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Caddilac XTS 14" Brembo brakes on a Mustang.

  • Thread starter Thread starter Mustang5L5
  • Start date Start date Sep 20, 2019
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Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Sep 20, 2019
#1
  • Sep 20, 2019
  • #1
Just messing around with this setup, no intention of running it, but pretty impressed how it fits together. Not strictly 100% bolt on though..but can be.

Cobra 13" rotor on the right.



They are Junkyard Caddy XTS Brembos, and GT500 14" rotors. I paid $90 for the paid of brembos from a recycler, and $70 a rotor. Grand total $230.

However, they need some modification, Approx 0.075" needs to be machined off the mounting flange of the caliper, and the caliper mount inserts need to be removed and replaced with modified machined inserts with a 1mm offset. Basically...you need some machining skills and equipment to do this swap. After that....100% bolt on

But...I don't have wheels big enough to clear these, so this is the end of the road. just a fun experiement.
 
Reactions: 02 281 GT and General karthief

KRUISR

10 Year Member
Apr 16, 2015
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Jun 17, 2021
#2
  • Jun 17, 2021
  • #2
Well it's happening....

Here is my mock up with rim.



18x9 Saleen Reps, 14" x 1.26" Shelby rotors, XTS calipers. Needed to shave about 0.075 off the caliper mount flanges (as Mustang5L5 said), made a set of inserts with 1mm/3mm offset hole like he has made. I get 0.030/0.036 side to side clearance between rotor and caliper. Everything spins smooth with no contact.

I also cut a little more material to allow calipers lower on rotor.


I clearanced into the caliper to the blue marks...
 
Last edited: Jun 17, 2021
Reactions: stanglx2002

KRUISR

10 Year Member
Apr 16, 2015
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Jun 17, 2021
#3
  • Jun 17, 2021
  • #3


Wheels are 18x9 with 24mm offset. No spacers required.
 
Reactions: stanglx2002 and Mustang5L5

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Jun 17, 2021
#4
  • Jun 17, 2021
  • #4
Photos don't do that setup justice. It's a massive brake/rotor combo.
 

KRUISR

10 Year Member
Apr 16, 2015
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Jun 17, 2021
#5
  • Jun 17, 2021
  • #5
For comparison...



13.23" rotor with Cobra caliper vs 14" and XTS Brembo. Same wheel.
 
Reactions: DudeStang and stanglx2002

stanglx2002

CT Material here
15 Year Member
Jul 7, 2005
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Jun 17, 2021
#6
  • Jun 17, 2021
  • #6
Looking forward to seeing this completed, since I have been thinking of changing the calipers out for these over the custom 05-09 Mustang GT ones I have now on the 14" rotor.
 

KRUISR

10 Year Member
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Jun 17, 2021
#7
  • Jun 17, 2021
  • #7

Pads just barely stick up above rotor.



And as I said above, I have 0.030 and 0.036 clearance between rotor and caliper.

 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Jun 17, 2021
#8
  • Jun 17, 2021
  • #8
The XTS caliper and 14” rotor almost fits better than the ATS/13” setup
 

KRUISR

10 Year Member
Apr 16, 2015
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Jun 17, 2021
#9
  • Jun 17, 2021
  • #9
View: https://youtu.be/MGleMy_D9j8


Rotor clearance
 

Steel1

Mustang Master
Aug 18, 2017
1,419
639
143
Connecticut
Jun 18, 2021
#10
  • Jun 18, 2021
  • #10
Nice !
What booster / mc set-up do you need with that combo ?
 

KRUISR

10 Year Member
Apr 16, 2015
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Jun 18, 2021
#11
  • Jun 18, 2021
  • #11
My current caliper setup is Lincoln LS calipers all around. That's dual piston (40/38) in front and 43 in the rear. I am using a '95 booster and MC and prop valve from a '00 non ABS car - I believe it is 1.0625" bore. My plan is to keep the Lincoln rears and keep MC/booster as I already have installed.
 
Last edited: Jun 18, 2021
Reactions: Steel1

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Jun 18, 2021
#12
  • Jun 18, 2021
  • #12
Steel1 said:
Nice !
What booster / mc set-up do you need with that combo ?
Click to expand...

When i was going to install the ATS setup (same front caliper piston sizes) i was going to use the 94-95 GT 1 1/16" MC with the taurus 43mm rear calipers
 
Reactions: Steel1

stanglx2002

CT Material here
15 Year Member
Jul 7, 2005
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Jun 18, 2021
#13
  • Jun 18, 2021
  • #13
Any pictures of the insert or details of making it?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Jun 18, 2021
#14
  • Jun 18, 2021
  • #14
I have the machine prints somewhere on here in a thread. I’ll have to search when back on a computer
 

KRUISR

10 Year Member
Apr 16, 2015
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Jun 18, 2021
#15
  • Jun 18, 2021
  • #15
I used Mustang5L5's prints as reference and crudely turned out some. I used an old 1" shaft (out of the scrap bin at work) and turned it down to the 0.793" diameter in the prints.

I also elongated the holes in the caliper mount to better allow moving caliper closer to hub center.

 

95BlueStallion

My assy trans to myself
15 Year Member
Feb 22, 2007
5,126
3,091
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Cedar Rapids, Iowa
Jun 18, 2021
#16
  • Jun 18, 2021
  • #16
You guys are making me want to pay you to set this up and ship it to me. I don’t have the machines to do the work, but a big brake upgrade on my list of next mods. I still have rear drums, and wanted to build a full on kit.
 
Last edited: Jun 18, 2021
Reactions: Noobz347

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Jun 18, 2021
#17
  • Jun 18, 2021
  • #17
There’s a guy who sells them already done. Same dimensions as what I modeled up. Even comes with a rotor spacer if you don’t want to mill the caliper. It’s meant for the ATS brake setup, but the inserts will work on the XTS setup too. Unsure the dimensions on the rotor spacer though

S&S engineering on FB
 
Reactions: 95BlueStallion

KRUISR

10 Year Member
Apr 16, 2015
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929
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Jun 18, 2021
#18
  • Jun 18, 2021
  • #18
Based on my mock up, I shaved the 0.075 (or approximately) off the caliper, added the inserts and that's it. No other spacers under rotor or under wheel.

To shave the material off the caliper, I used an angle grinder with a stripping disc and a digital caliper to check my progress. I also repeatedly test fit on spindle and rotor to balance the side to side spacing between caliper and rotor.
 
S

StrokedBird

Member
Jun 19, 2021
17
12
13
SPOKANE
Jun 20, 2021
#19
  • Jun 20, 2021
  • #19
So what year model XTS did you use for the calipers? I'm very interested in doing this swap.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Jun 20, 2021
#20
  • Jun 20, 2021
  • #20
2013-2019 XTS base model (non-V) have the brembos that work with the 14” rotor

2013-2019 ATS have a similar brembo (same piston size and same exact pads) that use the 13” rotor.
 
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