• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Manual disk brakes????
#1
My 72 Mach has front disks but they are manual brakes.  I thought all disk brake setups were power from the factory??  Did someone do a disk conversion on my car at some point and leave them as manual??

Thanks!
Wade
1972 Mach 1 351 cj 4speed
"We confide in our strength, without boasting of it; we respect that of others, without fearing it."--Thomas Jefferson

  Reply
#2
I would say so. Don't think standard reservoir will give you enough pressure to clamp a disc brake caliper.

BKDunha
72 Mach 1 H-Code (Concourse driven restoration)
67 S-Code Factory GT with 4-Spd

68 Mercury Cyclone (Pro-Street project)
  Reply
#3
The manual brake master cylinder is I think 1" in dia. and the PDB is 15/16". You get the power from the booster not the cylinder.
I have driven my car all year with a blown booster just takes a little longer to stop. Headed to booster Dewey soon. Neck will not let me do much.
BTW brake pedal is different, proportioning valve, and I think master cylinder is positioned different on the firewall. If they put the calipers on they changed the spindles also. I have several PDB cars if you need to come look or need some parts.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
  Reply
#4
(09-19-2018, 08:36 AM)bkdunha Wrote: I would say so.  Don't think standard reservoir will give you enough pressure to clamp a disc brake caliper.

Manual drum master cylinder will give you enough pressure.  I have same setup on my car. Originally came with manual drum brakes and I swapped out for disc in front and back. Runs both fine. But I do have all the parts to convert it to power.  All newly rebuilt, just gotta get time to put them on.

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]




                                                                                             
  Reply
#5
Everyday is an opportunity to learn. I agree that disc brakes will work without booster as I have also blown booster diaphragms. Just not at all comfortable with the distance needed to stop without booster. Understandably the booster is one component of several specifically to be utilized with PDB setup. I can vouch for Booster Dewey. He has done 3 boosters for me and all worked and looked great after his services.

BKDunha
72 Mach 1 H-Code (Concourse driven restoration)
67 S-Code Factory GT with 4-Spd

68 Mercury Cyclone (Pro-Street project)
  Reply
#6
(09-19-2018, 06:16 AM)scgamecock Wrote: My 72 Mach has front disks but they are manual brakes.  I thought all disk brake setups were power from the factory??  Did someone do a disk conversion on my car at some point and leave them as manual??

My car came with manual front disc brakes and drum brakes in the rear. It now has four wheel manual disc brakes and has absolutely no issues stopping. I have a Wilwood MC and NO proportioning valve.
[+] 1 user Likes Tnfastbk's post
  Reply
#7
runninpony 
+1 on Booster Dewey, that's the way to go!

Old Mustangs never die, they just go faster!
  Reply
#8
So bottom line my car would not have come with manual brakes\no booster if it has front disks?  Is it possible that someone pulled the booster because it went bad and then just stuck a manual master cylinder back on it or is it more likely that they did a front disk brake conversion?

Thanks!
Wade
1972 Mach 1 351 cj 4speed
"We confide in our strength, without boasting of it; we respect that of others, without fearing it."--Thomas Jefferson

  Reply
#9
DO you have a marti report? It will tell you what it came with

'73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

'73 F code convertible. Bright red. Needs total restore. (IE HOT MESS)

- Jason
  Reply
#10
Does the PDB show up on the Buck Tag? Not up to speed on them for sure. I would think it would show there.
D


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  Cobra brakes upgrade Robsweden 15 584 08-31-2018, 07:12 AM
Last Post: Robsweden
  Rear brakes sticking sometimes?? turtle5353 12 486 07-11-2018, 01:30 PM
Last Post: turtle5353
  Power to Manual brakes? CalgaryChris 8 598 03-17-2018, 07:28 AM
Last Post: delawarebill
  Cobra brakes Mjordan 2 510 12-06-2017, 07:29 AM
Last Post: Mjordan
  Anyone have Hydraulic Boosted Brakes? jowens1126 16 1,184 07-27-2017, 04:42 PM
Last Post: protouringstang73
  wilwood from brakes 73' mach 1 5 564 06-26-2017, 07:50 PM
Last Post: Jeff73Mach1
  Left and right calipers disc brakes Robsweden 6 1,102 06-04-2017, 02:16 PM
Last Post: Robsweden
  front brakes eddyw 6 1,025 05-25-2017, 11:35 AM
Last Post: Don C



Users browsing this thread: 1 Guest(s)