dual master cylinder
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From: Redding USA
dual master cylinder
I am interested in changing my single master cylinder to a dual and read the tech article on F-100 pickups through 1964. I have a 66 F-250 4x4 and was wondering if the 68 mustang master cylinder will also bolt up to my truck.
Postmaster
Joined: Jan 2003
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From: Conway Arkansas
dual master cylinder
Im not positive, but I'm sure it would.
Just go to a parts store and ask for a master cylinder for that year model truck. You can't buy a master cylinder with just one tank on it anymore... they quit making them a long time ago for safety reasons (hole in lines all 4 breaks go out. With 2 tanks... hole in line... only front or rear goes out)
Just go to a parts store and ask for a master cylinder for that year model truck. You can't buy a master cylinder with just one tank on it anymore... they quit making them a long time ago for safety reasons (hole in lines all 4 breaks go out. With 2 tanks... hole in line... only front or rear goes out)
Laughing Gas
Joined: Oct 2001
Posts: 957
Likes: 3
From: Winchendon MA
dual master cylinder
Yes it will work.
You might find the master from a 66-70's Bronco would suit you a little better as it has the lines coming out toward the fenders and it has the same sized bore as your exciting single master.
44Dwarf
PS: they still sell single cyl master you just can't buy a new car with them.
You might find the master from a 66-70's Bronco would suit you a little better as it has the lines coming out toward the fenders and it has the same sized bore as your exciting single master.
44Dwarf
PS: they still sell single cyl master you just can't buy a new car with them.
Postmaster
Joined: Jan 2003
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From: Conway Arkansas
dual master cylinder
I apologize.
I didn't know you could still buy them. When I checked into it at local parts stores they said they didn't sell them anymore.
I figured that meant nobody could get them (as I checked 4 stores. lol) My apologies on my mistake
I didn't know you could still buy them. When I checked into it at local parts stores they said they didn't sell them anymore.
I figured that meant nobody could get them (as I checked 4 stores. lol) My apologies on my mistake
Senior User
Joined: Mar 2002
Posts: 227
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From: Kent, WA
dual master cylinder
For my 65 F-250 4x4, I used a master cylinder off of a 78' F-150, and I used the push rod off of a 67' mustang. It works great haven't had a problem yet. It's a little tricky getting your brake switch figured out, but it's managable.
Logistics Pro
Joined: Feb 2000
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From: Sun River St. George
dual master cylinder
Scott, this conversion is fairly straight forward, but it can be a real PITA if you are not careful. Before you take the truck apart, do a little research in the Junk Yard. You have drum/drum on your truck now and dual chamber MC's are available for this set up. Dual chamber MC's for disk/drum are different than dual chamber MC's for drum/drum. While you are at this project consider adding a power booster. Check out www.mcbrakes.com and their catalog is actually an excellent manual on these conversions.
William in Atlanta
William in Atlanta
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Joined: Feb 2002
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From: Washington State
dual master cylinder
Guys,
I have been watching this post, and I am always concerned about this topic as I am wanting to put a power boost/master cylinder set up in my '63. I am looking for something that would bolt directly to my firewall. I am installing the ECI front disc set up but do not have the power boost/master cylinder yet. My neighbor gave me a complete set up from an '86 Tans Am, and he claims it "worked when I drove it home." With a little modification, it will bolt to my firewall, but I was hoping to find something that fit w/o mods to the firewall or bracket. As I am attempting to paint etc. everything, I didn't want to spend a lot of time on this Trans Am stuff w/o knowing if the system does work. (Besides, GM stuff in my Ford kinda makes my skin crawl, but then again free is a great price) My local brake guys claim they can't (suspect don't want to) check the vacumm to determine if it is any good. This being said, when you guys get something like this out of your local bone yard, how do you know it works? Any insights? Thanks,
Jim
I have been watching this post, and I am always concerned about this topic as I am wanting to put a power boost/master cylinder set up in my '63. I am looking for something that would bolt directly to my firewall. I am installing the ECI front disc set up but do not have the power boost/master cylinder yet. My neighbor gave me a complete set up from an '86 Tans Am, and he claims it "worked when I drove it home." With a little modification, it will bolt to my firewall, but I was hoping to find something that fit w/o mods to the firewall or bracket. As I am attempting to paint etc. everything, I didn't want to spend a lot of time on this Trans Am stuff w/o knowing if the system does work. (Besides, GM stuff in my Ford kinda makes my skin crawl, but then again free is a great price) My local brake guys claim they can't (suspect don't want to) check the vacumm to determine if it is any good. This being said, when you guys get something like this out of your local bone yard, how do you know it works? Any insights? Thanks,
Jim
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Logistics Pro
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From: Sun River St. George
dual master cylinder
I core almost all the stuff I get from the Junk Yard. But there are always exceptions. I recently scored a remanufactured 9 inch booster and dual chamber MS and all the linkage. This swap Disk/Drum is easy and parts are plentiful. I think if I started with ECI, I would complete the job using their parts. The power drum with dual chamber MC is a bit trickier. You are right to be concerned about anything brake related.
