Universal aluminum brake master cylinder
- Thread starter dart67
- Start date
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What is the stock bore size?
Any amount larger or smaller will change the pedal feel and travel
If you have power brakes you probably will not noticed the difference.
If manual you will have to apply a little more leg pressure if the stock is 1" and less travel.
1-1/32 is like 4% more pressure.
If you go smaller like 7/8" or whatever the size is you will have less leg pressure but more travel.
BTW force10brakes makes a Chrysler aluminum master
1962-74 Mopar Bendix Style ALUMINUM Master Cylinder
Any amount larger or smaller will change the pedal feel and travel
If you have power brakes you probably will not noticed the difference.
If manual you will have to apply a little more leg pressure if the stock is 1" and less travel.
1-1/32 is like 4% more pressure.
If you go smaller like 7/8" or whatever the size is you will have less leg pressure but more travel.
BTW force10brakes makes a Chrysler aluminum master
1962-74 Mopar Bendix Style ALUMINUM Master Cylinder
Professor Fate
Push the button, Max...
A link to the master that you're referring to would be immensely helpful.
"Universal" usually means something that won't work on just about everything...
What's wrong with getting an actual Mopar-specific master, that fits and works as they were designed to?
"Universal" usually means something that won't work on just about everything...
What's wrong with getting an actual Mopar-specific master, that fits and works as they were designed to?
junkyardhero
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those sound incredibly big for a street car. 1" and 15/16" are about as big as i like to run on street cars. the one you're looking at might likely be for a disc/disc setup, so check to be sure.
I got an aluminum MC from Dr Diff for my 72 Challenger with manual brakes front disc/rear drum. Replaced the stock looking MC. Pedal height is higher, but much improved braking.
Mopar Aluminum Master Cylinder Kit
If you get one from him, be sure to get an adjustable MC push rod too. I got one from Summit for less than Dr Diff sells one for. Worked fine.
Right Stuff Detailing RC14 Right Stuff Detailing Brake Push Rods | Summit Racing
You can get them machined/sleeved back to oem specs, then Dot 5 fluid from here on out. Problem free.
Any idea where rebuild.kits could be had?
Any idea where rebuild.kits could be had?
You certainly can, but if you use the 2 bolt adapter plate that comes with it the original pushrod will be too short to give full pedal travel.
100% not true.
DoctorDiff's master cylinders work just fine with the factory brake push rod, you do not need an adjustable length push rod. The factory brake push rod, with the DoctorDiff master cylinder and adaptor, results in exactly the same brake pedal height as with a factory master cylinder.
I have been running DoctorDiff's 15/16" master cylinder with a factory manual brake push rod on my Duster for over a decade now, I run one on my Challenger as well. Both cars were swapped from factory master cylinders directly to the DoctorDiff aluminum master cylinder with adaptor and both use a factory brake push rod, no change in pedal height.
Interesting. I was not able to get full braking with the stock rod. It was only after using the adj rod that things worked.
Did you have manual or power brakes? There are different brake push rods for manual and power, you can’t mix a power brake push rod with a manual brake a set up.
Depends. I prefer the 15/16” for manual brakes, it gives a higher line pressure (more clamp force at the caliper) but it also means a slightly longer travel on the brake pedal. The 1 1/32” will be a higher/harder pedal, but less brake force.
I like the 15/16” because it the longer travel also makes brake modulation easier. But it does mean a longer pedal travel.
Have manual brakes. When I got the car the front disc brakes were not original so not sure what was correct or not with the MC. In my case to make the new alum MC work properly I had to use the adj pushrod.
Probably because you had the wrong pushrod to begin with. The DoctorDiff master cylinder doesn't require the adjustable push rod, as I said I run mine with a factory manual brake push rod and it works great, no change in pedal height from original.
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