04-05-2018, 06:52 PM | #25 |
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04-05-2018, 08:09 PM | #26 | |
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My understanding is that it is due to the greater force multiplication ratio from the increased piston area of the CCB callipers. Since the piston area of the CCB callipers is greater than the one of the iron rotors, and since both use the same master cylinder, a given force on the brake pedal will yield a higher clamping force on the CCB rotors, hence why less boost assist is needed.
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04-05-2018, 08:17 PM | #27 |
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The brake booster install is the main issue getting me over the line doing the retro - it's going to be a Kent of a job to swap out and then makes removing for resale another problem
I'd be inclined to install all the hardware and go for a drive with steel brake booster first to see if they aren't too grabby/hard to modulate light pressure Encanto can you provide me the exact coding line that needs to be changed? I wonder if the kit ships with instructions on how to code it or if it's kept as dealer ip - if the later I'll have to buy the kit here at a much higher price so dealer can complete install |
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04-05-2018, 09:42 PM | #28 | |
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I may be wrong in my interpretation, though. |
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04-05-2018, 09:48 PM | #29 | |
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04-06-2018, 09:22 AM | #30 | |
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04-06-2018, 09:55 AM | #31 |
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Section 5.3.
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04-08-2018, 06:23 AM | #32 |
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for the link. You are right, it is pretty black on white on that document about the coefficient of friction.
However, the engineer in me can't help to think that the greater piston area in the calipers also has an effect, it's basic physics.
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04-12-2018, 12:04 PM | #35 |
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Not sure what you mean ?
CCB have been offered as an option on the M3 starting with the launch of the F8X platform in 2014. They have never been standard equipment except for the M4GTS.
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04-12-2018, 11:09 PM | #36 | |
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I just googled and for some inexplicable reason BMW took that option off the build page on their website Last edited by foofighter; 04-12-2018 at 11:17 PM.. |
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05-01-2018, 02:37 PM | #37 |
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F80 M3 HRE FF04 275/305.
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05-01-2018, 08:41 PM | #38 | |
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It's not an easy job given all the bracing around the front scuttle - you'd be half way there if doing a coil over install |
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05-01-2018, 09:38 PM | #39 |
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CCB (gold) brake calipers:
Front 6 pistons: 30/34/36mm = 52.7 cm^2 (68%) Rear 4 pistons: 28/28mm = 24.6 cm^2 (32%) Total: 77.4 cm^2 Iron (blue) brake calipers: Front 4 pistons: 40/40mm = 50.3 cm^2 (67%) Rear 2 pisotns: 40mm cm = 25.1 cm^2 (33%) Total: 75.4 cm^2 |
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05-02-2018, 07:51 AM | #41 | |
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Interesting to see the CCB have slightly more front brake bias. May I ask for your source for the piston diameters?
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05-02-2018, 07:52 AM | #42 |
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I gather those are the caliper piston diameters and the resulting total piston areas front and rear.
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06-24-2018, 11:22 PM | #43 |
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Bump
Finally received my kit Took ages to get an order out of bmw factory given these cars are going out of production Still unsure about the exact coding required so will need to start process of finding a remote tuner who does The plan is to install the booster, even though a small difference, if bmw went through trouble to offer another version it’s worth heeding their advise |
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