Stock SS wheels. Best brakes?
06-16-2018, 05:54 PM
#242
I agree, that looks super close! Boosted, do you have any measurements on how close exactly they are? With the wheels and calipers being aluminum, and all of the joints in the wheel hub/braking system, I'd be worried that under heavy load you get a tiny bit of flex in something and start rubbing. I'm sure it wouldn't be the end of the world, but a little close for comfort for me.
Both the ATS / JL9 setup and the CTS-V setup have calipers with the same pistons/bore sizes, so they apply the same clamping force, but since braking torque=force*radius, those 355mm rotors should provide about 10% more braking torque than the 321mm rotors used in the ATS/JL9 setup. You just have to decide if that 10% is worth the headache of fitment to you and your application.
Both the ATS / JL9 setup and the CTS-V setup have calipers with the same pistons/bore sizes, so they apply the same clamping force, but since braking torque=force*radius, those 355mm rotors should provide about 10% more braking torque than the 321mm rotors used in the ATS/JL9 setup. You just have to decide if that 10% is worth the headache of fitment to you and your application.
as for fitment, the spoke clearance is the same as the ats calipers. The barrely clearance is maybe 1.5-2mm which is close, but again i barely took any material off. There is plenty of room for wheel weights between the caliper and spoke of wheel, and you may need to move them out further. parts are available and price compared to the base c7/ats is about the same. absolutely the biggest brakes ive seen on stock wheels. I am happy with the upgrade and excited to hit the track by the end of summer.
Cheers
06-16-2018, 05:55 PM
#243
06-16-2018, 05:57 PM
#244
Boosted52F, any concerns with running those on track? Looks like even the wheel weights will be awfully close. I just bought the orange FIFTY calipers on Ebay (ATS style), but am considering re-selling them and going with your same setup...but that looks SO close in the pictures. How big of a spacer did you use? My camaro is strictly a track and autox car.
06-16-2018, 07:06 PM
#245
Boosted, are you running the 13.5 rotor setup? Also, what calipers did you use? I was looking around and quite a few gm vehicles starting in 2013 use the 13.5 brembo setup including the xts, cts, camaro, and corvette to name a few. But I noticed that the casting numbers were different from the corvette/ Camaro calipers compared to the others running the same 13.5 rotors. Anybody know if that could affect the mounting? Cuz if not you could get the 13.5" calipers A LOT less then the corvette ones.
06-17-2018, 07:42 AM
#247
Boosted, are you running the 13.5 rotor setup? Also, what calipers did you use? I was looking around and quite a few gm vehicles starting in 2013 use the 13.5 brembo setup including the xts, cts, camaro, and corvette to name a few. But I noticed that the casting numbers were different from the corvette/ Camaro calipers compared to the others running the same 13.5 rotors. Anybody know if that could affect the mounting? Cuz if not you could get the 13.5" calipers A LOT less then the corvette ones.
06-17-2018, 03:40 PM
#250
Here are the part numbers I have been able to come up with, everything was sourced from rockauto.
Cts- 1722640- $141.79
1722637- $153.79
xts- A-1 cardone 185481- $167.59
185480- $167.59
c7 jl9- centric part # 14262210- $274.79
14262209- $274.79
c7 j55- 1722621- $364.79
1722624- $364.79
Cts- 1722640- $141.79
1722637- $153.79
xts- A-1 cardone 185481- $167.59
185480- $167.59
c7 jl9- centric part # 14262210- $274.79
14262209- $274.79
c7 j55- 1722621- $364.79
1722624- $364.79
Last edited by taman86; 06-17-2018 at 10:22 PM.
06-17-2018, 04:09 PM
#251
Here are the part numbers I have been able to come up with, everything was sourced from rockauto.
Cts- 1722640- $141.79
1722637- $153.79
4 piston calipers
xts- 1722592- $175.79
1722593- $175.79
2 piston calipers
c7 jl9- centric part # 14262210- $274.79
14262209- $274.79
4 piston calipers
c7 j55- 1722621- $364.79
1722624- $364.79
4 piston calipers
Cts- 1722640- $141.79
1722637- $153.79
4 piston calipers
xts- 1722592- $175.79
1722593- $175.79
2 piston calipers
c7 jl9- centric part # 14262210- $274.79
14262209- $274.79
4 piston calipers
c7 j55- 1722621- $364.79
1722624- $364.79
4 piston calipers
06-21-2018, 05:45 AM
#254
Has any one put hands on that "2 piston" caliper. The pictures show 2 pistons on one side, with it being a fixed caliper, it wouldn't function correctly. It would be constantly trying to deflect the rotor and couldn't compensate for pad wear. Right???
06-22-2018, 01:12 PM
#255
On The Tree
The only XTS that gets a 2-piston caliper is the heavy duty / livery / professional option, which are basically the hearses and limos that come factory with 6-bolt hubs. They come with a 2-piston floating caliper that's basically a truck caliper. Just make sure if you're buying XTS calipers you don't get those ones.
06-22-2018, 02:10 PM
#256
I work in the plant that builds the XTS, and I can assure you wherever it says 2 piston caliper is a typo - they are definitely the same Brembo casting as all of the GM 13.5" rotor calipers. 4 pistons.
The only XTS that gets a 2-piston caliper is the heavy duty / livery / professional option, which are basically the hearses and limos that come factory with 6-bolt hubs. They come with a 2-piston floating caliper that's basically a truck caliper. Just make sure if you're buying XTS calipers you don't get those ones.
The only XTS that gets a 2-piston caliper is the heavy duty / livery / professional option, which are basically the hearses and limos that come factory with 6-bolt hubs. They come with a 2-piston floating caliper that's basically a truck caliper. Just make sure if you're buying XTS calipers you don't get those ones.
Last edited by 5.7stroker; 06-22-2018 at 07:10 PM.
07-23-2018, 12:59 PM
#258
Teching In
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Just installed the 6th gen FIFTY Brembo calipers + C7 base rotors. Extremely easy swap. My autox wheels, OEWheels C5Z 17x9.5, fit without spacer with PLENTY of clearance. My track wheels however, stock 02 SS wheels, don't. I tried a 15mm spacer, and it was way too much spacer. I'm thinking a 7mm will be enough. The reason I want as small of a spacer as possible is because a bigger spacer puts more stress on the already weak hubs.
07-23-2018, 05:38 PM
#259
Figured I would post up my go at this upgrade. I shopped around to find a deal on
Used calipers with good pads from ebay - $160
New rotors combo of amazon and ebay - $118
4 custom made adaptors, 15mm from motorsport-tech - $265
Caliper paint G2 - $30
Stickers - $5
Caliper bolts from fastenal - $6
According to my bathroom scale the stock rotors were 19.5 lbs and the new ones were 21 lbs. New calipers were .5 lbs heavier, for a total weight gain of 2 lbs per side. No issues with the stock brake lines.
[Pics removed to reduce bloat]
Used calipers with good pads from ebay - $160
New rotors combo of amazon and ebay - $118
4 custom made adaptors, 15mm from motorsport-tech - $265
Caliper paint G2 - $30
Stickers - $5
Caliper bolts from fastenal - $6
According to my bathroom scale the stock rotors were 19.5 lbs and the new ones were 21 lbs. New calipers were .5 lbs heavier, for a total weight gain of 2 lbs per side. No issues with the stock brake lines.
[Pics removed to reduce bloat]
