FYI FORD - MustangSteve's Ford Mustang Forum
The Internet's Most Knowledgeable Classic Mustang Information
IF YOU HAVE A QUESTION ABOUT CLASSIC FORD MUSTANGS, YOU HAVE COME TO THE RIGHT PLACE!
MustangSteve has over 30 years of Mustang experience, having owned 30 of them and restored several others. With the help of other Mustangers, this site is dedicated to helping anyone wanting to restore or modify their Mustang.... THERE ARE NO DUMB QUESTIONS!!!!!
Visit MustangSteve's web site to view some of my work and find details for:
FYIFORD Contributors' PICTURES - Power Brake Retrofit Kits for 65-66 Stangs - Classic Mustang FAQ's by MustangSteve - How to wire in a Duraspark Ignition - Mustang Ride Height Pictures and Descriptions - Steel Bushings to fit Granada Spindles to Mustang Tie Rods - Visit my EBAY store MustangSteve Performance - How to Install Granada Disc Brakes MustangSteve's Disc Brake Swap Page - FYIFORD Acronyms for guide to all the acronyms used on this page - FYIFORD Important information and upcoming events

You are not logged in. Would you like to login or register?

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » FoMoCo Brake Booster

    • 1 of 1

       

    3/13/2020 3:09 PM  #1

    BMCGC
    Active Member

    Offline

    Registered: 3/07/2020
    Posts: 7

    FoMoCo Brake Booster

    My 67 200/C4 coupe has factory power drum brakes.  It has Im pretty sure the original FoMoCo brake booster.  It needs a rebuild.  I have converted the car to 5 lug drum brakes and at some point will do K/H disc brakes on the front.

    This is not a high value car and I am making it a "keep me busy" in retirement project.  I am installing a 250, EAPS, AC and at some point a T5.

    I do not want to have the brake booster rebuilt, I feel like its a waste of a good booster that could be better used on another car.  Is there a generic booster that I can substitute that will do the job?  When I go to the K/H disc, I will also go manual on the brakes.  My 65 289/C4 coupe has manual disc/drum and I am happy with that setup.

    Can I disconnect the vacuum and bypass the booster until I do the power to manual swap?  I will probably do brakes and EAPS together since I have to pull the seats to make enough room for me to get under the dash to swap the pedal and pull the steering column.

     

    3/13/2020 5:42 PM  #2

    6sally6
    Hyper FYIFORD ADDICT

    Offline

    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,866

    Re: FoMoCo Brake Booster

    I don't know but..........post plenty of pictures of your work!
    You gonna 'cam-up' that 250?!! With a T-5 and no power brakes.....the sky's the limit pardner!
    6sally6

    Glad to have you with us!!

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    3/13/2020 6:24 PM  #3

    BMCGC
    Active Member

    Offline

    Registered: 3/07/2020
    Posts: 7

    Re: FoMoCo Brake Booster

    Schneider cam:
    Grind Number:262-70H
    Intake Duration (gross):262
    Exhaust Duration (gross):270
    Intake Duration (.050”):208
    Exhaust Duration (.050”):214
    Intake Valve Lift*:.435"
    Exhaust Valve Lift*:.442"
    Lobe Separation:110
    Intake Valve Lash:.000"
    Exhaust Valve Lash: .000"
    RPM Range:1800-5500

    Last edited by BMCGC (3/13/2020 6:25 PM)

       •Thread Starter
     

    3/13/2020 6:41 PM  #4

    6sally6
    Hyper FYIFORD ADDICT

    Offline

    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,866

    Re: FoMoCo Brake Booster

    Oh yeah!! ........should have a 'nice-lick' to it..........post build pics!!!!
    6s6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    3/13/2020 8:39 PM  #5

    MS
    Forum Originator

    Offline

    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,279

    Re: FoMoCo Brake Booster

    On a 67-68, you can remove the booster and convert to manual brakes, but you must also change the brake pedal.  The power brake pedal has a 3:1 ratio and the manual brake pedal has 6:1 ratio.

    I have a manual pedal I would sell or swap with you.  In my opinion, the power brakes are very beneficial, though.  I would never consider going backwards by swapping to manual unless it was a pure race vehicle.

    There are generic boosters that can be used.  I’m sure www.mustangsteve.com has one that will bolt right in. 

    I also have a rebuilt, restored midland booster like your original that I was hoarding for my 68 Shelby that I sold.  Another option is to use the Bendix 1969 booster which is more readily available. It requires a stamped spacer plate that is typically not supplied with the booster. Mike at mustangsteve can get those parts for you.

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

    3/13/2020 9:57 PM  #6

    Ron68
    Senior 24-7 FYI Addict

    Online!

    From: Mukilteo, Washington
    Registered: 4/01/2013
    Posts: 1,587

    Re: FoMoCo Brake Booster

    BMCGC wrote:

    My 67 200/C4 coupe has factory power drum brakes.  It has Im pretty sure the original FoMoCo brake booster.  It needs a rebuild.  I have converted the car to 5 lug drum brakes and at some point will do K/H disc brakes on the front.

    This is not a high value car and I am making it a "keep me busy" in retirement project.  I am installing a 250, EAPS, AC and at some point a T5.

