Just to stick my nose up in this, both are right. You DO need something that will disipate heat better and quicker (larger rotor) but you also need/want something that'll let you slow down quicker (solid surface area). Thing is, I really have yet to see a big brake upgrade kit that offers say like "13 solid blank rotors. Look at all the popular big brake kits from Baer, Wilwood, AEM, Brembo, ALL come with slotted if not x-drilled rotors. Defeats the whole purpose of a larger brake, doesn't it?
Let me bump something else into the equasion here, what does THIS kind of brake system do for a car in terms of braking ability?
