07-20-2004, 12:08 PM
mykel Wrote:Actually, drilled rotors are meant to dissipate heat. Slotted rotors are meant to dissipate brake dust.
Drilled rotors do not dissipate heat faster.
If anything, they reduce the thermal capacity (the rotor is a heat sink) of the system because there is less mass available to absorb heat from the pads, and transfer it to the air going through the rotor (convection).
Again, Drilled rotors do not dissipate heat faster. This isnt a theory, or a guess, this is hard fact. I can go further on why if you want, but its a dead, beaten, bloddy, rotting horse.
Quote:Although they don't wear down, they do warp if you get crap ones. Get good ones so you can hold the brakes on full at 100+ and not worry about wobblies
Wobbles? If it feels like a warped rotor you have a material transfer problem.
Most drilled rotors are crap anyways, and are drilled after heat treating, which creates stress risers, and they crack in short order.
To answer your next question of "why do Ferrari/Porsche/etc use drilled rotors", Porsche uses them for better wet braking performance ( <!-- m --><a class="postlink" href="http://content2.us.porsche.com/prod/911/turbo04.nsf/usaenglish/safety_aerodynamicsbraking_system">http://content2.us.porsche.com/prod/911 ... ing_system</a><!-- m --> ) and the rest, well if you're spending $200k or more on a car it better look cool.