Quote:
Originally Posted by 8POT
the idea is that if you are sitting at the lights with your brakes on the disk will not cool down evenly (where the pads are touching) and cause it to warp.
Manual cars don't need the brake on constantly to stop the car from moving.
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I can see where the theory comes from, but I don't think anywhere that you're waiting at lights, you're going to be getting your brakes hot enough to cause that kind of damage anyway.
If your brakes are getting hot enough to warp between street lights, there's got to be something else going on.
I decided to check my own brake rotors with a thermal camera after a 40-minute drive (highway followed by town driving) one day and they were no hotter than 70°c, and even then, that was from the internal vanes of the rotor. Turns out that ventilated brakes are actually really efficient at transferring heat away from the friction surface.