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  • cj/yj power brakes

    Has anyone tried upgrading to power brakes using a yj booster and a cj master cylinder for manual brakes. I have those parts and wondered if anyone knows if it would work. Also which proportioning valve would you use the cj or the yj. Any information is appreciated.

  • #2
    Originally posted by buffalojeep
    Has anyone tried upgrading to power brakes using a yj booster and a cj master cylinder for manual brakes. I have those parts and wondered if anyone knows if it would work. Also which proportioning valve would you use the cj or the yj. Any information is appreciated.
    Don't think that will work. Check here. Good Info on upgrading CJ manual brakes using the YJ parts.

    http://www.bustedjeep.com/projects/yjbrakes.asp

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    • #3
      http://www.mpbrakes.com/jeepboosters.htm What year is yours? I had much trouble with the YJ booster on my 77. The brakes disc and drum are larger than some of the later model CJ's and the return spring in the YJ booster wasn't enough to return the fluid to the reservior. This causes the Jeep to brake even when I wasn't pressing the pedel. I was told several times the YJ conversion would work for me. The Master Power Brakes conversion works INCREDIBLY well and bolts right in. Read carefully to make sure you get what you need. I have pics too. Check it out...

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      • #4
        Oh Yea....your question. The CJ manual master will not fit the YJ booster. Bolts on the booster will not line up with the holes on the master. Would be nice though huh? No brake line work then.

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        • #5
          $459.00! That's madness.

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          • #6
            This is possible on late model CJ's. I've been planning on doing it to my 86 for a while now.

            Try searching for this over on Jeepsunlimited. I know there are several posts in the CJ forum covering the conversion with boneyard parts.

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            • #7
              I got what I paid for in performance. It really works well and I tried the cheap route several times over.

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              • #8
                Originally posted by cj-7
                $459.00! That's madness.
                Yeah, and some ARSE KICKIN' brakes, too!

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                • #9
                  Thanks guys I'll keep these in mind when I start putting this thing back together

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                  • #10
                    I considered installing power brakes on my '75 but then I thought if the engine died while crawling down a steep grade I would have no brakes, or little at best. If you plan on mainly road using your ride then it might be worth installing power.

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                    • #11
                      Originally posted by xlr8n
                      I considered installing power brakes on my '75 but then I thought if the engine died while crawling down a steep grade I would have no brakes, or little at best. If you plan on mainly road using your ride then it might be worth installing power.
                      I had the same plans and then concerns myself. First was going to do the YJ upgrade, then decided to go with this http://www.vancopbs.com/category_s/90.htm

                      Decided not to do the install after thinking I would not have good brakes if I stalled out (carb'd)

                      I recently made that comment on another(?) forum and someone said that they did the vanco brakes and that you still good brakes with this setup if the engines dies. Claims that the system retains some vacuum so that the brakes will continue to work like normal for 2 or so more peddle pumps.

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                      • #12
                        That is a great site. After looking it over I came across the hydroboost they offer. http://www.vancopbs.com/product_p/200j.htm

                        If you were to go power assist and had the cash to spare, I would highly recommend the hydroboost. This is by far the best setup in my opinion. I currently have the hydroboost in my K2500 and it works great. I also had it in my old '78 Chevy deisel conversion and it was very reliable.

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                        • #13
                          What do you guys think?

                          Originally posted by xlr8n
                          ...If you were to go power assist and had the cash to spare, I would highly recommend the hydroboost. This is by far the best setup in my opinion. I currently have the hydroboost in my K2500 and it works great. I also had it in my old '78 Chevy deisel conversion and it was very reliable.
                          Guys, I like the idea of the hydroboost system, too, but I've read outside the vancobps (sp?) site that they can be too touchy for highway use in a Jeep. They don't take up nearly as much room under the hood, though, and they don't rob vacuum. (Takes an upgraded power steering pump...) xlr8n, those are some big heavy machines you mentioned with the hydroboost. What do you think about how that system would work in a lighter Jeep on a wet highway?

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                          • #14
                            Originally posted by blackwater
                            What do you think about how that system would work in a lighter Jeep on a wet highway?
                            In general hydroboost is more responsive than vacuum and would take getting used to after installing it in any vehicle. I would think as long as you had front disc brakes you would really like it once you got used to it, in any weather conditions.

                            As for crawling, it may relieve some of the "pucker factor" from the downhills.

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                            • #15
                              i got my power break upgrade from piratejack.net. booster,master and bracket for around 200.00, i have better breakes now than in any of my cars. works great thats a 100% better than what i had.

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