M2C competition brakes on F80m3/F82m4

[Encanto]

Originally Posted by RustySeatbelt

Does anyone know how much more these weigh than the stock brakes? This is significantly less expensive than a F/R BBK, but trying to understand from those who have experience with both if the gain is worth doing this conversion vs just staying stock?

4/2-piston stock calipers, 6/4 CCB calipers and 380/370mm rotors weight - https://f87.bimmerpost.com/forums/sh...93&postcount=1

Competition rotors weight: https://www.essexparts.com/news-blog...m2-competition

[CanAutM3]

Originally Posted by Encanto

4/2-piston stock calipers, 6/4 CCB calipers and 380/370mm rotors weight - https://f87.bimmerpost.com/forums/sh...93&postcount=1

Competition rotors weight: https://www.essexparts.com/news-blog...m2-competition

Thanks for sharing the link to the M2C big rotor weight.

By my calculation, the M2C upgraded brake kit adds 36lb of unsprung weight over the base iron setup. Massive and just not worth it IMO.

[LOW4LYF]

Originally Posted by davidstr

i may have a pair of m5 brembo 6 piston calipers, ergal custom brackets for the m2/3/4 ,hel braided hoses for sale.
They are spoken for but if the sale falls they will be available again
they also come with new bolts for the calipers and brackets.
Hoses and brackets are new, calipers only had one set of pads on them.
Can send pictures by whatsapp.
Will require m2 competition brake discs
sold

sold 😎

[the_scotsman]

Originally Posted by Encanto

The GTS uses the iron rotor booster with CCB rotors and its own particular coding OEM, the only model that uses that combination from factory. Any other model with CCB requires the iron rotor booster retrofitted when swapping CCB rotors with M2C iron rotors and coding.

I am interested in this thread for the future. However, a little digging does not validate your statement regarding the GTS brake booster.

Looking at REALOEM, The booster on the GTS is the same as used on the M4 with CCB - p/n 34337850999. The non CCB booster is p/n 34337849876 which also the booster using in the M2C (with regular or M Sport brakes).

Links:

M4 - https://www.realoem.com/bmw/enUS/sho...diagId=34_2206

GTS - https://www.realoem.com/bmw/enUS/sho...diagId=34_2206

M2C - https://www.realoem.com/bmw/enUS/sho...diagId=34_2206

[LOW4LYF]

The booster is only need if using ceramic disc.

[Encanto]

Back in 2018, ETK was showing -876 as the booster in the M4 GTS (CCB): https://f80.bimmerpost.com/forums/sh...1&postcount=42

Seems that it was a typo then as there is no part succession (-876 to -999) specified in the ETK.

Originally Posted by the_scotsman

I am interested in this thread for the future. However, a little digging does not validate your statement regarding the GTS brake booster.

Looking at REALOEM, The booster on the GTS is the same as used on the M4 with CCB - p/n 34337850999. The non CCB booster is p/n 34337849876 which also the booster using in the M2C (with regular or M Sport brakes).

Links:

M4 - https://www.realoem.com/bmw/enUS/sho...diagId=34_2206

GTS - https://www.realoem.com/bmw/enUS/sho...diagId=34_2206

M2C - https://www.realoem.com/bmw/enUS/sho...diagId=34_2206

[ttrank]

So has the “need” to replace the booster when going from full CCB setup to CCB car with retrofit iron rotors/pads been confirmed? Can this be addressed with coding or changes in driving style or do you have to swap it out? Seems to be different opinions.

I have CCB’s but looking for down the line when I need to replace the rotors. Street driven car.

Thanks

[yjypm]

Originally Posted by ttrank

So has the “need” to replace the booster when going from full CCB setup to CCB car with retrofit iron rotors/pads been confirmed? Can this be addressed with coding or changes in driving style or do you have to swap it out? Seems to be different opinions.

I have CCB’s but looking for down the line when I need to replace the rotors. Street driven car.

Thanks

Stock -> CCB I would say booster replacement is necessary. Otherwise you will probably get rear ended.

CCB -> steel like M2C rotors you might be fine with CCB booster if you don't mind more brake paddle travel.

[ttrank]

Originally Posted by yjypm

Stock -> CCB I would say booster replacement is necessary. Otherwise you will probably get rear ended.

CCB -> steel like M2C rotors you might be fine with CCB booster if you don't mind more brake paddle travel.

Thank you!

[rakusak]

Originally Posted by yjypm

Stock -> CCB I would say booster replacement is necessary. Otherwise you will probably get rear ended.

CCB -> steel like M2C rotors you might be fine with CCB booster if you don't mind more brake paddle travel.

I am in the same camp of agreement:

If you go from full CCB (from the factory) and switch to M2C setup with Gray brakes and steel rotors (could be OEM M2C setup or just swapping the rotors and pads, then you should be fine*. If you need more grab, they choose a more grabby pad, less grab, less grabby pad. Therefore avoiding coding all together.

