@Talleywacker what's the name of the FB group?
Installing ATS Brembos on the Cobra.
- Thread starter GodStang
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https://www.apcautotech.com/getmedi...C_Technical_Whitepaper_D2-MONOBLOC_8-2018.pdf
Here is a good read on caliper strength/flex. This is the absolute ONLY thing I cannot find is the aluminum structure of the caliper. It could be worth sending say a stoptech caliper and a ATS caliper to a metallurgy testing facility and they could come back with the exact makeup and still this wouldn't provide any exact flexing data for at temperature use. I look at the caliper and you need piston area and strength of the caliper. In that article it mentions a well designed 4 piston will have less caliper flex than a well designed 6 piston. There is way more to the technical side that I simply just don't have any data to support if the ATS/XTS would truly be a performance application upgrade or cosmetic at best.
For the record... I know guys who road race with the PBR calipers using hawk DTC pads with good success but they are lighter 3klb gutted race cars.
For anyone who puts brembos on their car with a street pad..... they don't need brembos either.... 1000% cosmetic. Pretty sad that my pads alone cost more than these brembo calipers. Max out the current brake system with the proper pad and then upgrade brake system with the new proper pad.
Here is a good read on caliper strength/flex. This is the absolute ONLY thing I cannot find is the aluminum structure of the caliper. It could be worth sending say a stoptech caliper and a ATS caliper to a metallurgy testing facility and they could come back with the exact makeup and still this wouldn't provide any exact flexing data for at temperature use. I look at the caliper and you need piston area and strength of the caliper. In that article it mentions a well designed 4 piston will have less caliper flex than a well designed 6 piston. There is way more to the technical side that I simply just don't have any data to support if the ATS/XTS would truly be a performance application upgrade or cosmetic at best.
For the record... I know guys who road race with the PBR calipers using hawk DTC pads with good success but they are lighter 3klb gutted race cars.
For anyone who puts brembos on their car with a street pad..... they don't need brembos either.... 1000% cosmetic. Pretty sad that my pads alone cost more than these brembo calipers. Max out the current brake system with the proper pad and then upgrade brake system with the new proper pad.
Hi. I’m Clem palacios from the FB group that installed XTS with gt500 rotors. It’s correct that Chris salmon kit work with XTS and gt500 rotors. we installed this on a buddies car when he received XTS instead of ATS calipers from an eBay seller. This will require 18 wheels. Minor clearance for with a file is need on back of caliper. A 5 minute job.
So far everything is great. I am doing my own ATS to XTS swap this weekend. I prefer the look of the XTS gt500 combo. Nothing wrong at all with my ATS brake.
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Here is some other data I found interesting. Using a calibration PDF estimator I was able to determine the pad size of the 00 cobra R to be 8.229 square inches and the pad size of the CTS was 11.422 square inches. That is a noticeable increase in pad size which will only help wear and heat spread on the pad itself.
The ST40 pad has 9.53 square inches of pad size. The ST40 is forged, 4 piston and is designed for racing and claims is the stiffest caliper on the market. . My uncle always told me the fastest guys who raced with had stoptech which is why he went with the stoptech setup.
The ST40 pad has 9.53 square inches of pad size. The ST40 is forged, 4 piston and is designed for racing and claims is the stiffest caliper on the market. . My uncle always told me the fastest guys who raced with had stoptech which is why he went with the stoptech setup.
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Awesome! Howdy you doing lol.
Now... do me a favor.... get some raybestos ST43 or ST47 pads and can you do like 10 stops from 150mph down to 45mph as hard as you can and let me know how they do
Talleywhacker, what do you think of OEM brembo pads? The XTS calipers actually came brand new loaded with pads.
but yo your point I agree a good pad is needed if not it’s purely cosmetic.
but yo your point I agree a good pad is needed if not it’s purely cosmetic.
I don't have any experience with the brembo pads. I've only driven my car 400 miles on the street and I couldn't even tell you what pads they are... it was a set of street pads given to me when I bought the car.
I can tell you that I run raybestos ST43 pads up front and hawk blue pads in the rear on racing. They destroy my street tires... I have a hard time braking because these brakes/pads are designed for race tires not street tires. I'm a novice so the event organizers mandate novice use street tires... it helps them learn.
