by Pat Goss
So you want some racy cross-drilled or slotted brake rotors? But do you really? After learning the pros and cons of glamour rotors
most drivers decide not to spend the extra money. The positives of slotted and cross drilled rotors are mostly great looks when the car
is standing still. They may also have some advantages at the track — but even that’s limited because slotted and drilled rotors have
more negatives then positives when used with modern ceramic based brake pads.
Specialty rotors do not make a car stop in a shorter distance because what actually controls how well a car stops is its tires. As long as
the brakes can lock up they’re doing all brakes can do. Drilled and slotted rotors may actually increase stopping distances because
they reduce the contact area between the pads and the rotor surface. More holes less rotor surface for the pads to grab. But do the
holes help dissipate heat? No!
The rotor is a metal heat sink that dissipates braking heat. Drill holes in the rotor and you reduce the amount of metal to absorb and
dissipate heat. More holes less heat transfer. Some say the holes create air cooling — WRONG! Metal transfers a lot more heat than
air. So — if you want the look buy drilled or slotted rotors but don’t buy them thinking your car will automatically stop better.
© Copyright 08/19/16 Pat Goss all rights reserved