[mfarrzhp]

Originally Posted by AxM2CS

Agree, the reason to go to CCBs would *not* be lack of stopping power of the irons. They're mighty for this little car.

I'd be interested to see a braking test between the steel and ccb. I think it would be close. Certainly the CCB would fade less on on repeated attempts.

My steel brakes have had intermittent squeals and I agree a few hard brakes usually clear it up.

[2020M2Competition]

Originally Posted by AlpsRider

These brakes are meant to be used hard. Putting around in town causes them to squeak. A few hard stops will likely get rid of the squeaking temporarily. Jet washing the wheel/calipers usually gets rid of it also.

+1

Also worth noting, BMW uses fiber shims attached to the backing plates of the stock pads to try and reduce brake noise (instead of any grease or lubricant)

[ScullyD]

I'm considering putting in the the CCBs on, is chipping a real issue in every day traffic? Even the steel brakes are very tight.

[Bimmed Out]

Originally Posted by Golden3ye

When did the squealing start for you?

I had ceramics on two GT3s, a Turbo S and a Carrera T. For all four cars, the squealing started at the beginning and never stopped. But more important to me, I do not want to get another rock lodged between the caliper and rotor. It is not hard to chip or even crack ceramics and the replacement costs are exorbitant. Losing the brake dust is definitely nice but the performance difference just doesn’t justify these other issues imo. I have been very impressed with the standard brakes and they look gorgeous.

[kyrocks]

Originally Posted by Bimmed Out

I won't go back to ceramics. Too easily chipped and too much squealing. I optioned steels on my CS (they are fantastic) and will return to steels on my 992 GT3. With this said, I wish those with ceramics great luck and long enjoyment.

Both squeal.
I agree though that I prefer steel on my GT3/RS. You don't want to chip them if you're changing wheels and if you track lots the cost of replacement is $22k.

[ScullyD]

Originally Posted by Bimmed Out

I had ceramics on two GT3s, a Turbo S and a Carrera T. For all four cars, the squealing started at the beginning and never stopped. But more important to me, I do not want to get another rock lodged between the caliper and rotor. It is not hard to chip or even crack ceramics and the replacement costs are exorbitant. Losing the brake dust is definitely nice but the performance difference just doesn’t justify these other issues imo. I have been very impressed with the standard brakes and they look gorgeous.

Is it really this easy to chip a ceramic rotor?

[Driver87]

I just did my first track weekend with the CCB on my CS. I also ran the same track a year ago with my comp on steels. I did not feel a noticeable difference as far as I could tell.

What I can tell is my car isn't loaded with brake dust after a few hundred miles of hard braking over 2 days. They also do not squeal near as often.

To me if I tried to justify adding them after I'd have to really care about dust and appearance. I love detailing my cars and spending hours doing it, the steels are rusted right after it's clean and of course make a mess. TO ME it's totally worth the price and I do not regret the CCB's. Will it be expensive if I have to replace them in the future, sure. That's just the cost of doing business. Different priorities for everyone here, just my opinion.

[kyrocks]

Originally Posted by ScullyD

Is it really this easy to chip a ceramic rotor?

Sure is if you're changing wheels and bump the rotor with the wheel.

[Bimmed Out]

Originally Posted by ScullyD

Is it really this easy to chip a ceramic rotor?

Originally Posted by kyrocks

Sure is if you're changing wheels and bump the rotor with the wheel.

Or get a rock caught between the caliper and rotor. There isn't much room in there, so it isn't hard. This has been discussed elsewhere here on the M2 CS board and many times on RL. Harry discussed it in his M2 CS review as recently as a month ago:

Start @ 1:30.

[medphysdave]

Originally Posted by Bimmed Out

My CS steels don't squeal and my pcar steels haven't squealed, so I haven't found that to be the case. I agree with you on your point about changing wheels with the ceramic brakes, though. You need to be careful. And better to change the wheels yourself than have a tech do it, unless you know and trust the tech.

I forgot to go through a good bedding process. Usually this goes a long way towards keeping the noise down I'll need to spend some time on the brakes the next time I have some clear open road.

[Alpine*]

AFAIK, the steel calipers are the same size as the CCB versions, the rotors are the same or fractionally smaller in diameter, that said, I see no difference between brake options Re stones being caught between caliper and wheel.

Happy to be corrected of course.

