Installing ATS Brembos on the Cobra.

Mustang5L5 · Jun 4, 2020

Measured an OEM ATS pad. I got 2.385" as a thickness of the pad swept material in the center of the arch.

Pad dimensions match this
https://www.rallitek.com/14835-thic...rake-pads-sti-evo-oem-brembo-applications.jpg

And here's Brembo's own internal spec doc that states that pad protrustion past the rotor be limited to 0.3mm max. That's not much
https://www.brembo.com/de/Varie/Brembo_RacingAutoCatalogue.pdf

Here's where they sit with an OEM 13" rotor. These are the inserts i machined up myself, but i believe the are the same offset as lowranger's. They may not be, so don't judge his setup based on my pic. Hard to actually judge how far it protrudes as the angle may be a bit misleading, but it's not much.

BD2A5969-8D80-4629-A98A-5955ADC81ECE.jpeg.jpg

This photo was with the first set of inserts I made which did not offset the caliper any. As you can see, quite a bit overhangs here

CBA61448-4ED9-46BE-9500-F90F377AD1F4.jpeg.jpg

lowranger96 · Jun 4, 2020

Mustang5L5 said:
Measured an OEM ATS pad. I got 2.385" as a thickness of the pad swept material in the center of the arch.

Pad dimensions match this
https://www.rallitek.com/14835-thic...rake-pads-sti-evo-oem-brembo-applications.jpg

And here's Brembo's own internal spec doc that states that pad protrustion past the rotor be limited to 0.3mm max. That's not much
https://www.brembo.com/de/Varie/Brembo_RacingAutoCatalogue.pdf

Here's where they sit with an OEM 13" rotor. These are the inserts i machined up myself, but i believe the are the same offset as lowranger's. They may not be, so don't judge his setup based on my pic. Hard to actually judge how far it protrudes as the angle may be a bit misleading, but it's not much.

View attachment 1644455

This photo was with the first set of inserts I made which did not offset the caliper any. As you can see, quite a bit overhangs here
View attachment 1644458

All of my inserts move the caliper down onto the rotor by 3mm, which I believe is the same as yours

Mustang5L5 · Jun 5, 2020

ok, then I machined mine the same way with the same offset

SilverGT1 · Jun 6, 2020

Pulled it apart.
Pads: 2.386"
Rotors: 13"
See pictures for adapter orientation:

Pad Measurement:

The caliper bolts are resting as far down as possible. I do not see any other interference.

Thoughts??

lowranger96 · Jun 6, 2020

Installation looks correct. To me I feel like the unused pad will eventually fall off but if you hate the overhang trimming the pads would be the fix

SilverGT1 · Jun 6, 2020

It just seems odd. I wonder if it is a difference in the Brembo manufacturing location? Mine are made in Mexico. I think Mustang5L5 is showing Czech Republic? Or maybe it is my spindles? I think I took them off of a 2001. But that shouldn’t matter. 96-04 are the same?? There has to be a reason there is that much variance.

lowranger96 · Jun 6, 2020

I was thinking the same, were yours oem or eBay? Seems like a 1-2mm difference I’d say. My car is on the lift I’ll measure mine to see what it is. I have a set of Brembo rotors too I wonder if they are larger?

lowranger96 · Jun 6, 2020

lowranger96 · Jun 6, 2020

I’ll get back to you on my thoughts wife is yelling at me for dinner

SilverGT1 · Jun 6, 2020

I ordered mine from Scoggin Dickey:
Item: ACDelco GM Original Equipment Front Passenger Side Disc Brake
Caliper Assembly 172-2768 (172-2768)

Item: ACDelco GM Original Equipment Front Driver Side Disc Brake
Caliper Assembly 172-2777 (172-2777)

There has to me a smoking gun here somewhere...

SilverGT1 · Jun 6, 2020

are those pads trimmed? There is .091 between yours and mine. Also, Mustang5L5 has a measurement very similar to mine and his sits lower like yours.

lowranger96 · Jun 6, 2020

Measure the holes that the pad pins through through to the top of your material material. Maybe the pad material isn’t sitting at the same overall height as others compared to the holes that actually hold the pads in place

lowranger96 · Jun 6, 2020

SilverGT1 said:
are those pads trimmed? There is .091 between yours and mine. Also, Mustang5L5 has a measurement very similar to mine and his sits lower like yours.

No straight out of the box, they are from rockauto

SilverGT1 · Jun 6, 2020

Here is what I am getting:

lowranger96 · Jun 6, 2020

Just from the pictures i can tell on my pads the material is lower compared to yours, I’ll measure mine too in a few

I’m running Wagner ZX1050, granted probably not the best super duper performance pad but it’s what I bought when I was studying this setup as they were only $20. Seems maybe there is a wide tolerance in the pads which I’m sure is no issue in the oem application but for us it could be the difference between your overhang, mine, and others

SilverGT1 · Jun 6, 2020

I think that I may have this figured out. I have Power Stop Z26-1001 pads are for a larger rotor. I think the Wagner pads you ordered are for a standard rotor.
It's kind of messed up. there are parts that say specifically, "for Brembo" then there are "heavy duty" and then "Base". It looks like they are all interchangeable-ish. I just was playing around with the part selector on Summit. I'll have to buy a couple and see what is really different between these.

lowranger96 · Jun 6, 2020

Maybe the xts pads are different and that is what you have?

SilverGT1 · Jun 6, 2020

The Z26-1001 are for the 2013 ATS with Brembo calipers.

lowranger96 · Jun 6, 2020

Ahh okay. Well odd, very odd

Blkkbgt · Jun 8, 2020

Mustang5L5 said:
Has anyone split their Brembos apart for paint/powdercoat?

IIRC, Brembo has stated to not split the calipers as the bolts that hold them together are one-time use only and not obtainable outside of Brembo. However, I've seen plenty of threads where guys disassembly them completely and paint/powdercoat them.

I've been thinking about this for a while.

First off I'd be amazed if the bolts are a true one time use item. However if Brembo is making this claim they must be a TTY faster and/or they are making considerations for heat cycling.

If you can find it in a service manual where they are indeed one time use then I'd junk them instead of taking the chance. This would also tell me that you should be able to order them from either Brembo or GM.

If for some reason you cannot get them I'd honestly replace them with 12.9 bolts and use a generic torque spec at the high end with thread locker.

Just my .02.

Installing ATS Brembos on the Cobra.

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