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Old August 18th, 2008, 08:18 AM   #1
Sandals
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Default Need Some More Braking power?

Have you switched to 4 wheel disc brakes and are no having trouble stopping? or you just want some more oomph?

An Easy, Cheap upgrade is to use the Master cylinder our of a 1985 Ford E350, 1 ton Econoline Van.

This is a readily available for about $30.00 at almost any auto parts store.

It is ALMOST bolt-in. There are 3 modification needed.

1) you will need adapters to your hard lines from the master cylinder outputs, small little brass things they were $0.71 each at my local Napa.

2) the bolt holes need to be enlarged slightly, they are just slightly off, a 1/2" drill bit can be used to elongate the holes.

3) the "ears" on the mounting flange are a touch to big to fit into the brake booster, i spent 45 seconds with a Grinder and flap wheel and it slid on like butter.

The Install:

Once you have made the modifications above is very straight forward.
Bench bleed new master cylinder
drain old brake fluid from old master cylinder
unbolt the 2 lines coming out of it
unbolt the bolts holding it in place
remove
place new master cylinder on and bolt it down
re-attach the 2 hard lines
Bleed the system
You should be ready to go (and stop) now



I did this on a 1995 YJ that originally had the 2.5L I believe this will work on MOST CJ's, YJ's and TJ's with vacuum brake boosters.
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Old October 6th, 2008, 02:53 PM   #2
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I did this with a grand Marq master Cyl.
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Old October 6th, 2008, 03:24 PM   #3
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Whats the bore size on it? (I'll be running different calipers than most, so I need to figure out some hydraulic ratios...)
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Old October 6th, 2008, 03:28 PM   #4
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wow, that's cool.


Thanks for the info!
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Old October 6th, 2008, 03:29 PM   #5
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Quote:
Originally Posted by Haggar View Post
Whats the bore size on it? (I'll be running different calipers than most, so I need to figure out some hydraulic ratios...)

1.125"
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Old October 6th, 2008, 03:31 PM   #6
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thats good to know
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