power brake delete
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CF Veteran

Joined: Oct 2010
Posts: 1,000
Likes: 3
From: West By God Virginia
Year: 1999
Model: Cherokee (XJ)
Engine: 99 4.0
If we measure in "units" to keep it simple, it takes 1 u^3 to depress all four brakes, then it's also going to take a certain force as well. Change the area of the MC then you also change the amount of pedal movement. However you did not change the amount of force it takes to moved 1u^3 of fluid. Hydrologic brake fluid (especially race fluid) doesn't compress or succumb to heat changes as easily as other fluids, so it will act as a solid. So when that force is applied to the rod the only way to change the foot pressure is pedal length or assisted braking.
CF Veteran


Joined: Jun 2011
Posts: 2,720
Likes: 44
From: Gainesville GA
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
Apparently you don't realize from all of the responses this is a bad idea. So, to answer "A", yes, it's a bad idea. "B", leave it the he!! alone, & "C" stop being a di@k when you read what you don't want to see/hear.
For your (and others ) safety should leave the braking system alone unless you are UPGRADING the system, as in the ZJ rear disc's on your rig.
You are sounding more like bimmerjeep than Jeff.
Just because it's not what you want to hear doesn't make it wrong. Do as you wish, but I pray to God you do it on a closed course & don't harm any animals in the process.
I read the title this morning & thought this was a joke. Well, I was wrong & so are you. Just suck it up & take all the advise for what it is. TRUE.
Unsubscribed.
Thread Starter
CF Veteran

Joined: Oct 2010
Posts: 1,000
Likes: 3
From: West By God Virginia
Year: 1999
Model: Cherokee (XJ)
Engine: 99 4.0
I'm not being anything but defensive. People get on here, don't know how to read, get butthurt then resort to name calling. I appreciate the look on the brake idea, because there is a small chance that I didn't realize the consequences but I shouldn't have to have 5 pages of me telling everyone that I understand the implied risks, but I'm going to try it anyway.
Honestly, being midseason I most likely will just leave it, until winter anyway and go about a solution then.
A very good option that white devil was in the neighborhood of,but no one brought up, is running an older jeep booster, they seem to be much narrower as well and could solve my issues
Honestly, being midseason I most likely will just leave it, until winter anyway and go about a solution then.
A very good option that white devil was in the neighborhood of,but no one brought up, is running an older jeep booster, they seem to be much narrower as well and could solve my issues
CF Veteran
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
I wouldn't recommend jumping to conclusions if you don't have any data to support your theory. If we measure in "units" to keep it simple, it takes 1 u^3 to depress all four brakes, then it's also going to take a certain force as well. Change the area of the MC then you also change the amount of pedal movement. However you did not change the amount of force it takes to moved 1u^3 of fluid. Hydrologic brake fluid (especially race fluid) doesn't compress or succumb to heat changes as easily as other fluids, so it will act as a solid. So when that force is applied to the rod the only way to change the foot pressure is pedal length or assisted braking.
CF Veteran
Joined: Aug 2012
Posts: 1,592
Likes: 0
From: oregon
Year: 1993
Model: Cherokee
Engine: 4.0 ho 99 intake ps pump 1" tb spacer 62mm bored tb eletric fans and more
I was just trying to help with ideas on relocating and making space we had to use a e34 resivor master cylinder on my buddies s52 swap e30 bmw do to room issues so I can understand needing more room.
CF Veteran
Joined: May 2012
Posts: 3,242
Likes: 2
From: Colorado
Year: 1992 Cherokee Sport
Engine: Bone-Stock 242
Get mad brah. First off if you had the intelligence of a first grader you wouldn't have to resort to swearing, and using words like "retarded" because expressing your thoughts without them is something that would be doable.
And I'd take riding my high horse over a junk 40 year old Pony any day.
And I'd take riding my high horse over a junk 40 year old Pony any day.
Everyone is attacking you here, because your intentions are so bluntly ignorant and dangerous. It happens all the time, and having 900+ posts, you should know that. If we're attacking you, you done ****ed up! We are even confronting you with solid facts. Yet, you're ignoring us and "Defending" yourself saying we're dumb asses. Most senior members here have real-world experience, working on real cars, and fully understand the fundamentals of how things work on cars. We have people who have posted in the VERY thread, who could rebuild an entire XJ. Through a computer.
All I have left to say is, if you REALLY must make that much more space, relocate the booster. If you don't see that as an option, have fun trying to stop every time you come to a stop sign. Oh, and good luck explaining to the cops why you couldn't avoid that other idiot that you'll inevitably hit.
Oh and, One curse word. Checkmate, *****.... Okay, two. I used to be an admin on a gaming server, I've dealt with 12 year-olds with more common sense than you. So, I can rant without cursing. You just caught me at a bad time... God I hate service advisers.
Last edited by 1976Mustang; Aug 29, 2014 at 07:30 PM.
Thread Starter
CF Veteran

Joined: Oct 2010
Posts: 1,000
Likes: 3
From: West By God Virginia
Year: 1999
Model: Cherokee (XJ)
Engine: 99 4.0
I've built,rebuilt,repaired,and restored more jeeps then you could swing a stick at, and not only am I an engineer I own my own shop.
Do I recommend doing this in any inexperienced persons daily driver? Absolutely not.
But you ranting just makes you look immature. Like I said I'm just gonna unhook it to see how manageable it is, before I completely get set on my decision then you got two options, one look like the inexperienced punk you are, or be the guy ranting in some dead guys last thread, maybe your right, and you can come to the funeral and hand out your big ol pile of I told you so's.
Do I recommend doing this in any inexperienced persons daily driver? Absolutely not.
But you ranting just makes you look immature. Like I said I'm just gonna unhook it to see how manageable it is, before I completely get set on my decision then you got two options, one look like the inexperienced punk you are, or be the guy ranting in some dead guys last thread, maybe your right, and you can come to the funeral and hand out your big ol pile of I told you so's.
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