Why are carbon ceramics so sensitive

[z06ontrack]

I have a 19 B9 RS5 coupe with the carbon ceramic brakes; it takes very little pedal travel to have the brakes engage with probably 50 to 60 percent of the torque, very difficult to modulate, and I prefer a more linear progression.

[Zombie5150]

They certainly take some getting used to. Mine are pretty grabby but I’ve just learned to ease into them early rather than braking late. But I really like them when an emergency braking situation comes up. They stop the car quick.

[Burrcold]

I go back and forth between my ceramics on my RS5 and my Q7 (steel brakes). Whenever I jump back in the RS5 it takes a few stops for me to not be jerky with the brakes, but after a few stops I'm perfectly smooth with the ceramics again. I find that they are progressive, they are just strong with the initial bite.

[Ed99]

CCB's are meant for track focus so when you need to stop on the dime. Love Ceramic brakes...no more brake dust!!!

[VVG]

CCB's are meant for track focus so when you need to stop on the dime. Love Ceramic brakes...no more brake dust!!!

Most people who seriously track their cars do not use ceramic brakes. They are just too expensive to replace and heavy track use will still wear them down. That said, my first ceramics were on my 2020 Porsche 718 Spyder. I love the initial bite, the lack of fade, the lack of brake dust, the better ride due to much less unsprung mass, and the fact that I will never have to change the rotors (I only occasionally track the car) likely for the life of the car. I ordered them on my RS5 and absolutely love them. When I drive my wife's S4 or my Macan GTS now, the brakes feel squishy.

[DCB1951]

All of the preceding posts. ALL of them.

[Burrcold]

It sucks that Audi cheaped out and didn't have an option to have them on the rear like the RS6/7 and above RS models.

[Ed99]

It sucks that Audi cheaped out and didn't have an option to have them on the rear like the RS6/7 and above RS models.

Good point they should of had them on all 4 corners and not just the fronts!!

[DCB1951]

Good point they should of had them on all 4 corners and not just the fronts!!

... adding another 9k USD to the price. Are you still hot for the option?

Sent from my SM-G975U using Audizine Forum mobile app

[Burrcold]

... adding another 9k USD to the price. Are you still hot for the option?

Sent from my SM-G975U using Audizine Forum mobile app

They difference in price (in Canada) between an RS6 with 4 corner ceramics, and an RS5 with only front ceramics is $4k. I'd pay that extra to have them all around 100%.

[Ed99]

They difference in price (in Canada) between an RS6 with 4 corner ceramics, and an RS5 with only front ceramics is $4k. I'd pay that extra to have them all around 100%.

Agree I would pay extra for all 4 corners too!!! Everyone tells me once you go Ceramics in any previous cars you can't go back to the regular brakes lol.

[VVG]

Agree I would pay extra for all 4 corners too!!! Everyone tells me once you go Ceramics in any previous cars you can't go back to the regular brakes lol.

I agree that anyone who ordered Ceramic brakes on the RS5 would have paid to have them on all four corners, However I also see that they wanted to keep the car packages within a certain price point, and in all honesty, most of the braking on the car is done by the front system, with the rear just adding some force to maintain overall stability. I looked at both the RS6 and 7 when I was ordering my RS5. They were both just too big for me. I still don't fully understand why you can't get all the top features on smaller cars, especially at the RS trim level. Three things I would have ordered in my RS5 are the alcantara headliner, B&O Advanced 3D sound, and full ceramic brakes. In that way, I like what Porsche allows you to do, in that you can take an absolutely base model car, and get whatever options you may want.

[Burrcold]

I agree that anyone who ordered Ceramic brakes on the RS5 would have paid to have them on all four corners, However I also see that they wanted to keep the car packages within a certain price point, and in all honesty, most of the braking on the car is done by the front system, with the rear just adding some force to maintain overall stability. I looked at both the RS6 and 7 when I was ordering my RS5. They were both just too big for me. I still don't fully understand why you can't get all the top features on smaller cars, especially at the RS trim level. Three things I would have ordered in my RS5 are the alcantara headliner, B&O Advanced 3D sound, and full ceramic brakes. In that way, I like what Porsche allows you to do, in that you can take an absolutely base model car, and get whatever options you may want.

