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1961 Chrysler Windsor brake master cylinder
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Arocket111
Posted 2023-03-23 4:50 AM (#628450)
Subject: 1961 Chrysler Windsor brake master cylinder



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Hi all I have recently bought a 1961 Chrysler Windsor 383 auto with power brakes , I wish to convert to a dual circuit brake system the power brake system on the car is working fine, so my first choice would be to replace the single circuit master cylinder with a dual circuit master cylinder keeping the original booster etc is this possible and which master cylinder is compatible to do this.
If above is not the best option which new brake booster master cylinder assembly is suitable to achieve dual circuit brakes

Thanks Phil any help greatly appreciated
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Powerflite
Posted 2023-03-23 10:57 AM (#628457 - in reply to #628450)
Subject: Re: 1961 Chrysler Windsor brake master cylinder



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Don't replace the booster with something else. You'll destroy the value and awesomeness of your unique car. The flat top master from the late '60's will fit under the stock booster. But I like to convert it to a remote reservoir using a master from a Mitsubishi Fuso truck. You have to elongate the mounting holes on a mill, but it isn't bad. The lower fittings are metric, so use the right tube nuts with it, and the remote reservoir comes from Classic Performance Products or Scott's Hot Rods. It has to be narrow enough to fit in there, which is the limiting factor.

Edited by Powerflite 2023-03-23 11:03 AM




(58FF Remote Brake Master.jpg)



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Attachments 58FF Remote Brake Master.jpg (169KB - 63 downloads)
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57chizler
Posted 2023-03-23 12:43 PM (#628460 - in reply to #628457)
Subject: Re: 1961 Chrysler Windsor brake master cylinder



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Powerflite - 2023-03-23 7:57 AM
using a master from a Mitsubishi Fuso truck.


What year and model?
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Powerflite
Posted 2023-03-23 1:01 PM (#628461 - in reply to #628450)
Subject: Re: 1961 Chrysler Windsor brake master cylinder



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1987-1995 Mitsubishi Fuso FE Truck. The FE designation here matters. They have a 1 1/8" diameter piston, so they match up well with the stock rear brakes. You can get them off Ebay or Rockauto for around $55-$60. 3/8" hose, made specifically for brake fluid (also available on Ebay) works best with it - 10mm hose is too big. Here is the oblongation required for it as well. Use a good flat washer under the nuts to distribute the load well.

Disclaimer: I haven't tried this yet with a 392 hemi motor to see if it fits. It's close, but too close to call it yet.

Edited by Powerflite 2023-03-23 1:22 PM




(Mitsubishi Fuso Master Mods.jpg)



(57NY Power Brakes Installed.jpg)



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Attachments Mitsubishi Fuso Master Mods.jpg (47KB - 61 downloads)
Attachments 57NY Power Brakes Installed.jpg (202KB - 59 downloads)
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Powerflite
Posted 2023-03-25 12:59 AM (#628509 - in reply to #628450)
Subject: Re: 1961 Chrysler Windsor brake master cylinder



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I realized that I didn't need to wait to put the 392 hemi into my New Yorker to figure out if this master would fit. I could try it out on my 300C instead, which is currently missing the master out of it. Unfortunately, it doesn't fit. It hits the valve cover both from the side and the bottom. I couldn't fully seat it on the firewall either.

I think it would work with an offset adapter, similar to the A-body hemi adapter. An offset to the left or upward might work. But I am wondering if it would be possible to mount the master from the inside and make it work that way. Something to think about when I get to that point.

Edited by Powerflite 2023-03-25 1:02 AM




(Mitsubishi Fuso Master on 300C.jpg)



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Attachments Mitsubishi Fuso Master on 300C.jpg (193KB - 66 downloads)
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Arocket111
Posted 2023-03-25 10:46 AM (#628515 - in reply to #628450)
Subject: RE: 1961 Chrysler Windsor brake master cylinder



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Just to clarify it’s a 1961 Windsor with drums all round the only space issue is height above keeping the existing power brake unit there is no forward space issues with rocker covers or other And I do not have the half round tank whatever it is ? shown on the right of powerfites reply
Photos of mc and booster below I can’t get them to show on the thread sorry
Thanks for the great replies so far any help greatly appreciated Phil

Edited by Arocket111 2023-03-25 12:29 PM




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Attachments 9AFA090D-ACF3-495C-BEEF-521E36088028.jpeg (45KB - 69 downloads)
Attachments 9C6EB6E9-F317-47FE-8FC8-33E30CE99A02.jpeg (228KB - 61 downloads)
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Powerflite
Posted 2023-03-25 8:11 PM (#628532 - in reply to #628450)
Subject: Re: 1961 Chrysler Windsor brake master cylinder



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Sorry, some of that info was for general knowledge, not specifically directed to you. Your photos will show on the thread if you save them as .jpg instead of .jpeg. It's easy to change them on a PC, but on a Mac, that is likely harder.

