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Unread 02-13-2008, 10:17 AM   #1
drunkenrich
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1980 CJ7 
 
Join Date: Feb 2008
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cj brakes to power brakes worth it?

Is it converting my stock 1980 cj brakes to the newer power brakes with the booster of the yj? how hard is it to do?

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Unread 02-13-2008, 11:05 AM   #2
Blthomas
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1979 CJ7 
 
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Mine isn't complete, but so far it's been easy.

I got a booster from a 94'ish YJ.

Cut the pushrod, used a tap and die to cut threads on it. No biggie, some cutting oil, did fine. Little tough since the rod is hard, but it worked out with some patience.

The coupler is out of the parts drawer at the hardware store. Still haven't welded mine.

Only four bolts connect it. I have a tubing bender, so I used it to help bend my brake lines around.

The guy I got mine from sold me the fittings for the YJ cylinder to the CJ lines. They fit perfect.

I need to bleed my master, then bolt her up and get her done.
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Unread 02-13-2008, 12:40 PM   #3
jayhawkclint
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Best mod I've done to date.
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Unread 02-13-2008, 12:48 PM   #4
Pog
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For what it's worth, I'm on my third CJ and my first to have power brakes. It's absolutely worth it and makes a world of difference to me. Especially if you have larger tires. I had to stand on the brakes of my '79 CJ5 and '79 CJ7 to stop sometimes. My '84 CJ7 with PBs works like a dream compared to the earlier two. I cannot speak to the value of you going through the conversion process to PBs but I cannot imagine you being unhappy with it.
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Unread 02-13-2008, 01:39 PM   #5
jatepper
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Quote:
Originally Posted by jayhawkclint View Post
Best mod I've done to date.
X2 Very easy to do! Much better stopping power. First time I tested them out my face almost smacked the windshield...poor windshield.

Bought a YJ booster from a salvage yard. Best $80 I have ever spent!
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Unread 02-13-2008, 05:40 PM   #6
smokencj7
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i put a yj booster on mine and didnt neet to do anything and it will lock all 4 up and it has 33 on it best mod i dont ather then the chevy blower motor





Quote:
Originally Posted by jatepper View Post
X2 Very easy to do! Much better stopping power. First time I tested them out my face almost smacked the windshield...poor windshield.

Bought a YJ booster from a salvage yard. Best $80 I have ever spent!
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Unread 02-13-2008, 06:00 PM   #7
RARECJ8
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since i went to 3/4 ton axles i needed proper stopping power. Getting those Chevy brake calipers to engage takes a lot of oomph! Went with the booster from Harold Off, called the Navajo brake booster. AWESOME! So perhaps consider that rather than the YJ set up. It works better than expected. After the MOPAR EFI kit, this was the 2ed best upgrade.

good luck.

mb
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Unread 02-13-2008, 06:29 PM   #8
John N
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Quote:
Originally Posted by RARECJ8 View Post
since i went to 3/4 ton axles i needed proper stopping power. Getting those Chevy brake calipers to engage takes a lot of oomph! Went with the booster from Harold Off, called the Navajo brake booster. AWESOME! So perhaps consider that rather than the YJ set up. It works better than expected. After the MOPAR EFI kit, this was the 2ed best upgrade.

good luck.

mb
Ditto, I did the same. Amazing difference, I wouldn't go back.
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Unread 02-13-2008, 07:00 PM   #9
Rollbar
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Well I was going to swap but instead I installed a set of NAPA Safety Stop Brake pads/shoes (couldn't get the ones I wanted from O' Riley's quick enough) & turned the rear drums (front disk), installed, adjusted & everything works better than new. I never had brakes work this good on a CJ.

Oh, I forgot to tell U that I have manual MC/brakes on 33's & it locks up the rear & stops very well. IMO, I like the manual brakes for obvious reasons, no motor, still stops, on road/off-road.
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Unread 02-13-2008, 07:45 PM   #10
drunkenrich
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do i need to change the brake lines at all?
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Unread 02-13-2008, 07:50 PM   #11
Rollbar
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I changed out my 22 yr old brake lines & it did help big time. New wheel cyl & all, the whole works.
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Unread 02-13-2008, 08:37 PM   #12
Blthomas
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If they are in decent shape, not IMHO.

Mine are good to go with new stainless extensions, you just need the fitting to go from your CJ line to the hole on the booster.

Even if the guy hadn't sent them I was going to just take the master cylinder down to Napa and figure it out.

The numbers are listed on busted jeep dot com or somewhere for those fittings.

This is a pretty sweet mod from the couple guys I hear I work with that have CJ's and done this.
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Unread 02-13-2008, 09:40 PM   #13
Fjguercio
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I am spoiled. My 1978 CJ7 came with the big disk brakes front and big drum brakes on the back. I think my CJ came with power brakes and power steering as stock. I can lock them up to stop easy with 33's and jeep stays straight. BUT.... if you jeep stops running on a hill or when you need the brakes you better have strong legs.

HighCountry or MrCrowley also posted that the BRAKE SHOES you use on the CJ make a big difference on the brake performace. Std or Power. I printed and kept the info somewhere for this summer I have to look at the brakes and ck their status. They had one or two they knew worked well. They may post here again or if need I can try to find it. It was posted only a month ago or so.

Can anyone tell me is this the STOCK BRAKE BOOSTER FOR 1978 CJ7??

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Unread 02-13-2008, 09:47 PM   #14
jeepskate
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Yes, that's stock.
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Unread 02-14-2008, 09:04 AM   #15
Fjguercio
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VERY COOL, Thank you for the feedback Jeepskate.
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