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Brake Upgrade

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Old 04-30-2012, 08:15 AM   #1
Shampue
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Default Brake Upgrade

Starting a thread on the brake upgrade I'm doing on my 01 GT.

After lengthy discussions with Cliffy and Jazzer. I decided on installing Cobra front calipers with new rotors (of course), new lines and Hawk HPS Pads.

I was really close to keeping the GT calipers and just getting new rotors and pads as Jazzer suggested because the price of Cobra calipers is at a premium right now. Everywhere I looked, for finished or nasty condition were running $399.99 just for the calipers and brackets. But lucky me, I ran across a nice service guy who is stationed in Germany who had a set and got them for a song. So cheap mind you I considered just reselling them for $400. Obviously I decided to use them for me.

I had the calipers and brackets glass-blasted at the local machine shop, then I painted them with Duplicolor red caliper paint. I used Duplicolor black caliper paint on the brackets. In the picture below, Cobra is still red. I'm going to take a file and carefully file away the paint on the word Cobra and leave it a nice aluminum color.

Right now, the only thing I'm waffling on is the brake fluid I want to use. I'll re-read jazzers how-to on brakes to get a good baseline. But as always, suggestions are welcome.

I'll post pictures on the install when I get around to doing it. I'm planning on doing it the weekend of 5/5.

Here are some pics.

Calipers & Brackets as I received them
Click the image to open in full size.

After they got glass-blasted
Click the image to open in full size.

And almost ready to install (just need to remove the paint on the word Cobra)
Click the image to open in full size.
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Last edited by Shampue; 04-30-2012 at 08:20 AM.
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Old 04-30-2012, 08:49 AM   #2
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Looks good man i need to start worrying about my brakes too.
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Old 04-30-2012, 10:49 AM   #3
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Nice clean up job.
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Old 04-30-2012, 11:07 AM   #4
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DOT 5.1 (!!! NOT DOT 5 !!!).

DOT 5 is silicone based and should not be used on a street car as it is hydrophobic (does not absorb water). While it does have a higher boiling point than DOT 4 (500F vs. 445F), it should not be used on the street because it does not absorb water. Any condensation or water contamination can pool up in the system and cause corrosion.

Also, with the introduction of DOT 5.1, DOT 5's higher boiling point is now irrelevant--DOT 5.1 boils at 518F.

DOT 4 and earlier, and DOT 5.1, fluids are glycol based and are hygroscopic, meaning they absorb water. 5.1 is currently the best stuff for street use.

DOT 5 should not be mixed with DOT 4 or earlier, or DOT 5.1 fluids.
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Old 04-30-2012, 11:09 AM   #5
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Thanks cliff.

Also, Is it true that two different fluids will foam up?
So, I really either need to have the same fluid or do a complete flush out then add the new 5.1 fluid?
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Old 04-30-2012, 11:19 AM   #6
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Though not recommended, DOT 3 and 4, and 5.1 are fully miscible and can be mixed in any proportion. I have only seen foaming when new fluid is mixed with very old water saturated fluid that should have been flushed anyway.

I would use this as an opportunity to flush the system. Drain the fluid reservoir with a baster and fill it with 5.1, then bleed the new front brakes. Next bleed the right, then left, rears until you see clear fluid, and then for completeness/just-to-be-sure bleed the fronts again.

Be careful with those pretty new calipers, the brake fluid may dissolve the paint...
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Last edited by cliffyk; 04-30-2012 at 11:22 AM.
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Old 04-30-2012, 11:23 AM   #7
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With a total flush as you suggest, how much fluid do I need to get? 1 can? 3 cans?

The paint I used is a high temp ceramic paint for brake calipers. I'll still be careful.

My cousin is going to help me do the swap. He upgraded the brakes on his 94 Z/28 to 2002 Corvette brakes and did a stellar job. Not to mention, he has the tools I lack
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Old 04-30-2012, 11:32 AM   #8
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One quart should be plenty...
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Old 04-30-2012, 11:55 AM   #9
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Nice job on the brakes find!
That's the way to do it, glass bead & paint everything before the installation.
Will the Cobra brakes fit with your rims?
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Old 04-30-2012, 11:59 AM   #10
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They should fit. They are the stock 17" wheels
Click the image to open in full size.

