In Reply to: Sweeping generalization not correct (more) posted by PeteS on July 26, 2000 at 14:51:01:
Anyone else notice that the front brake rotor diameters for the 330 and the M3 are the same? I've been hunting for the M3's brake diameters for a while now, for winter wheel issues, and i found that the fronts are 12.8" and the rear is 12.9". Then, i decided to check the 330's sizes because of BMW claiming they had to use 17" wheels as standard now, because of it's increased brake sizes. So, i discovered that the front brakes on the 330 are 326mm. I got my trusty calculator out, and discovered that that works out to 12.8"!!! Now, i would think that BMW would improve it's brakes for their premier 3-series, but now it appears that the //M has the same damn part! Anyone with some knowledge on this, please help me out here.
all BMW brakes suck for very heavy use like driving schools and I am sure E46 M3 owners will warp rotors. M5 guys in Europe already discovered those brakes are inadequate for autobahn runs and track events. Lots of them already went to AP Racing or Porsche.
KJK 91 M5
also needs a big brake kit.
If you look through the archives, you will see that most people recommend using stock brakes and track pads on the E36 M3 for "heavy" use. Upgrading to floating rotors works great too.
This is about all I've seen on anyones M3 at the track; including my own (I don't even use race pads; just Porterfield R4S and no fade after 30 minues of lapping Seattle Raceway which is hard on brakes).
While the M5's brakes do appear to be inadequate, the M3's are just fine. I'd expect the new M3 to meet or exceed the E36 in braking.
you have to upgrade for heavy track use. Whether that be pads, fluid or floating rotors. Or, maybe you are just slow. I am only joking.
If E36 M3's have gotten away with using stock parts that is great but I guarantee you that E30 M3's warp rotors, E28 M5's warp rotors and E34 M5's will warp rotors without upgrades. We should be getting brakes equal to Porsche, especially on cars that are $50k plus. So I stand by my sweeping generalization with the exception of the 850csi or '95 Euro M5 and possibly the Euro M3.