Rear 20 Disc Upgrade - Page 3 - JeepForum.com

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post #31 of 67 Old 12-10-2009, 10:31 PM
Totallymetal
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This is the one I started out with. Printed it out, marked it out on a piece of metal and had a friend cut the shape with a plasma cutter. I did mark the holes mocked up in place with clamps. The piece on the left is for mounting the emergency brake, I haven't got around to doing that yet.



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post #32 of 67 Old 12-11-2009, 02:59 AM
wrongway92407
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Thanks, I can transfer this and with a little bluing cut that out on the mill. I was shopping for parts and found a 300Z but didn't have all the tools I needed but will get the stuff this weekend. Thanks again!
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post #33 of 67 Old 12-14-2009, 05:49 PM
CJman77
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Originally Posted by Totallymetal View Post
This is the one I started out with. Printed it out, marked it out on a piece of metal and had a friend cut the shape with a plasma cutter. I did mark the holes mocked up in place with clamps. The piece on the left is for mounting the emergency brake, I haven't got around to doing that yet.
Hey totallymetal what did you do about rear brake lines? I am using the 96 maxima calipers and I am wondering if the stock maxima line will work? Do I need to buy stock lines and have the ends changed? thanks

What did you do?

Last edited by CJman77; 12-14-2009 at 06:00 PM.
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post #34 of 67 Old 12-14-2009, 08:01 PM
Totallymetal
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The stock maxima rubber line (female) went together perfectly with the CJ (male) steel line. I had to bend the steel line around to make it work.


2007 JK Rubicon
5.5 Rock Krawler X-factor lift w/37 x 12.5 x 17 BFG KM2s, 5.13 Superior gears
Warn Powerplant HD

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post #35 of 67 Old 12-14-2009, 08:25 PM
CJman77
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Originally Posted by Totallymetal View Post
The stock maxima rubber line (female) went together perfectly with the CJ (male) steel line. I had to bend the steel line around to make it work.
TM good to hear I will buy some new stock maxima brake lines. Out of curiosity how were you going to do your hydroboost?
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post #36 of 67 Old 12-14-2009, 09:42 PM
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TM good to hear I will buy some new stock maxima brake lines. Out of curiosity how were you going to do your hydroboost?
I have the hydroboost and MC from a 1 ton Chevy. I am going to fit it, and see how it performs. I will be replacing all of the 30 yr old brake lines at the same time.


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post #37 of 67 Old 12-15-2009, 12:30 AM
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I was thinking about a hydroboost from an Astro van, There are plenty of those in the pic and pull not sure what years they are. It finally stopped raining here, so I can get out and grab the parts for my rear disc brakes. Is there any diff in the calipers between the Maxima or the Z car, or is the diff in the mtg bkt. luckily I have spare mdl 20 that I can mock up everything.
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post #38 of 67 Old 12-15-2009, 06:59 AM
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Drafters do it in excruciating detail. I found a PDF in one of the link showing the caliper mounting plate details but found it would be a nightmare for a layman to try to layout and cut. So for anyone who is interested, I can hook you up with both a print copy and a DXF file for use with CNC Laser, CNC Plasma or CNC Router. I Could probably also supply a plywood buck for those who are in the building phase and need templates.
When I upgraded my 76 CJ7 rear AMC 20 to disk brakes I pulled the stub axles out of the donor 300zx and cut the caliper brackets off and used them on the AMC 20. Fit very nicely and I used three bolts to bolt up the the axle flange. Had to use a few spacers to center the caliper onto the Suzuki Samari rotor. I found it cheaper to buy the rotors new than to buy used ones at the junkyard. They were cheap. The rear CJ emergency brake cables also worked, as I used the mounting block on the end of my emergency brake cables to mount the cables and attach them to the caliper. Later model CJ's did not have this mounting plate on the end of the emergency cable.

I should have made a template for others at the time of the caliper mounting brackets I cut off the 300zx stub axles, that would have been a good idea. I did trace them onto a cardboard box in the shop. Maybe I can make something out of that tracing if anybody is interested.

Jim
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post #39 of 67 Old 12-15-2009, 07:33 AM
Totallymetal
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I was thinking about a hydroboost from an Astro van, There are plenty of those in the pic and pull not sure what years they are.
Lots of people using the Astro van. Looks like a good choice.

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Is there any diff in the calipers between the Maxima or the Z car, or is the diff in the mtg bkt. luckily I have spare mdl 20 that I can mock up everything.
I don't know, they very well could be the same calipers.


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post #40 of 67 Old 12-15-2009, 07:35 AM
Totallymetal
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This is a good template in PDF.

CJ-adapter


2007 JK Rubicon
5.5 Rock Krawler X-factor lift w/37 x 12.5 x 17 BFG KM2s, 5.13 Superior gears
Warn Powerplant HD

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post #41 of 67 Old 12-15-2009, 07:38 AM
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Lots of people using the Astro van. Looks like a good choice.



I don't know, they very well could be the same calipers.
How do you adapt the astro van hydroboost to work on the jeep firewall?
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post #42 of 67 Old 12-15-2009, 07:43 AM
Totallymetal
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How do you adapt the astro van hydroboost to work on the jeep firewall?
I haven't done it. I would assume there are probably modifications to the mounting bracket and push rod coming from the brake pedal.

Keep in mind these are modifications to your brake system. Very dangerous if not done correctly.


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post #43 of 67 Old 12-15-2009, 04:51 PM
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I haven't done it. I would assume there are probably modifications to the mounting bracket and push rod coming from the brake pedal.

Keep in mind these are modifications to your brake system. Very dangerous if not done correctly.
Yeah....Why a 1 ton trucks hydroboost on a little Jeep cj? Wouldnt a vaccum be enough?
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post #44 of 67 Old 12-15-2009, 08:04 PM
Totallymetal
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Yeah....Why a 1 ton trucks hydroboost on a little Jeep cj? Wouldnt a vaccum be enough?
Vacuum would probably be plenty, but I figured with 35s and maybe larger in the future (after 1 ton axles), why not. I got the set up for next to nothng. If it's too much, I will sell it and go vacuum.


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post #45 of 67 Old 12-15-2009, 08:20 PM
CJman77
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Originally Posted by Totallymetal View Post
Vacuum would probably be plenty, but I figured with 35s and maybe larger in the future (after 1 ton axles), why not. I got the set up for next to nothng. If it's too much, I will sell it and go vacuum.
Yeah I hear ya.. I am thinking I may go vaccum I had my eye on the one that morris 4x4 sells.


Power Brake Unit w/ 8" Dual Diaphragm*MBM-PBUJ7486 by the Jeep Specialists | Morris 4x4 Center

Hmm 1 ton axles, too bad your not closer I have a Dana 60 front and 14 bolt rear I need to unload!
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