Master cylinder / booster mount

[007]

Do the bolts that hold the vacuum booster screw into the firewall or do they have nuts behind them?


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[Jimbos76cj]

The 4 bolts that bolt the booster to the fire wall go through the fire wall and through the column/pedal mount assembly. I think the nut is on the out side with the bolts through the inside mount.

 

[007]

Well rats. My bolts head into the firewall so the nuts are on the back side on mine evidently. Thank you.


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[007]

One other question would I be better off with a larger or smaller booster? I guess I don't know what the difference would be.


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[Jimbos76cj]

I would get the ones that supposed to come with your jeep.. A larger booster may cause clearance problems under the hood.

 

[gert]

One other question would I be better off with a larger or smaller booster? I guess I don't know what the difference would be.


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without going to the more expensive aftermarket set up buy the dual diaphragm brake booster for the late 1995 Wrangler it will be a nice upgrade over the stock single diaphragm

CJ to YJ Brake Booster Conversion - Street2Mud - Welcome!

 

[007]

We'll I ran across a CL deal where I got the firewall mount, 2 boosters (6 and 7), a separate vacuum canister, and master cylinder ALL NEW for $60. He went with a system that runs off power steering similar to what early diesel pickups had. He had a nice clean shop and a snazzy CJ5 . He got two diaphragms due to clearance worries with many things besides the hood. Both of these are smaller than my stock one but don't know which is best or why.


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[007]

So can anyone tell me if the larger or smaller booster is best? I'm assuming the larger one is better...???

 

[Torxhead]

So can anyone tell me if the larger or smaller booster is best? I'm assuming the larger one is better...???

Yes, bigger is better. Providing you will be running larger than 31" tires, and have the clearance for one.

 

[007]

Yes, bigger is better. Providing you will be running larger than 31" tires, and have the clearance for one.

Running 31's... I'll have the clearance as this one is a tad smaller the stock, but I have the canister as well...

 

[007]

So what's the trick to getting the vacuum booster detached from the mount that mounts to the firewall?


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[007]

So what's the trick to getting the vacuum booster detached from the mount that mounts to the firewall?


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Nevermind. I've got this almost done now. Ba-bam...


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[007]

So two things...

One, my brake lines don't fit my new master cylinder. What's my best option. This was a Craigslist kit so if I have to get a different MC I can.

Secondly, how do I plumb in this vacuum reservoir / canister into the vacuum booster?

Thanks in advance.


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[Torxhead]

You might have to get a custom brake line or come up with an adapter to hook up that master cylinder. Interesting that you are installing a vacumn reservoir, are you having a low vavumn issue? The later CJs came with them to operate the emissions stuff.

 

[007]

You might have to get a custom brake line or come up with an adapter to hook up that master cylinder. Interesting that you are installing a vacumn reservoir, are you having a low vavumn issue? The later CJs came with them to operate the emissions stuff.

I found the "right" master cylinder at Autozone for $30, so it'll be here to tomorrow. It'll be cheaper than the adapters and the 4 trips back there to get the right set for what I think I'm trying to do.

The reservoir was a freebie that came with the setup I have. The guy I bought all this off of had a bada55 CJ5 with a "built" 350 in it and he subsequently had low vacuum. He went with a brake system that works off the power steering pump (like old GM diesels had) so all this came for sale.

My thought with it was that there's never anything wrong with having additional vacuum capacity is there? Even if it only helps keep my QuadraTrac in full-time FWD...

I just don't know how to plumb it in...

 

[007]

Well I just found it. For those who care it just goes in the middle between vacuum source and booster. Goes vacuum to check valve on can then out the brass fitting to destination.

In my case I'm going to T off a line or two to the QuadraTrac diphragm for added security.


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[Torxhead]

For a real test of it, you could complete your brake system, and later install that vacumn thingy and report back.

 

[007]

For a real test of it, you could complete your brake system, and later install that vacumn thingy and report back.

I agree.

I'm going to plumb everything up, replacing all my vacuum lines and put a few capped off T's in for spot gauge hook ups and see where I am when the dust settles.

I know I want the best / most consistent vacuum going to my brakes and my QuadraTrac , so "if" I end up using this thing it will feed those and probably nothing else but a gauge hooked to the can.