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Originally Posted by drburton
I don't really know much about this, but for heavy use on the track isn't there an advantage to the drilled b/c of airflow and cooling.
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supposedly. i don't think that the airflow issue matters much as essentially all high performance rotors are vented anyway; this provides the primary means of convection cooling. i DO think that drilled or slotted rotors help w/ green fade or with transfer buildup by giving escaped gasses, brake dust, etc a place to go rather than between the rotor and pad.
i don't think you can install a drilled rotor on a car and really tell the difference between a solid one. if it makes a difference, it's secondary, and it carries an added risk of cracks and an added disadvantage of reducing swept area. i DO know that plenty of race teams opt for solid rotors.