ATS Brembos on SN95 spindles - no spindle mod

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Mustang5L5

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Just finished my second set of offset inserts. For a refresher, these have the m12 hole drilled 1mm offset to the outside, and 3mm up (dropping the caliper 3mm closer to hub)

Horizontal line is for reverence to the install plane. There is a left, and right insert

B2C720EA-8B85-438F-9A25-BF91401618AC.jpeg


The cautious side of me does worry about the offset threaded hole being too close to the outside edge. If you think about the loads on the bolts going through the inserts and how the caliper tries to react, the leading insert may have some force going through the thinner area. Most of the force will be horizontal but the trailing end of the caliper will try to pivot up, and the leading end pivot downwards slightly. At least that's my though.


I’m going to try these in an XTS Caliper and see if 3mm down works with the 14” rotor. Unfortunately I left an XTS Caliper as home so I couldn’t machine the clearance for it on the Caliper. Will do on my next lunch break as that takes 5 min.

My hope is 3mm is the right number although 2mm would prob get a little more meat around the bolt which might be more ideal with the 14" rotor's torque. The rotor/Caliper clearance was tighter on the XTS/14” rotor vs the ATS/13” rotor. You may not even need to shave pads if it fits up.

Once I test fit these inserts, and confirm that 0.075" spacer, or machining the mounting face works, I plan on stopping my trials with the 14"/XTS setup and returning the rotor to get my $70 back. I likely will not be making another set of inserts as it takes up way too much of my free time. I've already made 8 of them. At that point, someone else will need to run with this project.
 
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Blkkbgt

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@Mustang5L5 The thickness of the inserts is big concern of mine at this point. The thickness of the cap should help hold the Tq applied to the hardware as well as the fact that the insert is lightly pressed into a hole. The body of the caliper mount ear should also give the insert something to brace against. If I continue down this road I'll probably run them for 6 months and take the calipers off to inspect them. I wonder if it would have been a better idea to not offset them so much and instead trim the pads?
 

Mustang5L5

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PRoblem is without the 3mm offset downward, it won’t clear 17” wheels...or at least the 3 types I tried. Right now I have maybe 1mm of clearance.

My first trial had 0 vertical offset. Would have needed to just trim pads and run 18” wheels.

I agree about the extra support of the aluminum mounting ear, but my car is also a street cruiser and never gets beat on. Hate for someone who is road racing to stress them and have a failure.

Perhaps a 2mm or 1mm verticals offset would be more ideal in cases of severe duty.

I went 3...I’ll likely try it and inspect later.
 

Mustang5L5

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Here’s the last update on the XTS/14” rotor setup.

I pressed in my inserts. These locate the Caliper 3mm downward. Some final notes, and that’s it. Rotor is in my trunk ready to return it for beer money.

5F6AD31A-A423-4DD8-8E9B-ABBEE739AD8D.jpeg


Pulling the Caliper down does locate it closer to the spindle. I ran into this with the ATS calipers requiring me to machine into the higher cast region aboit 0.1” for clearance in areas I marked. See above on the XTS Caliper


I did not machine the flange, but instead used a 0.075” spacer under the rotor to simulate machining. I had contact on the front face of the rotor. With the 1.25” thick rotor, this offset is less forgiving. I think I might start with machining (or a spacer) of 0.070” thick and try that.

5DE52833-59E9-435A-A3F2-91BD02FEF369.jpeg
 

Mustang5L5

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Bottom of pads...plenty of clearance.

6468DF04-CB41-496C-85D7-26AE728DBC4E.jpeg

CE889574-74B1-4043-9B0F-6E15B856765C.jpeg


Top of pad? There is some overhang, but not much. You have to take off 2-3mm or so.
 

Mustang5L5

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On the backside, rotor is close to the inserts. My flange is 4mm thick. As you can see, not much more room before contact. Keep in mind that a 0.070” spacer would locate the rotor closer. I’d prob go 5mm here. I couldn’t measure.

