| SUPERTOOL | -- 09-26-2019 @ 8:45 AM |
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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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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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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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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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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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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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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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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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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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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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| woodiewagon46 | -- 10-02-2019 @ 5:32 AM |
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What the original post is doing, is basically building a custom brake system for his car. As Charlie points out, how can you expect a parts house to know all the facts about the build. There are dozens of master cylinders available and each is different in one way or another. Bore size, outlet sizes, outlet position etc. Properly changing from a "fruit jar" single reservoir, master cylinder to a dual reservoir piece involves more than simply swopping the master cylinder. What bore size do you need, are the brake line sizes adequate, do you need more pressure or more volume? You need to deal with a brake specialty shop, as I originally suggested. Don't fool around with your brakes!
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| 37RAGTOPMAN | -- 10-02-2019 @ 9:05 AM |
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hi woodiewagon46 I am with you , brakes are the number 1 item , deciding on what master cylinder to use, the parts store that sells them should have a little knowledge, what might work and what might, not, and what to use with it, I think when SUPERTOOL ordered the master cylinder he told them what he was going to install it on, all I said was he needs to make up lines and install a adjustable valve,, it might take a few tries adjusting the adjustable valve, so the brakes do not lock up, either the front or rear, could cause a spin out, if not adjusted correctly., there is brake pressure gauges to test the pressure for the front and rear, so this does not happen, I used one of these tools in a auto dealership. for testing brake fluid pressure. using spec's from car maker, SUPER TOOL let use know what exactly you did to make this work correctly. thanks my 2 cents 37Ragtopman sorry about the mistake in your name, woodiewagon 46 this is what I wanted to write, but I am use to using RAGTOPMAN so you see where the mistake is, SUPER TOOL will need to go to a Brake specialist so he is safe with his project, for answers I never go to the local auto parts stores for anything, except for oil and a battery for my 37 This message was edited by 37RAGTOPMAN on 10-2-19 @ 12:27 PM
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| woodiewagon46 | -- 10-02-2019 @ 11:31 AM |
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Well, there is a woodieman46 on this site but that's not me, I'm woodiewagon46. I'm not knocking anything you say except for the fact that the parts store probably won't have a clue about the specifics on a master cylinder. If he went to the same parts store that I go to they would have a hard time knowing a spark plug from a muffler. If he told them he wanted to install a dual reservoir master in a '39 Ford, I would bet not one counterperson would have a clue what he was talking about. Every time I go to my local parts store for something, even if it's a generic part the first thing they ask me what year the vehicle is. When I say 1946 they say "it's too old, it's not in the system". I then need to go into a long discussion about how the part will work even though it's not listed in their computer. The days of the old time parts store with the knowledgable counterman are gone. As I suggest he needs to contact a brake specialist.
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| SUPERTOOL | -- 10-03-2019 @ 12:39 PM |
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Thanks WW, my master cylinder is from MPBrakes, I will check their recommendations.
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