Will the M2 Competition upgraded steel brakes option fit the M3/M4?

[erik-f80]

Originally Posted by Encanto

The reason for the 2.5mm offset was because the M5 iron rotors do not have the same offset as the CCB rotors (and now the M2 ZCP rotors). For the caliper to be centered in the rotor, a 2.5mm shim was installed to the CCB brackets to move the calipers towards the inside of the car and center the rotor with the calipers.

That M5 rotors with CCB calipers mod is moot now with the M2 ZCP rotors in the market.

Ok got it Now it’s time to Safe money for the retrofitt

[Bluer2]

So to put this year old question to rest, Yes the M2 Comp upgraded steel brake rotor will fit.

[PayamFSU]

Originally Posted by Bluer2

So to put this year old question to rest, Yes the M2 Comp upgraded steel brake rotor will fit.

Nice ! Where did u find the best price for these ?

[Bluer2]

Originally Posted by PayamFSU

Nice ! Where did u find the best price for these ?

getbmwparts.com

[RustySeatbelt]

Originally Posted by Bluer2

getbmwparts.com

I'm assuming you originally had the CCB brakes?

[Bluer2]

Originally Posted by RustySeatbelt

I'm assuming you originally had the CCB brakes?

nope I had the stock blue 4 pot calipers. I bought a used set of CCB calipers

[RustySeatbelt]

Originally Posted by Bluer2

nope I had the stock blue 4 pot calipers. I bought a used set of CCB calipers

Any change to the booster, or straight forward swap of rotors and calipers? Notice any negative feel to the brakes?

[Bluer2]

Originally Posted by RustySeatbelt

Any change to the booster, or straight forward swap of rotors and calipers? Notice any negative feel to the brakes?

No change to the booster for steel rotors. Yes it is a straight forward swap no custom work needed. No negative feel to the brakes. The front end feels a touch heavier from the heavier rotors but the brakes are much better with the 6 piston front and 4 piston rear calipers. I also put in braided stainless steel brake lines when I did the swap.

[Slips]

Originally Posted by Bluer2

No change to the booster for steel rotors. Yes it is a straight forward swap no custom work needed. No negative feel to the brakes. The front end feels a touch heavier from the heavier rotors but the brakes are much better with the 6 piston front and 4 piston rear calipers. I also put in braided stainless steel brake lines when I did the swap.

Did you use the CCB gold callipers for the rear?
If so what discs did you use on the rear?
What pads?

Thanks

[amarxyz]

Originally Posted by Slips

Did you use the CCB gold callipers for the rear?
If so what discs did you use on the rear?
What pads?

Thanks

I'm interested too

[Encanto]

Originally Posted by Slips

Did you use the CCB gold callipers for the rear?
If so what discs did you use on the rear?
What pads?

Thanks

Front rotors: 34118072017/18
Rear rotors: 34118072019/20

[Bluer2]

The F8X rear rotors don't really work. The gold calipers brake pads don't cover the entire surface area of the rotor.

[Encanto]

Originally Posted by Bluer2

The F8X rear rotors don't really work. The gold calipers brake pads don't cover the entire surface area of the rotor.

Those are the P/N of the M2 ZCP rotors.

And the 4-piston calipers do work with the F8x rear rotors if you select the right pads. Again, that’s moot now with the M2 ZCP rear rotors and correct pads.

[Bluer2]

Originally Posted by Encanto

Those are the P/N of the M2 ZCP rotors.

And the 4-piston calipers do work with the F8x rear rotors if you select the right pads. Again, that’s moot now with the M2 ZCP rear rotors and correct pads.

Is it M2 ZCP rear rotors or M2 ZCP equipped with Sport Brake Kit rear rotors?
There is a difference as the base M2 ZCP rear rotors is the same as the F8X rear rotor. But the Sport Brake Kit rear rotors I was given part number 34118072019/20. Please help me confirm. Thanks.

[Bluer2]

Originally Posted by Encanto

Those are the P/N of the M2 ZCP rotors.

And the 4-piston calipers do work with the F8x rear rotors if you select the right pads. Again, that’s moot now with the M2 ZCP rear rotors and correct pads.

