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05-17-2018, 09:34 PM | #23 |
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Yes, we already stated that. What is not compatible is the CCB brake booster with these iron rotors.
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05-17-2018, 09:44 PM | #24 |
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05-17-2018, 10:52 PM | #25 | |
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Current M2 https://www.etkbmw.com/bmw/EN/search...M2/ECE/34_2206 M4 standard and CCB https://www.etkbmw.com/bmw/EN/search...M4/ECE/34_2206 |
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05-18-2018, 01:55 AM | #26 | |
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so given the M2 N55 uses M3/4 brake hardware, is the brake booster even that important as someone with a ceramic retrofit kit to fit, i might try them on road before dealing with the hassle of swapping the booster out |
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05-18-2018, 06:14 AM | #27 |
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What pad is the important question?! What pad will fit this - other than what BMW will sell? Is it a Brembo OEM that has steel and CCB options?
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05-18-2018, 08:33 AM | #28 | |
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We do not know yet the M2 Competition (2NH grey calipers) or the 2NH accessory (red calipers) included brake booster P/N will be. Neither if the M2 accessory 2NH kit will be fully OEM applicable to the M3/M4. All depends on the brake booster P/N included in those kits.
What we may conclude is that the M2 Competition caliper and rotors will fit the M3/M4 as M2 calipers and rotors are the same P/N as in the M3/M4. This is assuming that the M2 caliper mounting points (front struts and rear mount) and hubs are not changed for the M2 Competition. What we do know conclusively is that the M3/M4 brake booster is different between the CCB and the standard iron rotors, and the accessory CCB conversion includes the correct CCB brake booster. So using steel rotors with the CCB brake booster may be supported in the M2 ETK, but it is not supported in the M3/M4 anywhere so far. Quote:
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05-18-2018, 08:38 AM | #29 |
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05-18-2018, 11:43 AM | #30 | |
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Last edited by hellrotm; 05-18-2018 at 11:50 AM.. |
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05-18-2018, 02:59 PM | #31 | |
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Which means that BMW found something about brake boost/balance in the M2 particular chassis that required a less potent booster than in the M3/M4 with the same exact iron rotors and 4/2-piston calipers brakes. |
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05-18-2018, 03:03 PM | #32 | |
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Or are you saying the CCB brake booster is less potent? |
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05-18-2018, 04:12 PM | #33 | |
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It would be interesting for BMW to explain why they use this particular booster in the M2 but not in the M3/M4. |
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05-18-2018, 11:53 PM | #34 | |
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05-23-2018, 03:26 PM | #36 | ||
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***Disclaimer***Unofficially/not type approved, so far. That said, I've not come across anything preventing the physical installation. Without support from M GmbH however, intensive programming/coding/adaptation and competency necessary to do those steps. 50/50. Requires Amended Type Certification to officially offer it and the EOP clock is running. Quote:
M2, M3/4 Iron, M4 GTS (CCB), and M235iR all use the same brake servo. M3/4 all variants with CCB (excl GTS) do use a different servo. |
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05-24-2018, 12:25 PM | #37 |
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According to RealOEM.com, the brake booster for M2 is definitely the same part/number as M3/M4 with CCB rotors. That being said, perhaps we should also consider that BMW already had plans to put the bigger brakes in the M2, according to one of the Executives, they keep track of these forums (WHICH THEY SHOULD FOR HONEST OPINIONS), its been known that BMW Brakes, are good for beginners and occasional track days, but for some of us, they just don't hold up to repetitive heavy track days.
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05-24-2018, 02:37 PM | #38 | |
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M235i ECE with 9ML (Racing Manufacture): 34 33 7 850 999 M2 (All): 34 33 7 849 876 M3/4 (standard Brakes): 34 33 7 849 876 M4 GTS (MCCB): 34 33 7 849 876 M235iR (US): 34 33 7 849 876 |
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05-24-2018, 04:08 PM | #39 |
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Are you sure you are looking at right part numbers?
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05-24-2018, 04:31 PM | #40 | |
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05-25-2018, 04:46 AM | #41 | |
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. Im putting pictures showing that the brake booster is the same in M2 and M3/M4 with CCB... even the M4 GTS has same part number. But the brake booster in a standard blue iron brake rotor package on a M3/M4 is different. What am i missing? |
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05-25-2018, 09:49 AM | #42 | |
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Seeing now? |
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05-25-2018, 10:28 AM | #43 |
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Okay, well your lack of words and just putting numbers is what is confusing...
You wrote "M2, M3/4 Iron, M4 GTS (CCB), and M235iR all use the same brake servo. M3/4 all variants with CCB (excl GTS) do use a different servo." What variants, there are only two, Iron Rotor or Carbon Ceramics. **Standard M3/M4 (Convertible) Blue/ Iron Rotors have the ...999 part number brake servo. M2= 876. M3/M4 WITH CCB = 876 M4 GTS = 876 Long Story Short, M2 has always had bigger/better booster. |
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05-25-2018, 11:40 AM | #44 | |||
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Long story short, M2 uses the same servo as all the other 4pot front/2 pot rear Iron M Compound/M Sport/M Performance brake systems avail for 1er, 2er, 3er, and 4er. I'm not sure how this wasn't clear: Quote:
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F80/F80N - M3 Sedan/M3 Sedan LCI F80N - M3CS Sedan LCI F82/F82N - M4 Coupe/M4 Coupe LCI F82N - M4CS Coupe LCI F82 - M4 GTS Coupe F82N - M4 GTS Coupe LCI DTM Champions Edition F82N - M4 GT4 Coupe LCI F83/F83N - M4 Convertible/M4 Convertible LCI |
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