William in Atlanta
William in Atlanta
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Cargo Master
Joined: Apr 2001
Posts: 2,697
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From: Vancouver
dual master cylinder
I'm using a Fenco #NM1485, (Wagner#F73323). It might be a Granada oe item, I'm not sure. It works fine, although it does not entirely cover the firewall hole. It is intended for a drum/drum system, and pedal feel and travel are the same. No brake light switch port though...
Eric D
Eric D
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From: Redding USA
dual master cylinder
First, I want to thank everyone for their input. Second, I have a couple of more questions. Is the 66-70 bronco master cylinder for a drum/drum application? Is the 68-70 mustang master cylinder for a drum/drum application? Is a proportioning valve required if I maintain my existing drum/drum set-up? I think that I will maintain my brake light switch set-up as is and was wondering if either dual cylinders mentioned above used the same type switch?
Logistics Pro
Joined: Feb 2000
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From: Sun River St. George
dual master cylinder
Scott, You need a MC designed for drum/drum. These have a smaller spool 15/16 I think and use an intergral valve that maintains residual pressure in the lines after initial application of the brakes. You must have this on drum/drum systems. The brake pedal ratio is different also so that you can apply more pressure. If you add a booster it would be an 8 inch or smaller. I strongly recommend you buy the Master Power Brake catalog or use the same company you bought the other parts from. You do not need a combination valve with drum/drum. You will need a block to connect the lines from the MC to the front and rear brakes. Some of these blocks have a provision for a brake system failure warning switch. Using the hydraulic stop light switch is OKAY! The mechanical switches are neater in that they mount under the dash verses on the fire wall. Go to the Junk Yard and find a truck with dual chamber MC and drum/drum. Follow the brake lines and grab the parts you need, then core the MC and assemble your system. Get a line flaring tool from Sears and learn how to make double flares on steel lines.
William in Atlanta
William in Atlanta
Laughing Gas
Joined: Oct 2001
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From: Winchendon MA
dual master cylinder
Yes the Bronco 4x4 Master is drum / drum master and the bronco has the same size drums and wheel cyl therefore is a good swap!
I used infor from rockauto.com to make sure of this. You can click on year, model, part and then get info on part like bore size etc.
Now someone asked on power brakes. They did offer a Drum / Drum bronco with power brakes but good luck finding one. I'd not go with and used parts for brakes just cause my life is not replaceable.
Good luck!
Oh and if you go power replace all your lines!! runber and metal!
Oh as for the brake light switch This I'd get from a junk yard bronco it hose clamps to the streering colum in side the cab. The one under the hood is the rev switch
44
I used infor from rockauto.com to make sure of this. You can click on year, model, part and then get info on part like bore size etc.
Now someone asked on power brakes. They did offer a Drum / Drum bronco with power brakes but good luck finding one. I'd not go with and used parts for brakes just cause my life is not replaceable.
Good luck!
Oh and if you go power replace all your lines!! runber and metal!
Oh as for the brake light switch This I'd get from a junk yard bronco it hose clamps to the streering colum in side the cab. The one under the hood is the rev switch
44
Last edited by 44dwarf; Jan 30, 2003 at 07:22 AM.
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