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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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