Jeep CJ7 rear disc brake setup help - JeepForum.com
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Unread 03-20-2013, 10:45 PM   #1
jarcher401
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Jeep CJ7 rear disc brake setup help

I am having trouble with my brake setup. I am using Isuzu Dana 44 rear with 12" rear rotors and a front FSJ Dana 44. What distribution block have people used with a rear disc upgrade. Would stock setup be ok with a 1/4 brake line going to 2 3/16" lines going to each disc at the rear? and 2 3/16" to the front.

Any help would be great.

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Unread 03-24-2013, 08:34 PM   #2
BlueRubiconrich
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JP mag I think ran a issue on that maybe try there.
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Unread 03-24-2013, 09:25 PM   #3
ratmonkey
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Doesn't need larger rear main line.
No proportioning valve works just as well as one from a disc/disc jeep like a grand.

Be sure your master moves enough fluid and your booster has enough pressure assist for the size calipers you're using.
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Unread 03-28-2013, 09:21 PM   #4
foggybottombob
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Be sure you have a 2# residual valve on the rear line. That is about right for small rear calipers. I have El Dorado rear calipers now on a rear Dana 60 and a 10# residual valve works well with those.
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Unread 03-28-2013, 09:50 PM   #5
ratmonkey
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Residual valves are for drum brakes. Disc brakes don't use them.
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Unread 04-02-2013, 04:55 PM   #6
foggybottombob
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Residual valves are definitely needed for at least some disk brakes. I had 300ZX calipers on a rear Dana 44 axle and no residual valve. You had to hit the pedal twice to get good rear braking. Drum brakes use a 10 # residual valve but disk brakes need something less like a 2#. If you have no residual valve one pedal push is not enough to move the pads enough to stop.
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Unread 04-02-2013, 07:07 PM   #7
ratmonkey
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Quote:
Originally Posted by foggybottombob View Post
Residual valves are definitely needed for at least some disk brakes. I had 300ZX calipers on a rear Dana 44 axle and no residual valve. You had to hit the pedal twice to get good rear braking. Drum brakes use a 10 # residual valve but disk brakes need something less like a 2#. If you have no residual valve one pedal push is not enough to move the pads enough to stop.
sounds like a band aid for a master that didn't have the volume to do what you needed it to.
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Unread 04-02-2013, 08:49 PM   #8
foggybottombob
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That makes sense. But it works.
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