I used to have one of those KB street cages in my old 97 GT. Why are you looking to install it?
I had a big thick piece of padding on the crossbar, and a finished piece over that. Got rearended when stopped at a street light with my seat belt on. I slid right up the seat and cracked my head wide open. Had to go get looked at, at the local Hospital.
I’ve had it in previous cars and love the look. Sorry bout your noggin.
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I've got the KB street cage. It's ok but I think I would prefer a full cage. Oh ya when you have a cage you should also have a 5/6 pt harness and wear a helmet.... otherwise it's not safe. I have the harnesses so I won't be riding up. Luckly the KB street cage is pretty far back and I have corbeau seats so there shouldn't be any chance of me sliding up at all
I think it's going to vary based on caliper.
I knocked the inserts out on 4 calipers. So a total of 16 inserts. I held the caliper in one hand, insert a bolt into the insert from the opposite side, and gave it 3-4 whacks with a set of lineman's pliers. They all came right out very easily.
They would increase rear brake bias. The stock Cobra front brake setup with 38mm rear calipers is already at an ideal 70/30 split. The 43mm caliper upgrade is meant for those upgrading the front brakes beyond standard cobra brakes.
Brake dive can be caused/cured by the shocks/struts. Usually there is valving in the shock/strut to prevent the quick transition that causes brake dive. You may want to look into new shocks/struts for the cure.
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That thought did cross my mind. I saw the claim "Lightweight and drag" for the ATS's brakes on a few publications, but wondered how much of that was marketing-speak (because fuel efficiency is in demand) vs design intent.
The ATS Brembo and Cobra R brembo are pretty similar. The ATS uses bigger pistons, but the body is similar. The pads are also very similar in shape. I don't have both in hand to compare, but i have had the chance to check out a 2000 R brembo in person and the designs are close.
So with that logic, i would assume performance should be able the same?
One "upgrade" to consider with the ATS brembo is the ability to run a 1.25" thick rotor. I've seen guys run the C6 style Baer caliper with 1.25" Baer 2-peice rotors. I also run the C6 style baer caliper (actually off a Pontiac GTO) on my car, and did experiment with some cut down GT500 rotors trimmed to 13.1 inches. The floating caliper fit perfectly, and it was great to have such a massive thick rotor. With the ATS brembos, running such a rotor might require tweaks to the caliper offset since a fix caliper cannot be adjusted for slight differences in rotor offset like a floating caliper can.
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The pics of the GT500/XTS brembo setup mounted look great. I know when i initially set that up on my bench it was such an massive looking brake setup that i didn't know if it was practical. Then i discovered the 43mm Taurus caliper. I wonder what brake bias would be like with the 14" XTS setup, and the Baer 13.25" rear rotor with 43mm Taurus caliper? Only downside to that setup would be that the rear rotor is solid, vs vented.
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What is the brake pedal feel to a 43mm Taurus caliper + Brembo-4 Pot setup? Can anyone elaborate on the experience? I want to pair it with Baer eradispeed +1 rotor. I’ve seen the exterior cosmetic look which is amazing but I’m wondering about the performance...
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Is anyone using speed bleeders on the ATS calipers? If so, what brand and part number?
I agree with your comments. I know my biasing is off with my setup. Stock brake lines stock master cylinder and the stoptech 13” st40 front kit and the MM 12.7” wilwood 4 piston rear floating kit. MM told me I can put more rear biasing on the car since the rear can handle much more abuse now. They recommended a bias valve so I can dial it in but implied I would be closer to 60/40 or 55/45 which would help reduce the front brake temps under road racing
It actually looks a LOT bigger in person than the pictures can convey. It makes the factory Cobra brakes seem puny.
Clem, Can you post a picture of the "shaving" you had to do on the rear of the XTS caliper? or is it self explanatory when you go to mount them up?
Hi Nate, I didn’t take a photo of the area that needs to be filed. However it’s pretty clear where it needs to be filed once you mock it up. Easily done with with a file.
So does anyone know of pads that fit without grinding down pad material? I'm trying to make the install easier for pad swaps after track days.
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