Originally Posted by lucid
I am with JamesC here re: stock brakes. No doubt a high quality BBK will increase various aspects of braking performance (although I significantly doubt that it will decrease stopping distances much--assuming nothing is cooked).
When I asked the question of shorter stopping distances, I was thinking along the lines that bias could be sent more towards the rear with an aftermarket kit. I felt this difference with my stoptechs on my 350Z. In fact, the stock rears wore out much faster when I put on the front stoptech's which validates this assumption.
I just read the description of the PFC big brake kit on Bimmerworld and they actually mention more rear bias and shorter stopping distances so it looks like I'm on to something..
I'm not so sure I felt the same as you that I was outbraking anyone in the M3. I felt that the stopping distance was kind of long and that I didn't have the stability that I would have liked. Maybe it's the fact that I was coming from a lighter car with brake upgrades, or maybe because I was getting to much higher speeds before the brake zones. I have to brake a the 3 and 4 marker rather than the 2 and 3 marker of my Z.
For me the weak link on the M3 is the rotors cracking. Not really much fade since I'm using proper race pads and fluid. Come to think of it, pre-ducting I used to throw my old stoptech rotors away because of cracking long before I wore them out. After ducting, the cracking was reduced enough to acutally wear out the rotors. Seems like I'm treading that same fine line with the stock rotors. Ducting will hopefully be all I need.