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Originally Posted by coldkilla
wow, where did you go to school? i thought that this was a basic element of brake theory that everyone understood but apparently not. the surface area of the pad has absolutely nothing to do with heat transfer in the manner that you are speaking of. the pad creates heat by rubbing against the rotor, turning friction into heat. the rotor, in turn needs to effectively handle this heat and dissapate it. THE MORE ROTOR THAT YOU HAVE, THE MORE HEAT IT CAN HANDLE BEFORE FAILURE AND IT CAN DISSAPATE THIS HEAT FASTER BECAUSE IT HAS MORE SURFACE AREA. once you start cutting holes and slots in the rotor, you are taking mass away and you now have less rotor. this is not opinion or conjecture, this is fact. someone made the analogy of boiling water. put just a small amount of water in a pot and boil it. now put a lot of water in a pot and boil it. the pot with less water will boil first because there is less water to soak up the heat. the same principal works with rotors, why do you think rotors are so damn heavy? they are made with enough mass to effectively soak up the heat and dissapate it before they become heat soaked and ineffective. as far as real world results, which is better, blah blah blah. i dont care, whatever makes you happy, just dont turn this **** into voodoo as its really quite simple.
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how do you think the heat is removed from the rotor? not through mass "soaking up heat " but by pure convection. why do you think high performance cars have brake ducts that force air directly to the rotors??
forced convection with turbulent flow will transfer more heat than forced convection with laminar flow. like i said above, as the rotor moves through the air, the holes will trip the air turbulent pulling more heat off of the surface. simple fact found in any heat transfer book. im not trying to be cocky, im just stating the laws of convection.