My understanding of having to swap the booster is due to the pistons in the calipers and the carbon vs steel material compensions (for grab). Since the piston count and caliper is the same, just different color, it seems like you can do a plug and play.

[yjypm]

Originally Posted by rakusak

I am in the same camp of agreement:

If you go from full CCB (from the factory) and switch to M2C setup with Gray brakes and steel rotors (could be OEM M2C setup or just swapping the rotors and pads, then you should be fine*. If you need more grab, they choose a more grabby pad, less grab, less grabby pad. Therefore avoiding coding all together.

My understanding of having to swap the booster is due to the pistons in the calipers and the carbon vs steel material compensions (for grab). Since the piston count and caliper is the same, just different color, it seems like you can do a plug and play.

Since m2c runs the same booster as m2 og and m3/4 stock brakes I don't see the reason being the piston sizes. It should be solely the CCB rotor/pads friction. If you press a CCB pad against a CCB rotor and try to slide it you will be able to tell it's very grabby.

[Lifestyler]

Have anybody the coding data for the Dsc ecu when upgrading to the m2c bbk?

[LOW4LYF]

Originally Posted by Lifestyler

Have anybody the coding data for the Dsc ecu when upgrading to the m2c bbk?

You could try to put 2NH in the VO and code the DSC but I don't think it's necessary at all!

[andrej--h]

could not find any clear answer to my concern.
Hope somebody can help with a hint or his opinion.
I have the F83 with that basic Brake set up, which tempt to fade and overheat at the front. (rotor get crazy blue much more than rear)

Set up now

Front:
OEM 4 Piston Brembo Caliper
OEM 380mm rotors
Pads tried already DS2500,BremboHP,OEM
up to now DS2500 working best

Back.
OEM 2 Piston Brembo Caliper
OEM 370mm rotors
OEM Pads

I got a set of OEM gold CCB F8x 6x Pistons for the front.
Now i wonder if can just upgrade the brakes at the front 4> 6 Pistons?
at the rear i would stay with OEM 2 Piston Caliper and simply use a more agressive Pad

The idea is to install

Front:
OEM 6 Piston Brembo Caliper (paint in blue to match rear)
OEM M2C 400mm rotors
Pads DS2500

Back.
OEM 2 Piston Brembo Caliper
OEM 370mm rotors
OEM upgrade to DS2500

i am afraid the Balance between front and rear brake bite is to much?
Or is that something you can neglect.

On my M3 E46 i have installed the upgrade OEM the M-Performance Kit.
With front 6 Piston 370mm rotor and rear 2 Piston 345mm rotor which seems to be approved and wokring solution.

Any concern to upgrade on the F8x only the front brake and stay at rear with oem ??

[Encanto]

Originally Posted by andrej--h

Any concern to upgrade on the F8x only the front brake and stay at rear with oem ??

That is my brake mod, but with F10 M5 OEM 6-piston calipers, custom front brackets and HPS pads front/rear. Excellent brake feel, no noises, low dust.

[erik_m3g80]

I did yesterday a full retrofit and im very happy with the result

[andrej--h]

Originally Posted by erik-f80

I did yesterday a full retrofit and im very happy with the result

Looks great!
Do you have solution how to adjust ECU setting for DSC and the bigger brake set up?

[erik_m3g80]

Originally Posted by andrej--h

Looks great!
Do you have solution how to adjust ECU setting for DSC and the bigger brake set up?

To be honest, I think it will work like befor. Today night I will go for first ride to break in the Discs and pads.
If you go on Carbon ceramic than it will be different but in this case I don’t think so.

[theMpower]

After almost a year I can assure you that the feeling of the pedal changes completely with coding. If you don't think this, you can try an M2C with these brakes from factory. The difference is big

[andrej--h]

Originally Posted by theMpower

After almost a year I can assure you that the feeling of the pedal changes completely with coding. If you don't think this, you can try an M2C with these brakes from factory. The difference is big

Does it mean you upgraded from 4 to 6 piston? Where did you done the ecu flash at, official dealer?

[theMpower]

Originally Posted by andrej--h

Does it mean you upgraded from 4 to 6 piston? Where did you done the ecu flash at, official dealer?

Yes, I did the complete retrofit a year ago, with Endless ME22 brake pads and metal hoses. I did the coding too.

[erik_m3g80]

Originally Posted by theMpower

After almost a year I can assure you that the feeling of the pedal changes completely with coding. If you don't think this, you can try an M2C with these brakes from factory. The difference is big

Can you tell me what I have to code? I would like to give it a try with the coding. Maybe you’re right and I will like it much more. You can also tell me the coding by pm if you like :-)