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  •  » 65 FB Brake Pedal issues

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    8/11/2020 7:08 PM  #1

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    65 FB Brake Pedal issues

    65' FB 289 4bbl auto
    Reman 70' Disc brakes on front , rebuilt stock drums on back
    Reman 70' Booster, master, and proportioning valve
    MS pedal reposition kit .Everything replaced from the booster to rear brake hdw kits

    three or four quarts of brake fluid, pedal pump brake bleed, vacuum brake bleed, gravity brake bleed.
    Pedal is good and firm when not running. Start the car pedal drops 3 to 4 inches, stops about 1" from the floor with fair brake response.

    Someone help please

     

    8/12/2020 12:27 AM  #2

    Mach173
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    From: Sweden
    Registered: 8/08/2018
    Posts: 186

    Re: 65 FB Brake Pedal issues

    Hi
    Have you benchbleed the booster ? 

     

    8/12/2020 5:38 AM  #3

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    Re: 65 FB Brake Pedal issues

    Bench Bleed a booster?
    Thats a new one on me. Please explain..

       •Thread Starter
     

    8/12/2020 7:33 AM  #4

    Rudi
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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 3,976

    Re: 65 FB Brake Pedal issues

    Probably meant master cylinder.

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    8/12/2020 9:29 AM  #5

    Mach173
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    From: Sweden
    Registered: 8/08/2018
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    Re: 65 FB Brake Pedal issues

    Rudi wrote:

    Probably meant master cylinder.

    Correct Master Cylinder it is :-)

     

    8/12/2020 10:28 AM  #6

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    Re: 65 FB Brake Pedal issues

    Thought there was some sort of trickery i was going to learn.
    But yes all of the normal, common brain farts have been checked and re checked.
    Im thinking (after some advice) brake pedal adjust rod may be the culprit. I will soon find out. 

       •Thread Starter
     

    8/12/2020 11:02 AM  #7

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,336

    Re: 65 FB Brake Pedal issues

    What model vehicle is booster and master cylinder originally for?
    What is the master cylinder bore diameter?
    Was the master cylinder for power or manual application?

    Worst case scenario, just send me your FB!

    Since you have” too many projects”. 😁

    Last edited by Nos681 (8/12/2020 11:04 AM)

     

    8/12/2020 11:16 AM  #8

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
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    Re: 65 FB Brake Pedal issues

    LOL
    Booster, master, and valve are new reman for 70' mustang w/ disc
    Bore size i'm assuming is 1"

    Funny you say just send it to ya. I told my neighbor he could have a running driving FB, the problem is you cant stop....
    FYI:  Car was orginal KH disc brake car. At some point it was converted to granda brakes. 
    I have done the MS pedal repostion and replaced the stock small booster and master cyclinder with the 70' mustang setup. now im here with issues. 

    Last edited by Too many projects (8/12/2020 11:20 AM)

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    8/12/2020 11:24 AM  #9

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
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    Re: 65 FB Brake Pedal issues

    Project list:

    71 C10 LS swapped 
    71 Jimmy in pieces 
    69 Firebird 60% restored
    37 International D2 pickled for the future
    67 Triumph Bonneville bobber
    68 Triumph Bonneville 
    65 Triumph Tiger chopper
    58 Sears allstate 175
    you want the yard art list? 

       •Thread Starter
     

    8/12/2020 11:40 AM  #10

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
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    Re: 65 FB Brake Pedal issues

    Downshift, neutral, and parking brake.😁

    I have the foxbody booster that came with the MS pedal assembly with a 2001 v6 Mustang master cylinder.

    I have used this combo with Granada brakes/proportioning valve/stock rear drums and no issues.

    My car originally had 4 wheel power drum brakes.
    So I didn’t notice a height change in pedal.

    I did notice improved stopping power...and a little bit more sensitive compared to original setup.

     

    8/12/2020 11:45 AM  #11

    Nos681
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    From: Atlantic Mine, Michigan
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    Re: 65 FB Brake Pedal issues

    Do you have picture of front brake setup?

