I had a non power GM dual master cylinder on my 32 Ford with front disc brakes without a power booster and the car stopped on a dime. I want to use the same setup on my 1951 Ford but I threw away the papers I had on the 32 when I sold it (dumb). Can some one let me know what the proper part number would be say an NAPA number or whatever to get the same unit. Thanks Mercuryguy
We can guess....there were several GM cars available in the late 60s with manual disc brakes, including the Corvette.
I was going to mention Corvette non power master. They could be had with 4 wheel discs and if I am not mistaken disc drum in the later models.
pretty sure they were all 4 wheel drum through 1964, and four wheel disc 65 and later. power boost was an option, until some time in the 70s?
You are probably correct. I was thinking about the '70 that came in for a color change when Lynn was still alive. For some reason I am thinking that it was disc drum, but I crawled under a lot of old heaps back then. You are always more correct on things like this or at least I depend on you being more correct.
here is a rockauto 67 chevelle non power disc drum master. shows 1 1/8 bore... pretty tough for us to know what you had though..... https://www.rockauto.com/en/moreinfo.php?pk=1318802&cc=1383803&jsn=605&jsn=605
In a good disc brake setup, is the master cylinder bore size related to the Piston size in the caliper? Or is bore size related to volume of fluid master can displace? In drum/drum setup, master bore same as wheel cylinder bore is a good starting point. At any rate, OP choosing the same master he had in a prior rod only makes sense if the rest of the brake system is very similar. This new rod is quite different weight Wise and also front - rear distribution is quite different. My bottom line, why not choose a master that is matched/compatible with other components of current build? Phil
https://www.oreillyauto.com/detail/.../chevrolet/nova?q=brake+master+cylinder&pos=0 1.13 bore 70-74 Nova Or the early round GM style as stated before.. Just depends on what you had before? https://www.oreillyauto.com/detail/...vrolet/chevelle?q=brake+master+cylinder&pos=0
My 51 Vicky with Nova front clip and 9" Ford rear has the Brake pedal still floor mounted runs the 67 Chevelle Master with No booster. Stops on a dime and gives ya change back. I don't know why I used the Chevelle insted of the Nova unit that would have seemed natural for the front unit.
Your 51 is heavier than your 32 so things cold be different. A smaller diameter MC will do a much better job with no power. Longer pedal movement but less foot pressure. My non power set up has 7/8” MC and 15/16 rear cylinders on 11” f-150 brakes. My car is 3500# and stops much better than all drums but not like power.
EBay,4 PORT CORVETTE STYLE GM MASTER CYLINDER DISK/DRUM PROPORTIONING VALVE + LINES. 1 inch bore, manual disc- drum. About $100. That's what I just ordered.
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