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Discussion Topic:
Dual master cylinder 39 brakes
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SUPERTOOL |
09-26-2019 @ 8:45 AM
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Member
Posts: 22
Joined: Mar 2015
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My new master cylinder has two outlets. Can anyone recommend how I should hook it up to my system?/
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therunwaybehind |
09-26-2019 @ 8:51 AM
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New Member
Posts: 180
Joined: May 2019
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There are two possible ways diagonal to one front and one rear per outlet and the more symmetric one to front brakes and one to rear. The original master cylinder had only one outlet and a junction block with two outlets? Am I lost on this? My earlyfordv8book and experience is limited to 1941-48.
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CharlieStephens |
09-26-2019 @ 10:11 AM
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Senior
Posts: 894
Joined: Oct 2009
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Try your post on HAMB, https://www.jalopyjournal.com/forum/forums/the-hokey-ass-message-board.5/ You will probably get a better answer there. Charlie Stephens
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supereal |
09-28-2019 @ 10:31 AM
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Senior
Posts: 6819
Joined: Oct 2009
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Dual system brakes are a very good idea, but require more than just split the system. The conversion requires a "proportioning"valve to control the pressure between the from and back brakes. This allows control, particularly when road surfaces are not dry, when uneven braking can result in skidding.
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37RAGTOPMAN |
09-28-2019 @ 12:19 PM
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Senior
Posts: 1969
Joined: Oct 2009
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HI SUPERTOOL didn't the new master come with instructions ? the parts place should have information for you were you bought it, to what to do, give them a call, also you will probably need a double flaring tool and a proportioning valve that is adjustable and some brake line tubing, to start, dual master cylinder, ? my 2 cents 37Ragtopman
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woodiewagon46 |
09-28-2019 @ 3:21 PM
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Senior
Posts: 705
Joined: Nov 2012
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There is an excellent company called Master Power Brakes, www.mpbrakes.com, 704-664-8866. Their catalog is a wealth of information. You don't state what master cylinder you are using however many conversions use a Corvette style master. If that is what you are using then the port closest to the pushrod goes to the rear wheels and the end port to the front. As super states, there is more to a proper braking system then just replacing your master cylinder such as the mentioned proportioning valve and residual valves. Get the catalog and even give them a call. They designed two systems for me and my cars stop like modern cars.
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CharlieStephens |
09-28-2019 @ 3:24 PM
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Senior
Posts: 894
Joined: Oct 2009
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37Ragtopman, I hate to disagree with you but the only instructions that should have come with the master should cover how to remove/replace/bleed the one that was in the car. Expecting instructions on how to design a brake system is asking too much. The place where he bought it also shouldn't be expected to explain how to design a brake system. Charlie Stephens
This message was edited by CharlieStephens on 9-28-19 @ 3:26 PM
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therunwaybehind |
09-28-2019 @ 4:58 PM
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New Member
Posts: 180
Joined: May 2019
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Proportioning valves were for cars that had disk brakes front and drum brakes rear because of the different levels of force necessary to activate them, or the rear brakes would do most of the work. Also drum brakes rear held on because no separate little drum was not required for the emergency brake.
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37RAGTOPMAN |
10-01-2019 @ 3:44 PM
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Posts: 1969
Joined: Oct 2009
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hi CharlieStephens don't you think, a parts place should know, which master will work on what car, and what you need to make it work correctly ? they do this everyday, I am sure they must have some information on what they are selling,? other wise it might get expensive tying part after part to get it right ? I was just trying to help, my 2 cents 37Ragtopman
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CharlieStephens |
10-01-2019 @ 5:31 PM
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Senior
Posts: 894
Joined: Oct 2009
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37Ragtopman, Short answer, NO. I don't expect them to know about dual master cylinders used on '39 Fords. Charlie Stephens
This message was edited by CharlieStephens on 10-1-19 @ 5:34 PM
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