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      08-06-2008, 07:13 PM   #57

Drives: E92 M3 and Elise
Join Date: Oct 2006
Location: Land of the Microchip

iTrader: (0)

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.

Originally Posted by ArtPE View Post
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 would only perform better:
larger rotors
cross drilled
aluminum hats
more mass

think about it

btw: the PCCB's performed no better than the std 997S brakes
Manual gearboxes, the rotary dial of cars.