal ratio….= good brakes
     

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