[Alpine*]

When in carparks, dirt or gravel, I drive like Miss Daisy, ain’t no rocks gonna get stuck and scratch my little gold wheels.

[AlpsRider]

Originally Posted by Alpine*

When in carparks, dirt or gravel, I drive like Miss Daisy, ain’t no rocks gonna get stuck and scratch my little gold wheels.

I hope you can manage to keep the grooves off of your nice gold wheels. I've managed to get the grooves multiple times for no apparent reason.

[Golden3ye]

Originally Posted by AlpsRider

I hope you can manage to keep the grooves off of your nice gold wheels. I've managed to get the grooves multiple times for no apparent reason.

Same. I got one recently. Was going something like 30 mph around a gentle turn and got a rock stock between the caliper and wheel giving me a nice groove around the barre of my gold wheels. 400 miles on the car.

I’m assuming I soon will have it on all 4 wheels and there is little to be done about it.

[AlpsRider]

Originally Posted by Golden3ye

Same. I got one recently. Was going something like 30 mph around a gentle turn and got a rock stock between the caliper and wheel giving me a nice groove around the barre of my gold wheels. 400 miles on the car.

I’m assuming I soon will have it on all 4 wheels and there is little to be done about it.

I think it only happens on the front because if the huge calipers.

[ScullyD]

I was told by my parts department that the BMW Retrofit fit kit will not work for the CS (that BMW told them this via a support ticket).

Doesn't seem true to me, wonder if anyone can shed some light on this.

[medphysdave]

It could be the booster and coding. Coding can be done outside bmw. The booster may or may not be necessary. I wonder the the hat offsets could be different.

It could also be garbage info because the retrofit kit would likely not show up in a part search for the CS.

[f80_MG]

Originally Posted by ScullyD

I was told by my parts department that the BMW Retrofit fit kit will not work for the CS (that BMW told them this via a support ticket).

Doesn't seem true to me, wonder if anyone can shed some light on this.

No such issue, easily doable on M3 and M2 Comps. Motor trends Houston had a CCB conversion M2 comp last month for sale. (not visible online anymore since it sold).
It was inventory number 3860413, they might be able to give you additional information.

For now, booster P/N is the same on 2NH and 2NK M2. Was different on F80's.
Even on the F80's the pedal modulation was not vastly different with the new booster (just a little more gradual after the change, but could be driven comfortably with the blue brake booster-34337849876)

[medphysdave]

Originally Posted by f80_MG

No such issue, easily doable on M3 and M2 Comps. Motor trends Houston had a CCB conversion M2 comp last month for sale. (not visible online anymore since it sold).
It was inventory number 3860413, they might be able to give you additional information.

For now, booster P/N is the same on 2NH and 2NK M2. Was different on F80's.
Even on the F80's the pedal modulation was not vastly different with the new booster (just a little more gradual after the change, but could be driven comfortably with the blue brake booster-34337849876)

Good to know. I had wondered if any difference in the booster could be offset by pads. If one day I do the conversion I'll buy discs/pads and call it a day. No need to overthink or complicate it.

[ScullyD]

Originally Posted by f80_MG

No such issue, easily doable on M3 and M2 Comps. Motor trends Houston had a CCB conversion M2 comp last month for sale. (not visible online anymore since it sold).
It was inventory number 3860413, they might be able to give you additional information.

For now, booster P/N is the same on 2NH and 2NK M2. Was different on F80's.
Even on the F80's the pedal modulation was not vastly different with the new booster (just a little more gradual after the change, but could be driven comfortably with the blue brake booster-34337849876)

Yeah you and I talked about it, just wanted to triple check on here. I'm not a fan of the suspect information from BMW corporate/parts departments. More people will want to do this conversion, i suspect.

[f80_MG]

Originally Posted by ScullyD

Yeah you and I talked about it, just wanted to triple check on here. I'm not a fan of the suspect information from BMW corporate/parts departments. More people will want to do this conversion, i suspect.

For sure.
I don't trust the parts catalog, but will visually verify next month what the booster P/N is on the CS with CCB.
Sucks the TIS is no longer open access.

[bioman]

Getting a CS w/ CCBs, but I have a M2C and a M4 GTS. The CCBs are significantly touchier than the steel M2C brakes. Stopping power is likely identical, but I think the lower pedal effort to stop on CCBs add to the stronger braking perception.

Both squeal, CCBs squeal more often.