You do have that vacuum tank, it's just located in a different place - under the battery mount, I believe. These are the options with relatively flat tops that fit snugly under there, from '67-'71ish mopars. One problem with them is that the bore size is quite small at 1" diameter. That makes the brake pedal travel much larger than most people like it, and it forces you to keep your brakes fully adjusted so you don't lose any more pedal travel. The Mitsubishi master has a large 1 1/8" bore, that matches up well with our original master. However, it is made for disc brakes in the front, so it will likely require a 10 lb residual valve in the line in order to use it on an original setup.

Edited by Powerflite 2023-03-25 8:19 PM




(130.63009_Master.jpg)



(Mopar drum Master Cylinder.jpg)



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Attachments 130.63009_Master.jpg (55KB - 62 downloads)
Attachments Mopar drum Master Cylinder.jpg (47KB - 56 downloads)
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56D500boy
Posted 2023-03-25 9:08 PM (#628535 - in reply to #628532)
Subject: Re: 1961 Chrysler Windsor brake master cylinder



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This AM, I sent Phil the following info:

"I would probably stay with the OE power brake booster system. BUT you could probably switch to something like this (I bought one for a future project for my 56 Dodge)

https://www.rockauto.com/en/catalog/chrysler,1971,new+yorker,7.2l+44...

Regardless, I would stick with a 4 bolt master cylinder, in your case a drum/drum dual channel master like the RAYBESTOS MC36221 or CENTRIC 13063009 , as two of the low profile options listed here:

https://www.rockauto.com/en/catalog/chrysler,1967,new+yorker,7.2l+44...

https://www.rockauto.com/en/moreinfo.php?pk=309048&cc=1327104&pt=183...

https://www.rockauto.com/en/moreinfo.php?pk=1610838&cc=1327104&pt=18...

/Dave F"


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local2Ed
Posted 2023-03-31 7:13 AM (#628637 - in reply to #628535)
Subject: Re: 1961 Chrysler Windsor brake master cylinder


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^^^^^^^^^^^^^^^^^^
Those might be doable but it depends on the length of the bolt. You have to be able to unscrew the bolt completely but leave it in the cover, just like the original master cylinder.
I have an original master cylinder with power brakes on a 1958 Dodge coronet and it's a little tricky and done with finger tips but once you've done it a few times it's easy.

I just fill the master cylinder using a pointed cap from a gear oil bottle with a length of clear tubing on an brake fluid bottle to reach the master cylinder. Very easy to do.

I do have one of the dual master cylinders sitting on the shelf if you need a measurement of the cap bolt.
I don't know if the one with the flip over hold down would clear the booster though. If it did it would be very simple to pull the cap.
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Arocket111
Posted 2023-04-01 3:00 AM (#628651 - in reply to #628450)
Subject: RE: 1961 Chrysler Windsor brake master cylinder



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Posts: 64
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Thanks for all the replies very helpful indeed I have a virtually new mc I took off my dodge it’s exactly the same as the pictured mc with the bolt in so will fit I am keeping drum brakes as I have had all the drums off and everything is in really good fettle the back ones took some removing even with a five leg puller and shocking but came off eventually.
I am currently searching for a total contact brake bleeding procedure and set up procedure as I remember reading somewhere it is critical procedure is followed so I guess it is different to normal set up and bleeding any help with this appreciated
Thanks Phil


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madfins
Posted 2023-04-01 10:50 AM (#628660 - in reply to #628651)
Subject: RE: 1961 Chrysler Windsor brake master cylinder


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Earlier this month I added info on the new brake system and how to do proper bleeding procedures.

Loading here for reference -





(1960 plymouth brake adjustment 1.jpg)



(1960 Plymouth brake adjustment 2.jpg)



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Attachments 1960 plymouth brake adjustment 1.jpg (69KB - 67 downloads)
Attachments 1960 Plymouth brake adjustment 2.jpg (65KB - 68 downloads)
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madfins
Posted 2023-04-01 10:58 AM (#628661 - in reply to #628450)
Subject: Re: 1961 Chrysler Windsor brake master cylinder


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At the same time I included general writeups on the total brake contact system in the same 'brake' section.

Adding them here for your reference -



(New Three-Platform Total-Contact Brake Writeup 2.jpg)



(New Three Platform Contact Brake Writeup 2.jpg)



(New Center Contact Brake Writeup 3.jpg)



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Attachments New Three-Platform Total-Contact Brake Writeup 2.jpg (52KB - 69 downloads)
Attachments New Three Platform Contact Brake Writeup 2.jpg (54KB - 68 downloads)
Attachments New Center Contact Brake Writeup 3.jpg (39KB - 59 downloads)
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