I'm going to be installing some new Willwood ProMatrix Pads on the front, as the pads are low in the front and I want something with a little more bite. I always thought that you should resurface rotors before putting new pads on but after reading a lot of threads in the roadracing/autocross section it seems a lot of people just swap pads using the same rotors? My rotors barely have a lip at all on the edge, very small. And the grooving doesn't seem too bad? Some people complain about warping after turning rotors. Would it be best to resurface these rotors, buy new ones, or just put the new pads on these rotors without doing anything to them?

The other thing that I've read is most places are lazy and put the brake lathe on a high speed to save time which cuts way too much material off the rotor unnecessarily. Does anybody know of any place I can go to bring the rotors in to have them turned? I've heard NAPA does this, I don't know if they still do? Thanks.

 

Personally I never turn or replace a rotor unless it's warped or too thin. The lip doesn't hurt anything because it's outside the pad contact area. The grooves or ridges don't hurt anything as they will soon cause the pad to conform to them so unless they're very deep, I wouldn't bother with turning the rotor.