67 fastback with 8.8, cobra rear disc and 15 inch magnum500

[Markus]

Hello guys,

i finished today my winter project. I installed last year a 8.8 fox rear end wit original drum brakes. This winter i convert to cobra disc brakes with the condition to proceed my 15x8 magnum 500.
And they fits
I bought a set of moser fox length axles with 3 inch press in studs, a ford racing cobra disc brake kit and a set northrace cobra brackets.
Here is the result. Please look at "converting to rear cobra brakes"

What do you think??

cobra brakes

Markus

 

[brianj5600]

Das ist sehr gut! I like the e-brake solution. Mine are not hooked up. I was thinking of making the late model rear cable work with the early front cables, but I like your idea better.

 

[MrBobMarley]

Nice write up, great detail with the pics! Your stang is freaking gorgeous....I love it!

 

[Markus]

Thank you guys,

the e brakes are not so effective like the old drum solution. I must pull the brake handle like a bull to hold the car on a hill. I drive with the new setup about 100 miles now. Maybe the effect will be better with more miles.

Markus

 

[66Runt]

Hi Markus,
Beautiful car, and great install on the rear.
Probably the e-brake will not get better with time. I found on my conversion, that I had to go through the entire system and make it work as best as possible. I made a few changes to limit the friction in the cables, and maximize the effectiveness. It works great now that I have done this.
BTW: If the brakes are hot when you set the e-brake, as the rotor cools it will shrink, and not have as much holding power, so be careful when parking on a hill.
I think there are some pictures of my conversion on the web page in the signature. I tested this system on an 8% grade with the rotors very hot, and it held even after the rotors cooled to ambient.

 

[96 DOHC Cobra]

Nice car and writeup. But did you know the dust shields are on backwards?

 

[brianj5600]

Will they even fit the other way with Fox axles? The rotors are .75" closer to the dust shields.

 

[Markus]

Will they even fit the other way with Fox axles? The rotors are .75" closer to the dust shields.

Correct, they don´t fit the stock way. They fit only reverse. Is this a problem

@66runt

thank you for the info´s about the hot/cold e-brake function. Thats good to know
I don´t like run behind my car down the hill
Maybe i install a hydraulic valve instead the brake cables. Like a line lock for the rear brakes.
BTW, your mods are made awesome.

thank you guys

Markus

 

[96 DOHC Cobra]

Correct, they don´t fit the stock way. They fit only reverse. Is this a problem:

I think for this type of application, they're supposed to be mounted behind the steel bracket. It'll probably work just fine the way it is. It just looks a little odd to me.

 

[66Runt]

The install on Markus, and my car, is as per the instructions for the North Racecar brackets. To mount them on the other side of the steel bracket would move them 1/4" further away than necessary. From about 1,500 miles of evaluation, they seem to work very well in this orientation.

Markus,
just my opinion, but I think you would do better to work with your stock mechanical e-brake linkage. Hydraulic valves have a tendency to loose pressure over time. Mine is working great. All I did was dissassemble, clean and lubricate all the cables and linkage, then worked to get a straighter pull on the cables that run to the calipers.

 

[Markus]

@RUNT66

Hello,

to clean and lubricate the cables is my work for next weekend
It´s a good idea.

thanks

 

[ultrastang]

Nice car and writeup. But did you know the dust shields are on backwards?

The placement isn't extremely critical so long as it is in place to deflect direct hits by water and road debris.

However, he's got it right. The splash shield placement is just like that of my '03 Mach 1's (same brake setup as Cobra).

Check out "Step 12" on page 7 of the Ford M-2300-M Mustang GT Rear Disk Brake Bracket Kit Installation Instructions:

http://www.fordracingparts.com/download/instructionsheets/FordInstShtM-2300-M.pdf

--and nice work, by the way.

 

[96 DOHC Cobra]

I agree the placement might not be critical. The picture in the link is of the correct factory orientation. The pictures Markus shows us have turned around.

 

[66Runt]

I just saw what 96DOHC Cobra is saying, and he is correct.
Markus, if your shields are mounted up like the pictures in row 8 and 9, they are on backwards. The picture at the end of row 6 is correct.
I'm sorry, I only looked at the picture at the end of row 6.
I would change them. The reason is to keep small gravel out from the inside of the rotor. Make both look like the picture at the end of row 6 and you will have them installed correctly.

Darned good eye Cobra! I missed the pictures on rows 8 and 9 completely.

 

[ultrastang]

I agree the placement might not be critical. The picture in the link is of the correct factory orientation. The pictures Markus shows us have turned around.

Whoops! Like Runt, I only looked as far as the first picture of the splash shield that was posted on the 6th row. My opologies. I'll shut up now. :Zip2:

 

[brianj5600]

If you look at the very last picture, the shield looks like it will contact the rotor by the caliper if they are switched. Remember, the axles are 3/4" shorter than sn95 axles. The rotors are 3/4" closer to the shields. As they are I believe they protect the rotors better that a stock sn95 with the rotors spaced over more. If they are switched, they will need some trimming to clear.

Edit: The second to last picture shows the area that will possibly grind on the rotor. The curled over edge of the shield covers the swept area of the rotor.

 

[Markus]

If you look at the very last picture, the shield looks like it will contact the rotor by the caliper if they are switched. Remember, the axles are 3/4" shorter than sn95 axles. The rotors are 3/4" closer to the shields. As they are I believe they protect the rotors better that a stock sn95 with the rotors spaced over more. If they are switched, they will need some trimming to clear.

Edit: The second to last picture shows the area that will possibly grind on the rotor. The curled over edge of the shield covers the swept area of the rotor.

Hello,

you absolutely right. I would have to trim the shields if i would like to install it the "right" way.
Here are two pictures. You can see, there is not enough space to turn the splash shields.

Markus

 

[66Runt]

For the Fox rear end install, you don't have to trim them. On mine I "tweaked" them by hand just a bit , where it sweeps across the rotors near the caliper. You really can't even tell where I did this. The rest of the shield is larger than the rotor. Man, I forgot all about doing that.
I think it's worth it to at least try. If you get gravel up in there, it could do some serious damage.

I'll see if I can't get a picture of how mine are installed. That may help visualize what needs to be done.

 

[66Runt]

Here is a picture of mine. There is a red "pencil" line I drew where I did the bending. When I showed my friend, he couldn't tell I bent them, until I showed him the line.
Sorry this picture and line aren't better. I'm photogenically challenged
Anyway, I hope this helps you.