Everything I read says they'll fit. I'll do a test fit before I do the complete swap, just to make sure.
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Old 04-30-2012, 02:37 PM   #11
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They'll fit on the stock bullitts 100%

You say you had a tough time finding the cobra brakes for under $400 for the calipers and brackets though? I bought brand new bullitt calipers/brackets/pads for $205 shipped from buyfordracing.com lol

A file or sand paper will remove the paint from the letters COBRA just fine. It'll look nice. I've done that before
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Old 04-30-2012, 02:43 PM   #12
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Quote:
Originally Posted by hpwrestler220 View Post
They'll fit on the stock bullitts 100%

You say you had a tough time finding the cobra brakes for under $400 for the calipers and brackets though? I bought brand new bullitt calipers/brackets/pads for $205 shipped from buyfordracing.com lol

A file or sand paper will remove the paint from the letters COBRA just fine. It'll look nice. I've done that before
Thanks for the confirmation on fitting.

Still more expensive than what I got mine for Well, excluding the pads.

I'm curious though. I looked on buyfordracing.com and didn't see them. Can you link me the listing? Also, I wouldn't mind shopping for the rears.
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Old 04-30-2012, 04:33 PM   #13
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Quote:
Originally Posted by Shampue View Post
Thanks for the confirmation on fitting.

Still more expensive than what I got mine for Well, excluding the pads.

I'm curious though. I looked on buyfordracing.com and didn't see them. Can you link me the listing? Also, I wouldn't mind shopping for the rears.
Well if you wanna compare pricing, I pieced together a full bullitt/mach1/cobra brake upgrade on all 4 corners with new pads all around and brand new front calipers for $375. Look around -- there are deals to be had.

I just searched the site and it seems that they took the front calipers off. Hmmm.

You know that bullitts and mach 1's have the same brakes as the cobras right?
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Old 04-30-2012, 04:38 PM   #14
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Quote:
Originally Posted by hpwrestler220 View Post
You know that bullitts and mach 1's have the same brakes as the cobras right?
I know they are the same size, but I specifically wanted the Cobra in raised letters on the calipers. I thought the Mach's and the Bullits were either plain or had a horse on them?

I looked daily for 4 weeks before I settled on the ones I bought from the GI Joe in Germany.

I'm not disappointed in the price I paid. I was just surprised when you said buyfordracing.com cause I was certain I checked there.

Also, the Hawk HPS pads are a little pricey. I could have dropped my overall investment if I went wither other pads.

Bought the Calipers over the internet (private seller); Pads from Discountbrakes.com; rotors/piston rebuild kits from rockauto.com and the brake lines from latemodelrestoration.com. Sure beats the stupid $1300 price tag the conversion kits sell for.

Edit: O, I think your buy for $375 is a hellova deal. All four corners? Rear cobra calipers & brackets on average are $275 right now. When did you do yours?
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Old 05-01-2012, 05:47 AM   #15
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you just need backing plates, brackets, pads and rotors for the rear. calipers are the same.
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Old 05-01-2012, 08:38 AM   #16
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Quote:
Originally Posted by Fink View Post
you just need backing plates, brackets, pads and rotors for the rear. calipers are the same.
The rear calipers are the same on a GT and a cobra/mach?

I thought they would be bigger because the diameter of the rotors is bigger aren't they?
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Old 05-01-2012, 10:53 AM   #17
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I did my rears when I had my gears installed bc the axles need to be pulled in order to get the moan braces on there. Killed 2 birds with one stone.

I ended up picking up the full rear kit for $75 used locally. Although the rotors are 11.65" as opposed to the GT's 10.5, you can use the GT caliper on the rears as long as you have the Mach/gt/cobra rear bracket (which looks cooler anyway)

As for the fronts. I meant that they are all the same visually. The cobras have raised letters (and some indented), the bullitts have a pony, and the machs have nothing. I think only the 04 cobras have larger pistons 40mm as opposed to all the others which have 38mm pistons. You wouldn't be able to feel that little of a difference anyway.
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Old 05-03-2012, 02:50 PM   #18
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Quick question.

I was under the impression that all 94-04 Cobra front calipers were the same, with minor exceptions like stamping.

The calipers I got were off a '97 Cobra. I need a Brake Hardware Kit, but this says 99-04.

Will it still fit? I have a feeling O'Reillys database isn't exactly 100% accurate
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Old 05-06-2012, 02:33 PM   #19
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Brake upgrade done!

Here are some pictures.

Click the image to open in full size.

Click the image to open in full size.

I also decided to take the back brakes apart. I wire wheeled the rotors brackets and calipers. Painted the rotors and brackets black. Assembled the brakes and painted the calipers red to match the fronts.

Rear Brakes Before:

Click the image to open in full size.

Rear Brakes After:

Click the image to open in full size.

Click the image to open in full size.
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Old 05-06-2012, 03:47 PM   #20
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Cool!!!
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Old 05-06-2012, 03:47 PM
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