Quote Originally Posted by Big Baller
Crossdrilled rotors do not in fact run cooler. They are prone to cracking. Slotted rotors eat pads. I can post up links to back up all this info if you like.

You are better off running regular rotors. If you go to Napa they generally carry two or three diffrent grade rotors for each car, just buy the best ones they have. Thats what I was open tracking my mustang on.

Matt
The original purpose of crossdrilling rotors was to help release the gases emitted from the asbestos brake pads during braking. Any object with more surface area is going to cool faster, those holes are no differant than the principal behind a heat sink. Besides they look better too As for grooved rotors...the caliper is an OEM rear from Porsche so the pads are dirt cheap.

http://forums.importatlanta.com/showthread.php?t=26848

I've been putting together a custom brake setup, the rotors will be ordered through AP Racing...it's not the typical one piece steel rotor, it's basically an outer ring bolted to an aluminum rotor hat/bell. It's actually the same rear rotor from a Modified circle track car...