03-24-2021, 07:09 AM | #156 |
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Hey All, just got a M3CS and am looking to upgrade my brakes. Was very interested in the AP Racing Kit, but the price + fact that my car is still under warranty, can be annoying with the MA dealerships.
Another + point for me, would be I simply love the M3 CS in its original form, hence am doing my best to keep it OEM. That said, has anyone ever looked in to just buying the calipers from BMW, and using the RB Rotors or Girodisc Rotors, which are you usually significantly less in weight than OEM Rotors? Thanks! |
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04-08-2021, 09:50 AM | #157 |
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I just bought a M2c caliper & rotor set and I'm wondering if I need special brackets for the front calipers to fit on my '18 M3 ZCP with the normal blue brakes? I see there is a guy selling a bracket for the retrofit but no mention of it here in this thread.
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05-06-2021, 04:35 AM | #160 |
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Yes. way too heavy for me. I will change out the heavy discs and go down to the stock size discs but lighter aftermarket ones. I just need to find adapters for the CCB calipers to move them in.
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05-08-2021, 10:30 AM | #161 |
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I got interested to replace my rear brake to M2C but was not sure if it is 100% plug-n-play. I actually open a post asking the question but decided to do the calculation.
Follow below what I just posted on the other topic but would like to share and make sure you are aware. In case you have already done it the alternative is to use a more aggressive pad on the rear. Also you most likely feel the brake more sensitive and overall piston area for M2C is slightly smaller so less pedal travel is required. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx I had the chance to measure rear caliper piston diameter and confirm it has 44mm. So it means there is a bias shift to front around 4-5%. M4 iron Front 4 pistons : 40/40mm = 50.26 cm^2 (62%) Rear 2 pistons : 44mm = 30.40 cm^2 (38%) Total : 80.67 cm^2 M2C Front 6 pistons : 30/34/36mm = 52.65 cm^2 (68%) Rear 4 pistons : 28/28mm = 24.63 cm^2 (32%) Total : 77.28 cm^2 As you can see the shift in piston area is around 6% but as this is slightly offset due difference in rotor diameter but still not enough to match M4 bias. To summarize : if you shift to M2C your brake bias will change 4-5% to the front. |
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05-12-2021, 08:27 AM | #162 |
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I see some people have code their M4/M3 non CCB to M2C brakes (bigger calipers and rotors. According what I read it needs VO edit for 2NH. I was able to do that but do you have the details about the CAFD which needs to be modified?
Could you also share your driving experience after the coding? |
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05-15-2021, 05:22 AM | #163 |
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Has anyone with M3/M4 gone from CCB to rotors and pads from M2C?
The hub on my CCB cracked and it is substantially cheaper to change to M2C rotors and pads all over (front and rear) than to change just one rear CCB rotor (and BMW recommend to change them in pairs anyway). To what I understand, the M2C rotors and pads are bolt-on to the M3/M4 CCB, but it would be recommended to change the booster (going from ceramic to steel). Anyone with actual experience on changing from CCB to M2C rotors and pads? Last edited by Walkabout; 05-15-2021 at 08:53 AM.. |
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05-15-2021, 01:54 PM | #165 |
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those are the stock m2c calipers, front and rear. my question is, the adapter for the caliper to hub, does it come with the caliper or is it purchased separate?
Last edited by m4AY; 05-15-2021 at 02:04 PM.. |
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05-15-2021, 04:31 PM | #166 | |
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Racingbrake.com may sell you some used brackets. |
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05-15-2021, 06:18 PM | #168 |
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Yeah the caliper bracket., brain fart. Yes then it is a direct bolt on. I'm a tech at bmw, interesting to see what I can get the complete set for, I'm in need of brakes
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05-20-2021, 04:06 AM | #170 |
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morning
has anyone done just the front conversion only to the M2C 6 pots and lets the rears at std 2pot? if so any side affects to this? i presume not as the likes of AP will sell you a front only kit etc
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05-20-2021, 08:51 AM | #173 |
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Just wanted to share my personal beliefs as a summary from the different opinions shared here:
Caliper Info:
Rotor Info:
Pads:
Brake Booster The booster replacements are to lower the system vacuum assist with larger brakes and CCB, the stock iron blue calipers need more assist. So do I need to change my brake booster? I don't think there is a right answer - as it’s all up to preference.
I can't confirm - but I believe coding goes hand in hand with TC to accommodate the changes in booster volume. I say this cautiously, but we have drive by wire gas pedals, but not brake by wire brake pedals. So a technically a code can't change pedal feel. But then I have also read how there is something called dynamic brake control, where the car senses potential Collison and adds more vacuum in to the booster so that you have max effect on brakes when the driver stomps on the pedal. What about the MASSIVE WEIGHT OF THE IRON ROTORS vs CERAMICS... Yes, the iron rotors are definitely heavier than CCBs no matter how you play it. But here are some benefits that may help you sleep better:
Last edited by CSM3; 05-20-2021 at 08:59 AM.. |
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05-20-2021, 09:00 AM | #174 | |
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05-20-2021, 10:48 AM | #175 |
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Cheers all
Next stupid question... if you ran better fluid like rbf600 are the stick pads ok for very occasional track use or are they just dog sh*te on track and stock pads only good for road use |
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05-20-2021, 06:53 PM | #176 |
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Still dog shite on track and only good for street use.
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