Diabolis - you are correct, my mistake, I misread.

 

We are mistakes. We all make humans.

I don't have access to the MB parts database from here, but one thing that could possibly be true is that the Brembo calipers are the same between the P31/507/BS cars, and they just use a different pad to increase the larger swept area on the BS. Never looked into it myself, but I know that a number of manufacturers use a similar approach between different car models, as does RB for example with their BBK conversion application for the C63 (if you want to run their 390 mm F & 380 mm R rotors on your non-BS car using the OEM calipers).

 

^ Correct. BS front caliper is basically the same. Rears identical.

https://mbworld.org/forums/c63-amg-w...ml#post6254551

 

Has anybody installed a Racing Brake upgrade to BS size brakes or even the Carbon Ceramic Upgrade on their C63?


Is it really a good idea to go ceramic and keep the stock calipers? I am wondering whether heat dissipation into the brake fluid may be the bottleneck then. Aren't calipers designed for carbon brakes designed differently from the stock calipers for that reason?

 

There is always a room for improvement depending on what you are looking for when it comes to brake kit upgrade.

We offered the following BBK for Tundra:

2000-2006: (355x32mm vs. OE 319x28mm)
2007+: (410x34mm vs. OE 354x32mm)For Mercedes ML series: (390mm complete car kits)

 

These retrofit kits are OK for street driving, but if for track duty we prefer to offer a complete car kit built with RB calipers.

This is why we offered to GT-R track goers the complete brake kits, replacing their 6-pot front and 4-pot rear Brembo OE calipers to RB calipers.

RacingBrake Replacement Caliper Review:

 

In this case the calipers are not the limiting factor, and with all other things being equal there are no issues running carbon ceramic composite rotors with appropriate pads using the same capliers.

If you end up boiling the brake fluid it means you are overheating the brakes regardles of the type of material. While carbon ceramic rotors overall absorb somewhat less heat than steel, that is not their biggest advantage - it is the weight saving as they only weigh maybe 50% as much as an equivalent 2-piece steel disc / aluminum hat rotor.

If you are in a situation where you repeatedly end up boliling the brake fluid - not because the brake fluid is three years old but rather the size and design of the brakes - the first thing you should look into is installing brake cooling ducts. On my 928GT the front brakes are 304 mm (12") on a car that weighs ~3500 lbs. It has brake cooling ducts from the factory (built in the underbody panel) and despite repeated abuse at the track I have never been able to even get the pedal to feel spongy, let alone get anywhere near boiling the fluid despite the small-ish rotor size and relativey high vehicle weight.

Not sure how easy or practical it would be to run brake cooling ducts on a C63 (on the pre-FL cars, perhaps one could sacrifice the fog lights and run ducts from there but I really don't know what's underneath and whether there is other stuff in the way), but if you were using one as a track rat where brake cooling was essential, that would by far be the first logical starting point instead of moving to bigger or CC brakes. And, if I recall correctly, there was a company making wheel covers in all common bolt patterns a la E34 M5 that attached on the outside of the front wheels and essentially acted as scoops / propellers to cool the brakes (see pics below). Not exactly pretty but certainly functional.