4.6L General DiscussionThis section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.
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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
After they got glass-blasted
And almost ready to install (just need to remove the paint on the word Cobra)
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2007 Roushcharged GT Convertible
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 (500°F vs. 445°F), 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 518°F.
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.
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...
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?
Owned 32 Mustangs & Counting.
Fondest memories: 1969 428CJ, it was stolen 60 days after complete rebuild.....
Worst memory: 1965 Notch back, rolled end over end, 2 days after rebuild, fractured Strut-bar..... Lesson learned: ALWAYS upgrade the front suspension of an early Mustang!
Worst mustang: 1974 4-cyl auto (it was cheap, I was broke...).
Favorite body style 1965/66 Fastback.
Present stable: 1997 SVT Cobra, 50k miles, Paciffic Green w/ tan leather & lots of goodies.
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