10-16-2014, 11:01 PM | #1 |
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Anyone know how the CCB's at the BMW events holding up?
Does anyone have any insight to how the CCB's are holding up on the M3/M4's being used for the performance schools, trackday events etc.
There's so much conflicting information about the longevity of CCB's, I'm curious to see if they're holding up, or if they're constantly having to change pads/rotors these vehicles seeing a lot of duty |
10-17-2014, 08:19 AM | #2 |
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I think its still too early to tell, unless people have trashed them after a couple track days..
But I agree, I would also be curious.
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10-18-2014, 04:42 AM | #3 | |
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10-24-2014, 12:23 AM | #4 | |
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thanks for the info. As someone who tracks their car would you get the CCB's again? Did the pros outweigh the cons for you? |
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10-24-2014, 05:12 AM | #5 | ||
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10-28-2014, 09:30 AM | #6 |
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If they're anything like the Porsche PCCB, you should be fine with wear/tear as long as you replace pads around 50%. I've heard of people avoiding the disc replacement that way. Then again, PCCBs are a bit pricier than the BMW system...
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11-14-2014, 09:12 PM | #10 | |
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11-14-2014, 09:22 PM | #11 |
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Is this on an F8X or on your M6?
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11-14-2014, 09:36 PM | #12 |
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11-15-2014, 08:54 PM | #13 |
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11-15-2014, 08:59 PM | #14 |
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But back to the original poster's question, I have not tracked the car but I have driven several times in the rain. I notice no noise. If I didn't know the CCB option was there, I wouldn't be aware of them in the wet.
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11-15-2014, 09:07 PM | #15 |
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Since we don't yet have enough data on the Bimmers: There is a very good article in Panorama (the PCA monthly mag) on the 2nd gen PCCBs that are tracked. It basically concludes by the accounts of two different cars (997 TT and 987 Spyder) and drivers' perspectives that the PCCBs lasted half the time of the iron discs of Porsche when use at the track even with only Porsche brake pads.
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11-15-2014, 09:27 PM | #16 | |
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11-15-2014, 10:00 PM | #17 |
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That was their experience on the track, they were both getting 5-6 days out of a set of rotors, with the irons they were getting 10-12 days. Also, although the pedal feel was always firm with better initial bite, the writer preferred the feel of irons. Furthermore, although there was significant unsprung mass increase with the irons, the writer was still faster on the track with them than with the PCCBs.
Porsche is now on 3rd gen PCCBs, similar to BMWs I suspect as they are both made by Brembo SG; however, their experience is similar to mine although I do not have long term experience with PCCBs. Another thing to point out is that they are comparing performances of Porsche's CCBs to Porsche's iron setup, beside the rotor differences in material, the iron setup uses the same type and size of calipers and rotors, which is not the case with BMW obviously. |
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11-16-2014, 12:46 AM | #18 | |
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This was my biggest concern. CCB's would last the life of the car for daily use, but if you were to track the car at all they would degrade sooner than iron rotors |
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11-16-2014, 01:33 AM | #19 | |
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On a Porsche I would not buy the option because the iron setup is race quality, I personally don't believe it is the case with BMW. The only thing missing from both marques though is Bosch M4 ABS unit; only if that was offered as an option, even at $10K, I would have checked for it |
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11-16-2014, 11:18 AM | #20 |
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No disrespect to FTS, but I wouldn't benchmark ceramic rotor longevity based on a magazine article even if it was written by racing drivers.
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11-16-2014, 01:25 PM | #21 |
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No disrespect at all, it is just another point of view, and I agree with you. We need specific examples of our own use with the F8x IMO. By the way to clarify the author made a point to mention he is NOT a racing driver but an experienced DE'er which what I am as well.
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11-16-2014, 03:07 PM | #22 |
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Ceramic brakes were never designed for longevity.
Brakes slow the car by converting the kinetic energy to heat energy, the faster you are travelling when braking, the harder you brake and the more often you brake (ie track driving) the more heat energy is generated. The function of ceramic brakes is to dissipate this heat quicker. The material of the ceramic rotors do this by holding the heat at the surface, and because you are applying the same amount of heat energy to only a small proportion of the rotor the temperatures can rise quite quickly. The increased temperature is what causes the carbon in the discs to oxidise, reducing their weight and strength. If the temperature of the discs is kept low (street driving) then they should last the life of the vehicle. The more time the discs are kept at high temperatures and the higher the temperature the more their life is reduced. |
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