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View Full Version : Finally got my car. Now about those brakes...



Drive Junk
09-23-2017, 05:20 PM
My car has been converted to a dual brake hydraulic system and a different booster, which may be a very good or a very bad thing. Can anyone identify what I have and/or does anyone have any experiences with same, good or bad? It has NOT been converted to disc brakes.18081

RODPARTS
09-24-2017, 12:04 PM
It is not an aftermarket booster and master cylinder. It is a OEM unit of undetermined make to me. Can you take a picture from the other side and maybe with the cap off, please?

Bob Barger
09-28-2017, 02:25 PM
It's a standard Ford master from the early 70s. It is used for disc front drum rear. The larger rear chamber is for the front disc. I see no reason it won't work on drums. The only reason the chamber is larger is to provide more volume to the calipers.

RODPARTS
09-28-2017, 03:27 PM
Drum brake master cylinders usually have a 10 lb. residual valve built into them. A master cylinder from a disc front/drum rear car has the residual valve for the drums built into the combination valve (the brass valve you see on production cars - it is a combination metering and proportioning valve with a low level light switch built in) It may be just the angle of the picture, but your master cylinder looks to have a brake light switch installed off of one of the master cylinder ports? Also make sure your brake line is not close to the exhaust - if it is, the fluid can heat up and boil with a loss of braking ability. Can you take closer pictures of the master cylinder? For disc front/drum rear, we use a 1" bore master cylinder and a 1 1/8" bore for disc/disc applications. A drum/drum setup could use a 7/8" bore master cylinder For more pressure.

Drive Junk
11-26-2017, 10:32 PM
My thoughts precisely regarding proximity of exhaust to brake line. Pedal gets hard and no amount of extra leg exertion increases braking. I have convinced myself that a disc brake conversion is in both my best interest as well as the cars. No reason to immolate a Pinto because I can't stop. Anyone have suggestions or reviews on available change overs? I possess sufficient skills, equipment and tools to install a well sorted "kit". Not afraid to do the work. Good winter project, IMHO.

Bob Barger
12-02-2017, 08:19 AM
My thoughts precisely regarding proximity of exhaust to brake line. Pedal gets hard and no amount of extra leg exertion increases braking. I have convinced myself that a disc brake conversion is in both my best interest as well as the cars. No reason to immolate a Pinto because I can't stop. Anyone have suggestions or reviews on available change overs? I possess sufficient skills, equipment and tools to install a well sorted "kit". Not afraid to do the work. Good winter project, IMHO.

I have installed a couple of kits provided by American Brake and Steering (ABS) they are bolt on and include all the parts for the front brake conversion (except the tubing). You may have to change the wheels because of clearance, check with rodparts and Jay can help with that.

Drive Junk
12-17-2017, 05:06 PM
Drum brake master cylinders usually have a 10 lb. residual valve built into them. A master cylinder from a disc front/drum rear car has the residual valve for the drums built into the combination valve (the brass valve you see on production cars - it is a combination metering and proportioning valve with a low level light switch built in) It may be just the angle of the picture, but your master cylinder looks to have a brake light switch installed off of one of the master cylinder ports? Also make sure your brake line is not close to the exhaust - if it is, the fluid can heat up and boil with a loss of braking ability. Can you take closer pictures of the master cylinder? For disc front/drum rear, we use a 1" bore master cylinder and a 1 1/8" bore for disc/disc applications. A drum/drum setup could use a 7/8" bore master cylinder For more pressure.

Now I have cleared all the paperwork hurdles for mt state and now have the car properly licensed, the next step is to get reliable brakes on it. I see mention of changing wheels for the disc brake conversion which I understand for caliper clearance, but I surely wish to use the OE wheel covers. Can you tell me more regarding a front disc changeover, and based on how my booster/master cylinder is acting a compatible booster/master cylinder unit that will not be as scarce should service be required at a later date. I can give you my email if you wish, as I don't get back to the forum as often as I would like.
Thanks in advance, Paul