Interesting article.... I thought I would post it here to spur discussion. The author states............. "In fact every case of "warped brake disc" that I have investigated, whether on a racing car or a street car, has turned out to be friction pad material transferred unevenly to the surface of the disc. This uneven deposition results in thickness variation (TV) or run-out due to hot spotting that occurred at elevated temperatures" http://www.stoptech.com/tech_info/wp_warped_brakedisk.shtml
the author's discussion concerning breaking in new pads & rotors is correct. you also have to consider the quality of brake rotors on the market today. they are mostly chinese produced and in my opinion are not the quality of north american produced units and warp more quickly. the rotors are so bad you have to replace instead on turning.
Brings back memories. This was brought up a few years ago when I was very involved in the Lincoln Mark VIII forum. In certain cases that theory could be fact but if it was truely an uneven build up of pad material on the rotor every time, you could cut the rotor only removing the uneven pad material and get rid of a pulsing pedal therefore alowwing the rotro to be reused over and over. You wouldn't need to actually cut steel or very little and the rotors would last and last at least as far as not causing a pulsing brake pedal. I have seen enough rotors cut and dial indicated enough and know the difference between steel and pad material. That just hasn't been my experience.
ya i call bs on this for 99.9% of cars on the road ever think of how hot the rotors are and then you sit there with your foot on the brake at a red light lots of squeezing force on hot metal its not gonna stay even for long even using brakes while driving they dont equally squeeze all the way around and if it was just pad ya you could just buff it off and your rotors would be new again