     

    8/12/2020 11:47 AM  #12

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    Re: 65 FB Brake Pedal issues

    ill take some today and post later.
    Thanks

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    8/12/2020 4:15 PM  #13

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,267

    Re: 65 FB Brake Pedal issues

    How did you use a 70 booster on a 65. My kit is not designed for that. 

    Did you adjust the rear brakes as tight as they can be?   You either have air in the system, calipers on wrong side, or rear brakes not adjusted, OR something terribly amiss with that 70 booster installation.   Do you have the 70 power brake pedal or one from a manual brake 70?   Need pics of that installation.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    8/12/2020 4:16 PM  #14

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
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    Re: 65 FB Brake Pedal issues

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    8/12/2020 7:28 PM  #15

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
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    Re: 65 FB Brake Pedal issues

    paste image search

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    8/12/2020 7:41 PM  #16

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    Re: 65 FB Brake Pedal issues

    Well i have a conundrum!
    After zooming on the tag on the booster, it is a A-1 reman 504005 which fits 82' to 86' V6 mustangs 

       •Thread Starter
     

    8/12/2020 7:48 PM  #17

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    Re: 65 FB Brake Pedal issues

    So the information i provided is wrong. I guess i received the wrong booster and master when i order from the local parts house.
    Now that ive discovered this, ill assume this is my issue.

       •Thread Starter
     

    8/12/2020 8:26 PM  #18

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,267

    Re: 65 FB Brake Pedal issues

    If the booster is from 82-86, it should have the same fitment as the foxbody booster used in my kit.  I cannot see the relocated pedal pin on my phone’s screen.  It should be a little less than 1” center-to-center Lower than the old pin.
    Be sure the booster output shaft is adjusted out so it almost touches the MC piston. 0.010” is about right amount of clearance.  Be sure your decimal is in the right place. 

    If your pic of the caliper bleeder is taken with UP facing up on your camera, bleeder points rearward, then it is correct. 

    Leads me to rear brakes. If they are not adjusted out close to the drums, you will have excessive travel.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    8/13/2020 5:45 AM  #19

    Dkralc
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    Registered: 12/26/2015
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    Re: 65 FB Brake Pedal issues

    You may want to add a 10 pound residual pressure valve to the rear brake line.  Dennis

    www.quadmat.com  Butyl Sound Deadener & Insulation
     

    8/13/2020 11:10 AM  #20

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    Re: 65 FB Brake Pedal issues

    Dennis,
    What will that do?
    Im not familiar with it

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    8/13/2020 11:17 AM  #21

    Dkralc
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    Re: 65 FB Brake Pedal issues

    It will keep fluid pressure on the rear wheel cylinders so it requires less pedal travel to engage braking.

    Last edited by Dkralc (8/13/2020 2:15 PM)

    www.quadmat.com  Butyl Sound Deadener & Insulation
     

    8/13/2020 4:20 PM  #22

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,267

    Re: 65 FB Brake Pedal issues

    Are the rear brakes adjusted out to the drums?

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    8/13/2020 4:26 PM  #23

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    Re: 65 FB Brake Pedal issues

    Yes sir
    There is a light drag when turning by hand

       •Thread Starter
     

    8/13/2020 4:53 PM  #24

    Too many projects
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    From: Bourg, LA
    Registered: 8/10/2020
    Posts: 21

    Re: 65 FB Brake Pedal issues

    Let me add that the pedal only travels 1 to 2 inches when not running and is setting where it should.
    Only when vacuum (Engine running)is applied to the booster does the pedal travel 4 to 5 inches to about a 1" off the floor.

       •Thread Starter
     

    8/14/2020 9:31 AM  #25

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,267

    Re: 65 FB Brake Pedal issues

    That much travel is definitely Indicative of a problem.  Will the pedal return to static position fully before hitting the rubber stop?  I am wondering if the pedal is not allowing the mc to fully relax.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

     

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