Master Cylinder

Early Mustang dual, (I think the 65-6 may have been singles) so around 68-70... This is just a memory of some one elses deal... Karl
 
rags999 said:
Is there a duel master cylinder that would work with the standard brakes on my 50 Ford pickup?
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Mid to late 60's GM for drum/drum. It has the residual valves built in.
I had this setup on my '51 Merc. which has the same size brakes as the '50 Ford pickup. The cover may be different than the one shown.


mstr.jpg
 
Use something like the Napaonline site to find a dual M/C that has the same piston diamter as the stock unit. I am running a '68-'70 Chevy/GMC C20 unit in mine.
 
Changing to a dual master cylinder seems like a fairly easy thing to do on our trucks but the one problem I see arise from doing this is accessibility to fill the master cylinder. The stock unit is a pain to get to, having to worry about something falling into it while removing the cap, checking the level and filling. The updated master cylinder will have a larger cover which will be more difficult to access through the round hole. I'm currently working a '37 Buick and am installing a dual reservoir master cylinder but on the Buick it is a lot more difficult because of the construction of the frame. I am going with a remote fill system with remote reservoirs mounted on the firewall. Just a thought for you guys to consider.
 
I'm building a 51 Ford pickup....I'm using a 1982 Ford F350 disc drum 1.062" master cylinder. How do you tell which port on the master cylinder is for the front disc and which is for the read drums? Can it be determined by the port thread size? ANY HELP
 
everyone always seems to concerned about being able to access to new m/c but really how often do you even think about it? unless it fails it's normally forgotten. drilling a small hole in the floorboard that a 1/4" tube can fit through is all you really need to fill m/c with.
 
terhotrod said:
I'm building a 51 Ford pickup....I'm using a 1982 Ford F350 disc drum 1.062" master cylinder. How do you tell which port on the master cylinder is for the front disc and which is for the read drums? Can it be determined by the port thread size? ANY HELP
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On all-metal disc/drum masters with full size caps, the larger (obvious) chamber always goes to the fronts.
 
terhotrod said:
I'm building a 51 Ford pickup....I'm using a 1982 Ford F350 disc drum 1.062" master cylinder. How do you tell which port on the master cylinder is for the front disc and which is for the read drums? Can it be determined by the port thread size? ANY HELP
Click to expand...

The larger reservoir is for the front. Are you running 4 wheel drums or disc/drums?

I'm assuming that the master you have is a disc/drum master. Yes? If so and you are going to run disc/drums, you will need two residual pressure valves (10 lbs for the drums, 2 lbs for the discs, plus a proportioning valve.

If you are running all drums, then you will need two 10 lb residual pressure valves, probably not a proportioning valve (again assuming a disc/drum master.)
 
To fill on my 39 pu with a duel set up I just made a 3" hole in the floor board and cap it with a large rubber seal to fill the hole . All you need to do to inspect and fill if needed is pull up the floor matt.
 
paul2748 said:
The larger reservoir is for the front. Are you running 4 wheel drums or disc/drums?

I'm assuming that the master you have is a disc/drum master. Yes? If so and you are going to run disc/drums, you will need two residual pressure valves (10 lbs for the drums, 2 lbs for the discs, plus a proportioning valve.

If you are running all drums, then you will need two 10 lb residual pressure valves, probably not a proportioning valve (again assuming a disc/drum master.)
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Yes, I'm running disc and drums. Forgot to mention that I'm running firewall mount also, so probably won't need the residual valves. Isn't that more for master cylinders that are low and possibly under the caliper level? Or should I run residuals anyway? I've always thought that the large chamber on the master cylinder was for the disc brakes, but was recently told by someone that I was mistaken. Needed to confirm....Thanks
 
terhotrod said:
Yes, I'm running disc and drums. Forgot to mention that I'm running firewall mount also, so probably won't need the residual valves. Isn't that more for master cylinders that are low and possibly under the caliper level? Or should I run residuals anyway? I've always thought that the large chamber on the master cylinder was for the disc brakes, but was recently told by someone that I was mistaken. Needed to confirm....Thanks
Click to expand...

You won't need, or want, a residual to the front discs with the firewall mounted master cylinder, but the rear drums should have one, either internal in the master or a 10 lb inline external.
Whoever that someone is who "told" you is wrong-the larger chamber ALWAYS goes to the fronts, drum or disc.
 
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