Any one out there using a 4wheel disc kit that works well. I have talked to both MP brakes and Off-Again about their kits, any one using them?

I have tried 4 different master cylinders with my manual brakes and I just can not get them to perform. I have decide to just buy a kit with a power boster and be done with it. In the long run it will be cheaper than messing around any longer (cost of body damage due to not being able to stop and master cylinder guesses). I am running stock CJ discs up front and a high pinion Currie 60 w/ Ford Explorer disc in back.

Who is using a kit that they like?

Thanks,
Tony

Is this what you are looking for?

http://www.samsoffroad.com/samsoffroadsto/index.html

oops....

Once you get to sam's look at this "Dual Diaphragm Brake Booster and Master Cylinders for Jeeps"

I like. You wouldn't happen to be running one would you. I will give Sam a call.

Anyone else?

sams is expensive! i have heard that you can put a 68 corvette master cylinder on a jeep powerbooster and it works very well for about 40 bucks. don't know for sure but im doing it this weekend

I do not have one. I was thinking of running it as soon as I get disc breaks for my rear.

I run 4 wheel discs on my CJ5

Chevy fronts and rear. 68 1 1/8 bore(makes a difference) Vette master

The master will bolt to a stock jeep vaccum booster.

But for my setup I wanted manual brakes, I can lock my 36 swampers up 45 miles an hour..

The pedal is VERY firm

piazza is there more than one vette master cylinder? if so how do you tell which one is the 1 1/8.

Yep the bore sizes are different

theres a 7/8s bore, and a 1 1/8th bore

Part number is the only way to tell

The SSB rear brake kit uses good hardware... BUT it is far from a "bolt on". It will take some tweaking to get it right. They were basically useless on the Tech Line.

Here ia a copy of one of my previous brake booster posts...



Booster Upgrade ...
Remove all the original CJ brake stuff.... master, booster, any linkage.

I took the setup from a wrecked ZJ. Pulled the master and booster. (It's the usual dual diaphram booster). Look and see which port is front and rear - MARK IT!

It's a tight fit, but can be mounted in a CJ. You have to use that spacer between the firewall and dash. Make sure you get it. You might have to "clearance" the hood reinforcement for the resevoir. (we did 2 CJs .... one was ok, the other needed a bit of hammer power)

Center up the new unit as LOW as you can in the existing opening and drill 4 new holes to mount. ( Remember, keep as LOW as possible) Have to open up the center hole to clear the new booster. ( You'll see when ya get to this point.)

The rod fits right on a CJ brake pedal ( at least on my 85, I assume all CJs ?)

Bolt it up tight. don't push the pedal yet! might damage something in the booster/master.

I removed the stock prop valve. Used a T fitting to marry up the original front lines and ran them DIRECT to the master cylinder.

I plumbed the rears with an adjustable prop valve for street tuning. ( A dedicated trail rig might be able to skip this ?? )

Set up of prop valve: Get on some smooth blacktop.... lock em up from about 25 mph. Have a bud watch your tires. Back off the rear brakes until the front brakes lock up first, or at the same time. Very important! If the rear locks up first, this can cause a spin. (Trail rigs are exempt from this step )

NOTE: The ZJ master uses metric fittings... I found metric to standard adaptors at NAPA. But it was a PITA to get the right ones.

I am running 33's with 4 wheel discs. I can lock them at any speed. Almost too much boost.



:smokin:

Originally posted by WheelingPiazza
Yep the bore sizes are different

theres a 7/8s bore, and a 1 1/8th bore

Part number is the only way to tell

you wouldnt know the part number would you?

Chris G.

piazza that was about the most useless quote i have seen in a while. how about a part #

I need to know a cheap and the best way to put in a brake booster into my CJ. running a 304 right now, hopefully 350 soon. Is there a 1 ton truck or something at junkyard that you could take all the booster stuff off and use in jeep? what about a vacum port to the engine? i have corvette discs fornt and chevy 2002 suburban discs rear and hav eno way to take full advantage of them. woudl i get a better system know if i bypassed my proporitoning valve? i am running still stock setup on brakes, no booster, valve set up for discs/drum. thnx.

