Quote:
Originally Posted by BigRon033
They've done that on every BMW with the integrated EMF parking brake starting with the F10. I'd imagine this saves weight and complexity compared to the E70/F15 electric parking brake system (central motor, cables, and drum in hat parking brake shoes). I don't see them going away from that, even with the M3/M5/M8. The F87 M2 is probably going to be the last BMW with a fixed rear caliper.
I don't see it affecting braking performance by having a floating rear caliper. Just look at the F90 or F10 M5. Those brakes are MASSIVE and those things stop on a dime, even with a relatively small rear EMF caliper. As long as the single piston size and rotor diameter is appropriate, they should be able to retain some really good braking performance.
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The only issue I have with sliding calipers is more of a reaction issue. Monoblocs clamp down very quickly and are less prone to piston knock-back...which is also related to the hub design...sliding calipers react slower to clamping down. For the street, probably less of an issue. On the track, I take issue with that.
As far as looks, yeah, M cars should have two or four piston monoblocs in the rear...just sayin.