ATS Brembos on SN95 spindles - no spindle mod

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vrt03cobra

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So who's selling the inserts ? I purchased my ATS calipers about 6 months ago and they've been sitting on my toolbox because I wasn't sure if I wanted to drill out my spindles.
 

Mustang5L5

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Not Much to report. Modeled up some new inserts...not much time to machine a pair.

My new pair will relocate the Caliper down a tad...which leads to a new concern. If I move the Caliper down the pads are close to this valley in the rotor. These are factory 99-04 Cobra rotors. The rotors I have on my fox have a ridge here, the pad would be very close

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Found some other pads that may fit. I mostly wanted to test fit to see if they also were shorter on the top. But no difference there. D810 pads from the viper and a few other vehicles. Got these on closeout for $6 just for test fitting.

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Same shape, but shorter

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However, clamping force from the pistons won’t exactly be even given how close the pistons are to the edge

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Eh, was worth looking into I guess
 

Mustang5L5

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I've tested brembo brand rotors, stop tech, and Motorcraft all fit fine

Are you trimming the pads at all?

The pad is physically wider than my OE cobra rotors front face. If I relocate the Caliper down to avoid trimming the pad on top, the bottom of the pad hangs in the breeze. I don’t think trimming can be avoided.

This is with pad material even with top of rotor. Bottom of pad is hanging in the breeze.

1C93BF62-0DFE-45A1-8FB7-D27D4BE70FD0.jpeg
 

Mustang5L5

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Looks like a different casting then. I don’t plan to use these rotors but something that should be noted.

The rotors on my car are similar to the ones in your photo.
 

Mustang5L5

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Looks like that face on my OEM rotor is 2.2” in height before that “valley” on the rotor and on the backside. I measured the aftermarket rotors on my car and get just over 2.3”.

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The pad material on the ATS brembo are 2.4” in height.

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I’ll have to wait to see how the pads sit once I machine my spacers. Right now the hating factor is the calipers don’t clear the 98 cobra wheels I want to run. Need to solve that issue first.

If I end up trimming 0.1” off the top and bottom of the pad...not the end of the world
 

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lowranger96

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The cobra r brembo kit pads. Looks like the ATS will offer more clamp then these and still be superior. My kit put the pad just proud of the outside edge of the rotor as seen in my previous pictures. Up to the user whether they see fit to grind that little bit off or not I suppose
 

pyro1998

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I would be interested in this kit
That’s correct. Zinc coated steel inserts. Also includes new 5mm longer caliper bolts as my inserts have extra thickness on the back for some additional thread engagement. Only thing required like you said was the minimal grinding that can be done with a dremel or die grinder/carbide.

$175 shipped is the kit price.


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Mustang5L5

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So, long story short, I found a pair of Caddilac XTS Brembo's on Ebay for cheap. Bought them for $90 a pair. Upon examining them, I discovered they are very similar to the ATS Brembo. The ATS worked on a 12.6" rotor and here we are using it on a 13" rotor. The XTS brembo is the same as the Vette Z51 and Camaro SS brembo used with a 13.6" Rotor. So I got an idea to try a GT500 14" rotor. Paid about $70 for one rotor.

This rotor is massive! 14" in diameter and around 1.25" thick. I'll have to get a weight comparison between the two.
IMG_6319.JPG


It appears Ford copied the 99-04 Cobra rotor casting and just enlarged it to 14" and made it thicker. The hub and important mounting dimensions are exactly the same. SN95 hub slips on nice and tight
IMG_6320.JPG
 
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Mustang5L5

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I had a feeling the mods needed to mount these were exactly the same at the ATS brembos. Since these XTS brembos weren't milled down the required 0.075" like the ATS brembos, I used the spacer I had laser cut and placed it between the rotor and the hub.

I then used my modified inserts I made for the ATS brembos. I pressed them into the XTS brembos and they bolted right up. My inserts only feature the 1mm offset. They don't lower the caliper down.

As you can see, the rotor centers beautifully. SO if you didn't want to run a rotor spacer, looks like 0.075" is roughly the magic number....at least on this spindle. No idea how badly production variances differ on a spindle designed for a floating caliper.
IMG_6323.JPG


Hard to see in this pic, but the rotor centers perfectly in the housing, and the pads are an equal distance off the rotor. Even though it's a 1.25" rotor, there's still about a 1/4" gap between pad and rotor with the pistons fully retracted.
 
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