Audi needs to at least offer what the other competition is offering...for me that's what's annoying. An M3 or C63 you get the option of full ceramic brakes, you get extended leather options for the dashboard and door cards, carbon fiber roofs, etc. Don't get me wrong, I love the RS5, but like you, I wish there were more options that trickled down from the RS6 and above RS cars.

[z06ontrack]

I was hoping for a solution (different brake fluid etc.) but it appears everyone likes that huge torque initial bite, I just don't. I haven't had time to track the car yet, but I'm guessing that's were I'll really like the total braking capabilities of CC brakes. !40-150Mph to 40-100 mph is a lot different braking than on the street. I had just gotten the car and did a 3 day event (Treffen) in the Carolina mountains with braking in the 80-90 to 40 to 65 to 25 range and corners in excess of ninety degrees, so the that initial bite and braking force was difficult to modulate and took a lot of trail braking to get the car to rotate as opposed to really late braking.

Definitely don't need CC rears. The rears are just along for the ride and to create balance under heavy braking. I think the rear calipers on my RS5 are about the same size as they were on my S3, crazy!

So onto the track and I'll be changing stock brake fluid to Motul RBF 600

[JohnEnglish]

If you track the car with CC brakes, you’ll need new brakes after a couple of track days. There’s a reason why most car owners switch them out for regular steel brakes when they track their cars.

The CCBs on production cars are not the same are CCBs in race cars.

[RMode]

I have a 19 B9 RS5 coupe with the carbon ceramic brakes; it takes very little pedal travel to have the brakes engage with probably 50 to 60 percent of the torque, very difficult to modulate, and I prefer a more linear progression.

Much higher mu (coefficient of friction) on that pad/rotor combo. It’s a natural byproduct of a ccb setup.


Sent from my iPhone using Tapatalk

[z06ontrack]

If you track the car with CC brakes, you’ll need new brakes after a couple of track days. There’s a reason why most car owners switch them out for regular steel brakes when they track their cars.

The CCBs on production cars are not the same are CCBs in race cars.

Oh they'll last a lot longer than that. My Corvette ZR1 had CC with at least 11 track days and didn't need replacement. Weighing the rotors was the only way we could to tell if they were worn out.

[RMode]

Agree I would pay extra for all 4 corners too!!! Everyone tells me once you go Ceramics in any previous cars you can't go back to the regular brakes lol.

I’d beg to differ :) I’ve had them on cars before, and for my overall mixed use, steel all day. They each have their place, but the steel gives more options to tailor performance and wear for use case.


Sent from my iPhone using Tapatalk

[RMode]

If you track the car with CC brakes, you’ll need new brakes after a couple of track days. There’s a reason why most car owners switch them out for regular steel brakes when they track their cars.

The CCBs on production cars are not the same are CCBs in race cars.

This really isn’t accurate, as the term “track” is as broad as the term “model” and “influencer”. The combo of your tire and your brake and your skill and the track type will ultimately determine the wear rate. I had 15k miles on my last ccb setup, combined street use with then pilot PS3, and 20 track days with r888s, at a few northeast tracks, and never had to do any maintenance beyond regular fluid changes. This was on a GTR, so not at all a lightweight car. Wear to pads and rotor were minimal. I ultimately sold the setup, and went to a larger steel set to take better advantage of pad choice.

There are also numerous firms making aftermarket replacement carbon rotors for many cars now, and multiple pad options depending on the car. Not nearly the amount of choices as a steel setup, but options exist outside of OEM audi.

Keep in mind most “track days” are fun runs. There’s no competition per say. It’s not a race. Even for those of us in the faster run groups, it’s different to actual competition use.


Sent from my iPhone using Tapatalk