I am using the OEM M2 Sport Brake kit rear pads and it doesn't cover the entire rotor. Maybe I need to go aftermarket pads, but that sucks because I am also using OEM M5 front pads.

I am guessing the design and shape of the M2 sport Brake kit rear pads have to be used with the Sport brake kit rear rotors.

[Encanto]

Originally Posted by Bluer2

Is it M2 ZCP rear rotors or M2 ZCP equipped with Sport Brake Kit rear rotors?
There is a difference as the base M2 ZCP rear rotors is the same as the F8X rear rotor. But the Sport Brake Kit rear rotors I was given part number 34118072019/20. Please help me confirm. Thanks.

My mistake, correct P/N is 34118072019/20 ZCP for rear rotors.

Note that outside the USA, the M2 ZCP come standard with the same F8x brakes. What the ETK calls M Sport Brake kit is optional outside the USA, standard in the USA.

Front rotors in the M2 ZCP are 400mm x 36mm, rear rotors are 380mm X 28mm. P/N for the rotors include the size dimensions in their description so no confusion.

[Encanto]

Originally Posted by Bluer2

I am using the OEM M2 Sport Brake kit rear pads and it doesn't cover the entire rotor. Maybe I need to go aftermarket pads, but that sucks because I am also using OEM M5 front pads.

I am guessing the design and shape of the M2 sport Brake kit rear pads have to be used with the Sport brake kit rear rotors.

The rotors are different in diameter, thickness and more significant, the radius of the hat. That is what you see when the 4-piston caliper is fitted to the 370mm rotors -the hat radius is smaller than in the 380mm rotor by more than the 10mm difference in diameter. So the Sport pad is missing more than 10mm of rotor contact surface. This fact is not unusual as you may see the same lack of total contact surface in the CCB rotors with these calipers. It cannot be easily noticed just because the rotors are dark grey and the area without pad contact looks almost the same as the rest of the rotor. In the iron rotor the non-contact area will be covered in rust in no time. Braking difference is negligible.

There are other pads that fit those 4-piston calipers that can reduce that non-contact area by 5-8mm. This may have worked before, but now the proper way is to replace the 370mm rotors with the 380mm.

[Bluer2]

Originally Posted by Encanto

The rotors are different in diameter, thickness and more significant, the radius of the hat. That is what you see when the 4-piston caliper is fitted to the 370mm rotors -the hat radius is smaller than in the 380mm rotor by more than the 10mm difference in diameter. So the Sport pad is missing more than 10mm of rotor contact surface. This fact is not unusual as you may see the same lack of total contact surface in the CCB rotors with these calipers. It cannot be easily noticed just because the rotors are dark grey and the area without pad contact looks almost the same as the rest of the rotor. In the iron rotor the non-contact area will be covered in rust in no time. Braking difference is negligible.

There are other pads that fit those 4-piston calipers that can reduce that non-contact area by 5-8mm. This may have worked before, but now the proper way is to replace the 370mm rotors with the 380mm.

Great info. Thanks. I will be ordering the 380mm rear rotors. Even though the braking difference is negligible. The lack of total contact coverage with the OEM pads has my OCD on overdrive. Not to mention the rust build up that will accumulate on the inner ring of the 370mm rotors.

[Sinof]

Got my car back from the dealer: changed the 4 standard blue calipers to the ccb calipers (front + back) and the M2 competition discs + pads on my F83. No coding, no change of brake pump and everything works like from the factory. Total cost around 7000€ with new parts from the dealer.

[Franzino]

Originally Posted by Sinof

Got my car back from the dealer: changed the 4 standard blue calipers to the ccb calipers (front + back) and the M2 competition discs + pads on my F83. No coding, no change of brake pump and everything works like from the factory. Total cost around 7000€ with new parts from the dealer.

I got a quote today for the full M performance sport brakes from my BMW M specialist. The red set is at least 1.000euro's cheaper as a package then bought everything separately... But the main question is; how good are they on track when comparing them with the standard blue brakes (both fitted with track pads and different brake oil)?