Quote:
Originally Posted by gramicci101
Drilling and slotting remove mass from the heat sink (rotor) which makes it less effective at absorbing heat from the pads. You could make more effective change with fluid, titanium pad shims (debatable), and cooling ducts. Make sure you point the ducts towards the inside of rotor so you're directing air over the vanes, as opposed to pointing straight at the surface of the rotor.
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True, drilling and slotting will remove mass and thus thermal capacity of the rotor itself, but the small amount of mass removed with slots is IMO a small sacrifice to pay during dust build-up situations.