1975 Imperial master cylinder

[olsn500]

I picked up a complete 75 imperial rear end off of a local demo guy. He called me as he knows about my quest for rear disk on my Newport. Not realizing that I would need the master cylinder to make the rear disc work like factory. I was thinking of using a disk brake proportioning valve, or an adjustable stock car proportioning valve.
I'm also looking at this and are the calipers, pads, and rotors all just front end parts?

 

[commando1]

You'll need a 50/50 reservoir master cylinder on cars with front and rear disc brakes.
Using a proportioning valve on a std. disc brake master cylinder is making it worse.
The reservoir for the rear on a std disc brake master clinder is already too small. A proportioning valve will be useless or worse.

If you use then decide to use a proportioning valve to limit the front brakes, you are severely reducing braking power overall.

I'm also looking at this and are the calipers, pads, and rotors all just front end parts?

The rears are totally different and parts are unobtainable.

 

[olsn500]

Is the master cylinder issue that there is not enough fluid in the non 50/50 master cylinder to run the system? How do these master cylinders split the braking without a proportioning valve? I imagine it's internal to the master cylinder to some extent. I was under the impression that you wanted breaking to be like 70% front and 30% in the rear. When you say 50/50 you just mean the how the fluid in the master cylinder is divided right? Not a 50% split on the breaking.

 

[commando1]

When you say 50/50 you just mean the how the fluid in the master cylinder is divided right?

That is correct. The capacity of each of the two resevoirs of the master cylinder.

Disc front/Drum rear:

Disc F&R:

 

[cantflip]

That is correct. The capacity of each of the two resevoirs of the master cylinder.

Disc front/Drum rear:

View attachment 130057

Disc F&R:

View attachment 130058

Where did you find that exploded view??

 

[commando1]

Where did you find that exploded view??

Stop it. You know where. Sounds like frugal.