by beeker » Wed Oct 12, 2005 7:01 pm
Slotted are good, drilled is bad.
Drilled looks bling, but will crack under extreme heat. Technically drilled is also lighter, and thus reduces unsprung weight, but the reality in a road car is it wont make a noticeable difference. I heard (non confirmed), that proper drilled is in fact cast holes, as drilling isn't as long lasting as casting the hole.
Slotted will help extract gas away from the pad under extreme use, and will also skim any glazing from the pad (but will result in slightly more pad wear).
Stick with plain or slotted. Remember, even plain rotors come in a variety of quality, ensure you get some good ones. Try Trade Parts, they have always been good for me.
94 DC2 Integra Race Car
02 M3 Race Car build
06 RS4 Avant