Are Cross Drilled and Slotted Rotors worth it?

Coreyned said:

Im not that sure about this but it keeps the brakes from warping from getting too hot, if you race alot then you use your brakes alot to get back down to speed. go like 50 mph and brake down to zero and feel your brakes

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Negative. That's all just clever marketing.

Cross-drilled rotors evolved in the early days of racing when pads used to expel gases when heated up. The gases would push the pad away from the rotor face and hurt braking. To give the gas somewhere to go, engineers came up with drilling holes in the rotors. They have nothing to do with cooling. The airflow flows across the hole, not through it. Duck into an alley between two buildings on a windy day and you'll see what i mean. There is vitually no airflow through them. Modern exotic race cars today still use pads that expel some gas, so that's why high end cars have them.

Blank-faced rotors are the best for performance. Reason being that without anything drilled out of them, the rotor has more mass. Mass is what absorbs heat, and the more mass, the more evenly distributed it is over the entire surface. Take away some mass, and what's left needs to absorb the heat that that missing portion would have absorbed.

Drilled and slotted rotors are just for impressing people when you are stopped at a traffic light on the average everyday street car.


Best rotors for the Mustang in my opinion, solid faced Brembo blank rotors