CU4WHLN, thanks for taking the time to list the directions. I will search the bone yards this weekend.

So you really like this set up then?

CU4WHLN, thanks for taking the time to list the directions. I will search the bone yards this weekend.

So you really like this set up then?

Sorry about that double post.

I was calling bone yards and here are a few questions that came up.

Anti lock or Non-anti lock brakes? Does it matter?

Should I look for any certain year?

Thanks,
Tony

I used a non anti lock unit. However, I think the booster and master are the same. The anti lock equipment is downstream of the booster and master.

I used a 98 ZJ as a doner vehicle. I suspect ... all the years are the same. The booster changed in 99 when WJ replaced ZJ.

Yes, I like this setup very much. A great and cheap upgrade.

FWIW:
A friend of mine is in the Rock Crawling competition with a CJ. We did this setup on his, and he is very happy with the performance.
:usa: :usa: :usa: :usa:

One more question. I found one off a 96', the problem is that it was not a pick -n- pull yard, theirfore I was not able to mark the ports for front and rear. Do you recall which is which on yours?

Also, you wouldn't have any pics would you?


Thanks,
Tony

HAHaha Fuck you both..

When I am at work and hte jeep is at home its a little hard to get partnumbers dont you think?

But you know you could do it the oldfashion way, call your parts store and ask? :flipoff2:

29969 is the part number you fucks.

ok so i tried this, this weekend and can't get any brake pressure. i tried pumping and bleeding for about 45 minutes. the master cylinder seemed to bolt up properly and match the booster but no luck. I got the one for a 68 corvette with power brakes, there was an option for one with a non-power option they didn't have it for me to look at. I also couldn't really tell but the piston was bigger than my jeeps piston but i couldn't tell if it was the 1 1/8

Sorry... no pics from here. I'm pretty much old tech.

The front port on my WJ booster is for the rear. Go find a ZJ and look at it for confirmation.

You can figure the rest out from there ..... right !?

:rolleyes:

Good Day.

Originally posted by swamper502
ok so i tried this, this weekend and can't get any brake pressure. i tried pumping and bleeding for about 45 minutes. the master cylinder seemed to bolt up properly and match the booster but no luck. I got the one for a 68 corvette with power brakes, there was an option for one with a non-power option they didn't have it for me to look at. I also couldn't really tell but the piston was bigger than my jeeps piston but i couldn't tell if it was the 1 1/8

Did you bench bleed the master cylinder?

no oldjeep i don't know how?

also Piazza is this the chevy # or some after market place? do yo know if it is the one for power or manual brakes?

Originally posted by swamper502
no oldjeep i don't know how?

also Piazza is this the chevy # or some after market place? do yo know if it is the one for power or manual brakes?

Ok, well there's your problem. For master cylinders that don't have a bleeder, you need to bench bleed them - or you can do it in the jeep - It's just messier that way.

Get a couple of really short brakelines and bend them in the shape of a C. You attach them to the MC and the open end goes into the reservoir - the ends must be submersed. Pump repeatedly, that will get the air out of the bottom. Then re-hook up the lines in the jeep and bleed the brakes normally.

the master is for both manual and power, Either or.

That partnumber is whats on the master and its a chevy partnumber.

Originally posted by WheelingPiazza
HAHaha Fuck you both..

When I am at work and hte jeep is at home its a little hard to get partnumbers dont you think?

But you know you could do it the oldfashion way, call your parts store and ask? :flipoff2:

29969 is the part number you fucks.

:flipoff2: hey i got my ass off the sofa and went and got me one! so piss off! hehehe

thanks for the infor i did not know they had two diff bore sizes, i got the bigger one and i can lock up my 36's at 35mph

Chris G.

chrisjeep7 how did you know that you got the bigger one? where did you buy it and what is the part #

Haha Scroll up, you will see the part number.

Piazza what is your problem, if you don't have anything to add then go away. not all parts places carry the parts under the same # for instance the master cylinder i got wa m1076 or something not the chevy part # but hopefully the same part