A7BD6FDD-8831-4E4A-9309-E81488CF9F27.jpeg
 

Mustang5L5

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Distance from hub to outside edge of Caliper around 8”. So 16” wide barrel needed. Hard to measure so consider this untested

8D939B72-3E56-456B-8086-0EE72C253F2B.jpeg
 

Mustang5L5

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And as you can see here, diameter-wide the gt500 14” rotor has plenty of clearance.

What’s tight is the narrowest part of the rotor channel. The rotor is 1.25” and the channel is 1.335” wide. That only gives you about 0.040” clearance on each side. Measure twice here before you make any permanent changes

DDC0AAFF-5C35-44E6-8624-B6E1118E4EB1.jpeg
 

Mustang5L5

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And that’s it. I can’t go any further as I can’t mount those on my car anyway. Hopefully someone can take what I’ve done and continue on with this.

I’m wrapping up my other ATS brembo and shelving them while I do a nice 302 motor for my fox.
 

SVTPaul

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Wow things are pretty tight without much forgiveness with the XTS caliper / 14" GT500 rotor! I measured the barrel of my 18" SP500's and have 16.5" inner diameter. I have a new appreciation for the size of those calipers now as these wheels are designed to clear big brake kits and the XTS calipers would fill them.
 

Mustang5L5

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It’s tight, but I still think it’s doable. These calipers are huge compared to the ATS stuff and those rotors are physically massive

Haven’t sat down to figure out brake bias with them. Imagine it might be a tad front biased

But anyway, if someone takes my info and goes further than I did...please let me know the outcome. I prob will sell off my XTS calipers as well if anyone wants them.
 
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SVTPaul

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It’s tight, but I still think it’s doable. These calipers are huge compared to the ATS stuff and those rotors are physically massive

Haven’t sat down to figure out brake bias with them. Imagine it might be a tad front biased

But anyway, if someone takes my info and goes further than I did...please let me know the outcome. I prob will sell off my XTS calipers as well if anyone wants them.

If I knew everything would bolt up onto my 04 Cobra, I'd consider buying what you have. I'm no machinist and don't have any affiliation with a decent shop. Again, appreciate the work you've done here!
 

pyro1998

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That's it for now. Only so far I can take this project. My car is a Fox body, and I run 17" wheels. I fear if I stuck these 14" Brembos on my car, it would either lock the fronts up with moderate braking way too easily, or do a cartwheel. I also have no intention of going to 18's.

But I don't mind messing around a bit more with this. I'm in the middle of machining my revised inserts for the ATS brembos to lower the caliper down slightly, but I can try those in this XTS caliper to see what the magic number is to drop it down and potentially not need to shave the pads. I also don't know if these will clear 18's.

I'd really like to see someone take this all the way and get it functional on a car. Really not much different than the ATS brembo swap

But, I paid $90 for the calipers, and $70 for one rotor. So $230 for the brakes/rotors. I would likely mill the calipers down the 0.075" so really it's just the cost of my time for machining the inserts.

At this time I am not making them. I've been doing these by hand....not on a CNC. You guys wouldn't want to pay what I would charge.
I'm in the process of getting the parts to try this, I putting it on an 02 gt with 18" rims, here is the first caliper that got delivered, I'll keep you posted on the fitment
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Sent from my SM-G950U using the svtperformance.com mobile app
 

SilverGT1

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I just received my insert kit today from Lowranger96. Really nice stuff. He even created a little installation instruction sheet. Even included a drill bit for the set screw should you decide to use it. I wish there were a trader rating on here. I'd give him an A+, 5 stars, 100%...

Thanks!
 

SilverGT1

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Looking at picking up speed bleeders for the ATS. Anyone have a brand recommendation? Also, for bleeding these, there are two bleeders per caliper. Is there any specific sequence to follow? I assume far side (outside) bleed first then inside?
 

ram360

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lowranger96 sent you a pm. Definetly interested in one of your insert kits if you have them for sale.
 

Mustang5L5

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In searching for a rear brake upgrade...I discovered that 93-97 Taurus calipers direct swap over to the SN95 pad hangers. They are 43mm calipers. The original SN95 calipers are 38mm units.

79A9D8D6-1190-4996-9DCB-5C21E6725BA0.jpeg
 
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