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Dual chamber master cylinder for "50 Buick????


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Does anyone know of a way to do this when the master cylinder is mounted on the frame rail or of anyone who has done it somehow? It seems unlikely but then I wouldn't have thought tube shocks could be put on the front of a '53 until I read it in the April issue of the Buick Bugle.

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Hi,

It's not easy, but certainly can be done. I installed a dual master cylinder on my disassembled 1937 Cord. It required making a clone of the MC bracket. The safety issues made it a no-brainer decision, and the fact that the car is disassembled made it a practical choice. I got the master cylinder from Jegs.com after talking with their technical adivsors. Pictures of this installation are at:

https://onedrive.live.com/redir?resid=20ACF37336860DAB!118&authkey=!AOPRBiQVHvN-DAU&ithint=folder%2c.jpg

There is also an extensive thread on this subject at:

http://forums.aaca.org/f165/1936-special-master-cylinder-blasphemy-good-364695.html

--Tom

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Thanks for the pictures, Tom, and the reference to the thread. My '50 is disassembled also so I can easily get to the frame rail too. When you say you made a clone of the mc bracket, I take it you carefully drew up a template with the old mc in place and then had a shop make the new bracket. It sounds like you're not to the point in the restoration to be driving the Cord for a while but have you made the switch to a dual mc in your '37 Buick like your post last December suggested and, if so, how's it working? I'll be checking with Jeg's to see what they can do for me.

Alan

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Hi,

I suspect that the Cord may not be running for a long time, although I would like a chance to drive it some day. I converted it to a dual MC because it made sense and was now-or-never with the car disassembled. The Cord will be fitted with two remote brake fluid reservoirs to make filling easier. The master cylinder bracket was a bizarre thing--it had three non-square angles to it in order to conform to the the tapered frame. My fabricator made it for me using the original forging as an exemplar.

I have not converted the 37 Buick to a dual MC. The link I sent to the forum relates a member's conversion of his car to a dual. He used the same master cylinder (he trimmed off one wing of the casting) that I bought from Jegs, got a Jegs live-end link, and managed to fit it all together in a very cramped space. (The Cord's space was cramped also--I had less than 1/4" to spare.)

When I have the Cord running I'll post info on the ACD Club forum about how the brakes work out.

http://forums.acdclub.org/phpbb2/viewtopic.php?t=6415

--Tom

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  • 2 months later...

I asked about this and got know where

I built a 32 ford street rod and had some spare masters and brackets.

Just started fitting this and I think It should work. I will remove current (51 Biuck Roadmaster) master cylinder and take this 32 bracket, trim and weld over and around

stock bracket, so could be removed if wanted.

Using a ford dual master 1 inch bore. Need a little more details from a brake specialist. Must consider wheel cylinder diameter and add risidual valves. Also a heat shield

Will do this Fall or winter

I will provide hpotos and part #

any questions Gardner.se@pg.com

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Check out this simple mount from Scarebird, they also have a disk conversion bracket and bearing for the front https://scarebird.com/index.php?route=product/product&path=59&product_id=123

I did this on my 52 special. I made my own bracket and used the stock mounting bolt holes in the frame. Then mounted the reservoirs on the fuse panel access cover. Factory pedal and linkage system to the new pushrod. The pedal seems to have a lot of travel before it gets firm but will stop the car and lock the brakes a few inches above the toe board. Still running the 4 drum brakes. However this master will still work if disc brakes are added in future. Well worth the money and safety of dual output and dual reservoir.

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I did this on my 52 special. I made my own bracket and used the stock mounting bolt holes in the frame. Then mounted the reservoirs on the fuse panel access cover. Factory pedal and linkage system to the new pushrod. The pedal seems to have a lot of travel before it gets firm but will stop the car and lock the brakes a few inches above the toe board. Still running the 4 drum brakes. However this master will still work if disc brakes are added in future. Well worth the money and safety of dual output and dual reservoir.

You will need power assist if you use disc brakes. Be sure any master cylinder is power assist or can be adapted later.

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Flintbuick...Thanks for relating your experience. I looked at the Scarebird bracket on Summitracing.com and one of the reviews talks about the remote reservoirs persistent leaking when mounted remotely. Have you had any trouble in that respect? And any thoughts as to why the extra pedal travel before the pedal becomes firm?

Alan

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Check out this simple mount from Scarebird, they also have a disk conversion bracket and bearing for the front https://scarebird.com/index.php?route=product/product&path=59&product_id=123

Thanks for the tip Yiwork. That looks like my best bet for something off the shelf and Flintbuick has installed the Scarebird setup in his '52 with good results he says. Thanks too, Felix and Old Tank, for your helpful input.

Alan

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We ran those remote reservoirs for a decade on our asphalt late models and had zero issues because we used hose clamps instead of the spring clips that came in the kits. Just my personal experience and .02 cents

Thanks for the .02 cents worth Yiwork. An important detail like that can be worth much more.

Alan

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On my 55 Special I used a 1970 Nova dual resi MC. Had to drill two holes in the stock bracket, make a new push rod, re-plum for the split system and smack the floor a couple times to get room for the cap bail to move. I was able to keep the stock access cover in place. It has the same bore as the 55 unit and works great. I've had to lock it up a couple times, not what I like to do but nice to know the old girl has it in her if needed.

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On my 55 Special I used a 1970 Nova dual resi MC. Had to drill two holes in the stock bracket, make a new push rod, re-plum for the split system and smack the floor a couple times to get room for the cap bail to move. I was able to keep the stock access cover in place. It has the same bore as the 55 unit and works great. I've had to lock it up a couple times, not what I like to do but nice to know the old girl has it in her if needed.

Any photos ??? Anyone know the pedal ratio of stock 51 Roadmaster ???

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