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Old August 24th, 2012, 11:07 PM   #1
03tjsport
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Default Master cylinder question

I have a yj with a d44 front using the ford calipers and in the rear I am using the gm metric calipers. The problem I have is that I have a very low brake pedal. Seems to be bled fine. No proportioning valve at this time. I may add one later. Any idea on which master cylinder to upgrade to? I have seen some things about e350,grand marquis,and corvette,but that only added to the confusion. Thanks!
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Old August 25th, 2012, 09:55 PM   #2
wilinsonlevi
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I used the grand marquis master when I put my 60s in. I used stock yj prop valve. It will lock up all four 40s on pavement.
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Old August 25th, 2012, 09:59 PM   #3
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I think I need to find a proportioning valve. Auto parts stores say they don't sell them. I am also going to check the pushrod length. I do not think my existing master is a jeep part.
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Old August 25th, 2012, 10:59 PM   #4
Rob the plumber
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a dodge ram master cylinder works well with big brakes too.
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Old August 27th, 2012, 10:06 PM   #5
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So I pulled the master off and found that it was not seated properly to the booster. Needed to grind away some of the casting and chamfer the bolt holes. Also needed to lengthen the pushrod about 1/4". Seems to work fine. Locks up the front before the rear and has plenty of pedal.
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Old August 27th, 2012, 10:17 PM   #6
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http://www.speedwaymotors.com/Speedw...lve,24060.html

or

http://www.speedwaymotors.com/Wilwoo...ock,41747.html
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Old August 27th, 2012, 10:34 PM   #7
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Sweet. Did you figure out if it's the stock master and booster or not?
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Old August 27th, 2012, 10:37 PM   #8
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Quote:
Originally Posted by Rob the plumber View Post
Sweet. Did you figure out if it's the stock master and booster or not?
I think the booster is stock. Still not sure on the master. I may need to post a pic. They seem to work well at this point.
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