so you have no parking brake?
4wheel Disk upgrades
This is a copy off my webpage http://fireguy50.com/bronco/brakes.html
For discussion here on the forum
For discussion here on the forum
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2002-04 Lightning 4wheel disk 1-1/4" bore Master Cylinder
Stock 1980-96 Bronco Power Brake Booster
Proportioning Valve from Summit Racing
1967 Mustang Distribution Block (no proportioning valve)
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1972-79 ThunderBird 3-1/8" bore Front Calipers
Stock 1980-96 Bronco 11.72" Front Rotors
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1983-97 4WD S10 2-1/2" bore Rear Calipers
1977-86 Jeep CJ-7 11.75" Rear Rotors
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I had brake problems, and I drive too fast to depend on the stock brakes. My first problem was the combination valve mounted on the frame. After 20+ years I could tell a buildup of sludge was in there. I couldn't blow air through it, so I knew brake fluid couldn't freely flow to the front calipers. Replacing it would be costly and I didn't need the built in drum brake proportioning valve. I replaced it with a simple distribution block from a 1967 Mustang, and a separate adjustable proportioning valve.
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My second problem was finding a good rebuilt master cylinder. I didn't trust the rebuilt master cylinders using 20+ year old cores. So I choose a newer style aluminum master cylinder from a 2002 Ford Lightning Truck. It has larger 1-1/4" bore which fill the larger calipers pistons quicker. I am very happy with this decision, the whole system works great!
I kept the stock power brake booster because I've never had a problem pushing the brake pedal.
PLEASE DO YOUR OWN RESEARCH, MY IDEAS MAY NOT WORK FOR YOU!
Master Cylinder, Adjustable Proportioning Valve & Stainless Steel Lines
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Distribution Block & Stainless Steel Lines
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Front Brake setup
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Must have the early 80's knuckles to use these larger calipers
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Rear Brake setup
1 - 20 of 20 Posts
Schweeet. 
That's all that counts in the end.
One other variable you'll probably never be able to really obtain is the coefficient of friction between the brake pad and rotor. The brake pad companies regard it as a trade secret, and it's the same way with auto tires, too. We can get close on the approximate calculations, though.
My master cylinder feels like it wants to go south, and I've been putting it off forever, it seems. Sometimes if I'm coming off of the accelerator and HARD onto the brake, as in city traffic, or if I've been cruising for quite some time, it will require a couple of pumps to gain good "feel." Everything else in the system is new, adjusted, bled, and set up properly, so I'm starting to think about using a slightly larger master cylinder for better response. The brakes have NEVER been hard to push for me either, so a slight increase in force in the name of displacement wouldn't really hurt. I'll give it a look-see. :thumbup
Are the fittings on the Lightning master cylinder the exact same as the original's?
That's all that counts in the end.One other variable you'll probably never be able to really obtain is the coefficient of friction between the brake pad and rotor. The brake pad companies regard it as a trade secret, and it's the same way with auto tires, too. We can get close on the approximate calculations, though.
My master cylinder feels like it wants to go south, and I've been putting it off forever, it seems. Sometimes if I'm coming off of the accelerator and HARD onto the brake, as in city traffic, or if I've been cruising for quite some time, it will require a couple of pumps to gain good "feel." Everything else in the system is new, adjusted, bled, and set up properly, so I'm starting to think about using a slightly larger master cylinder for better response. The brakes have NEVER been hard to push for me either, so a slight increase in force in the name of displacement wouldn't really hurt. I'll give it a look-see. :thumbup
Are the fittings on the Lightning master cylinder the exact same as the original's?
Yeah, yeah. Same as the original on MINE though. Thanks.
Thanks.
I guess it wasn't a must have, but it has the brake warning light switch
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All those larger master cylindres are 7/16x24 and 9/16x18
No, 1987-96 Bronco master cylinder is M18-1.5 and 9/16x18Yeah, yeah. Same as the original on MINE though.
All those larger master cylindres are 7/16x24 and 9/16x18
Finally went to the j/y and got one of these because the parts guys at the ford dealership are idiots and didn't know about a part used on their trucks for 10 years.
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I gutted it out because i'm using 2005 sd axles with rear disks. Dual piston calipers and 14" rotors.
and then I started to gut the stock 79 bronco combination valve. I could only get #1 out. It looks like the bolt that takes #2 out is not actually a bolt and I cant get it out (at least I haven't tried hard enough to strip it out until I found out if it could come out)
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So where i'm at now is I have no limitation on the fluid going to the rear, and some limitation on the front by the factory combination valve.
My question is.....I could just take the lines directly from the m/c to the front and rear axles without a combination or prop valve? What was the purpose of having both going to a single point before distributed to the axles?
If I had a failure from one cylinder of the m/c I would still have brakes on either the front or the rear, which is the whole purpose of the two chamber master cylinder. Right?
Am I just completely off here?
Also, I have an 02 lightning m/c, will that push enough fluid for the dual piston calipers?
I gutted it out because i'm using 2005 sd axles with rear disks. Dual piston calipers and 14" rotors.
and then I started to gut the stock 79 bronco combination valve. I could only get #1 out. It looks like the bolt that takes #2 out is not actually a bolt and I cant get it out (at least I haven't tried hard enough to strip it out until I found out if it could come out)
So where i'm at now is I have no limitation on the fluid going to the rear, and some limitation on the front by the factory combination valve.
My question is.....I could just take the lines directly from the m/c to the front and rear axles without a combination or prop valve? What was the purpose of having both going to a single point before distributed to the axles?
If I had a failure from one cylinder of the m/c I would still have brakes on either the front or the rear, which is the whole purpose of the two chamber master cylinder. Right?
Am I just completely off here?
Also, I have an 02 lightning m/c, will that push enough fluid for the dual piston calipers?
2
1 - 20 of 20 Posts
