Master cylinder for disc brakes

[Vancraft]

Hi everybody,

I am a new member and am working on a 1936 plymouth. Could somebody that has done a front disc brake conversion tell me what master cylinder is best to use? Stock with a proportioning valve or is there a modern two chamber that fits? The car is bone stock. Any help is appreciated. 
 

 

[Adam H P15 D30]

I use the stock one with the internal check valve removed

[Vancraft]

Wow that simple? No need for a proportioning valve? How do your brakes perform? 

[Doug&Deb]

I used the stock master with the residual valve removed but I added two inline residual valves. Two pound for the discs and ten pound for the drum. Because of the position of the master I was concerned about getting air in the system. I’ve had a Scarebird kit on my 52 Coronet for five years now with no issues.

[Sniper]

I don't run any residual pressure valve on my 51 Plymouth with front disc brakes. The reason for that is when I had them in it would keep the brake applied. So I pulled them back out. As for a proportioning valve if your rear brakes lock up before your front brakes then you need one otherwise you do not.

[Adam H P15 D30]

13 hours ago, Vancraft said:

Wow that simple? No need for a proportioning valve? How do your brakes perform? 

Car can sit for months and have a firm pedal, I have found no need for any RP valves.

I do have an 8" Ford rear with more modern drum brakes.

It could use an adjustable valve in the rear circuit, they will lock up first but barely.

[Vancraft]

Thanks for all the replies, really appreciate it. The owner of the car may also be interested in a rear end swap but it needs to be same width as original and be able to mount the stock wheels. He does not want a hot rod, something that just stops better than factory.

[Sniper]

Properly maintained, the stock drums work pretty well.  Well enough that the stock style tires are the limiting issue, not the brakes.

 

The key is properly maintained, those brakes need regular adjustment and that adjustment is semi-involved.

 

This topic has been routinely discussed and there is lot's of info in the search function.

 

Me?  I have front discs and modified the major adjusters in the rear to simplify the adjustments there.