    I do not want to have the brake booster rebuilt, I feel like its a waste of a good booster that could be better used on another car.  Is there a generic booster that I can substitute that will do the job?  When I go to the K/H disc, I will also go manual on the brakes.  My 65 289/C4 coupe has manual disc/drum and I am happy with that setup.

    Can I disconnect the vacuum and bypass the booster until I do the power to manual swap?  I will probably do brakes and EAPS together since I have to pull the seats to make enough room for me to get under the dash to swap the pedal and pull the steering column.

    I hope you have planned this swap out very carefully. I took a 200 out of my 68 and installed a 250. It was a nightmare to get accomplished. The 250 I swapped in was out of a 1979 Monarch. I also used the C4 out of the 79. I had quite a time finding engine mounts and the rubber isolators that went on the mounts that would fit a 68. Also, I had to put in an electric fan in front of the radiator because the engine sat so much farther forward than the 200, the water pump was very close to the radiator.  What carburetor setup and linkage will you use? I finally got it all working, drove it 600 miles and spun a rod bearing. Pulled it out and installed a 351W and it was a breeze to install. Maybe you've got some tricks up your sleeve that I didn't - but it was my first attempt and quite a learning experience - anyway - good luck.
     

    68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     

    3/14/2020 6:09 AM  #7

    TKOPerformance
    Hyper FYIFORD ADDICT

    Offline

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,511

    Re: FoMoCo Brake Booster

    Just removing the vacuum from the booster will yield brakes that are almost impossible to use.  As MS noted, the pedal ratios are different.  The power brake pedal is meant to be used with power assist.  I also have a manual brake pedal for the car I have stored because its an original part, though the possibility of that pedal ever going back in the car is about a million to one.  I too would advise sticking with power brakes. 

    Everyone has to make up their own minds regrading engine swaps.  Personally, to go through that much hassle to swap from one six to another seems not worth it.  You're already planning to swap the trans.  Personally I'd just go V8 and be done with it. 

     

    3/18/2020 5:24 PM  #8

    MS
    Forum Originator

    Offline

    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,279

    Re: FoMoCo Brake Booster

    Is this the same post that is circulating on VMF?  If so, I picked up on your comment that brake bleeders are pointing UP.
    If you have 68-73 style single piston disc brakes, the bleeders must point to the REAR, intersecting the caliper piston at the top of the caliper. 
    The post on VMF said the pressure only got to 300 psi st the calipers. That number would be consistent with air trapped in the calipers which could be caused by calipers being on the wrong side of the car.

    I do not make replies on VMF. We already have a good forum right here for this type of stuff.  I only heard about it through another source.

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

    3/22/2020 10:54 PM  #9

    Nos681
    Senior 24-7 FYI Addict

    Offline

    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,337

    Re: FoMoCo Brake Booster

    Here’s a great reference with pictures about the calipers.

    https://www.mustangsteve.com/granadadiscs.html

     

    4/10/2020 8:08 PM  #10

    BMCGC
    Active Member

    Offline

    Registered: 3/07/2020
    Posts: 7

    Re: FoMoCo Brake Booster

    Thats not my thread on VMF.  I converted my 4 lug drum to 5 lug drum.  Everything on the drum brakes is new except the backing plates and front drums.  I also had new bearings pressed on the 8" rear end that I installed at the same time.

    I am hoping to find a booster that will be a direct replacement for my Midland booster.  I would prefer not to have to replumb the master or make any other modifications.  The brakes work perfect with the exception of the very loud whoosh I get when pushing the pedal.

    Im pulling the engine and wiring harness this weekend.  I would like to pull the booster as well since I have it all apart and I can step into the bay.  Ive also go to replace the hoses for the windshield washer.  The booster, harness plug and washer hoses all occupy the same turf on the firewall.

       •Thread Starter
     

    4/10/2020 8:33 PM  #11

    BMCGC
    Active Member

    Offline

    Registered: 3/07/2020
    Posts: 7

    Re: FoMoCo Brake Booster

    Ron68, I have the correct 69/70 Mustang engine mounts with the rubber isolators.  67 Dart isolators can also be used with slight modification.  I think I will have room for my mechanical fan, I have a 2 core radiator and the 200 has a 1.5" fan spacer.  The WP and balancer are about a 1" longer on the 250, so replacing the 1.5" spacer with a 1/2" spacer should keep me right where I was at with the 200.  Ive got a spare block and head and am going to mock it up the next few days.  Ive got a really nice 65 with a 289.  I wanted to do something different and have something to tinker on.  I almost bought a 3.0 BMW engine for it, but the tranny is huge, I would have to cut the tunnel and remove the shock towers to make it fit + figure out the wiring and converting everything to electronic.  to big a project for me.

       •Thread Starter
     

    4/10/2020 9:35 PM  #12

    MS
    Forum Originator

    Offline

    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,279

    Re: FoMoCo Brake Booster

    Correct Midland booster for sale on Swap Meet forum

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

     

    1 of 1

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  »  FoMoCo Brake Booster

    • Board footera


    REMEMBER!!! When posting a question about your Mustang or other Ford on this forum, BE SURE to tell us what it is, what year, engine, etc so we have enough information to go on.