I don't think anyone is complaining the M3s brakes are ineffective anywhere except on a race track while being pushed very hard.
However, that doesn't change the fact that the caliper design is painfull to work with and they will fail under track conditions.
Should you expect a street cars brakes to hold up on a race track, normally no. However they do market the car as suitable for those purposes.
Quote:
Originally Posted by ArtPE
the C&D test is very valid...
100-0 1/2 g stop
20 seconds
100-0 max g
20 seconds
100-0 max g
20 seconds
100-0 max g
20 seconds
100-0 max g
20 sec
repeat until failure
one cycle takes ~ 5(20) + 5 (5) ~ 125 sec, 2 minutes...
the 335i did not fail, but the warning light came on after 7 cycles!
35 100-0 stops in 14 minutes...
pedal travel increased 1.5 inch, the PCCB's ~0.75"
pedal force, 18 lbs to 23 lbs or so
the M3 brakes are much better and the tires larger...it would only perform better:
larger rotors
cross drilled
aluminum hats
floating
more mass
think about it
btw: the PCCB's performed no better than the std 997S brakes
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