Upgrading Brakes Question

GDS-3950BH wrote:
Let me get this straight. Drilled and slotted rotors are bad because they have less metal? I guess some people have weighed brand A and B slotted and drilled, and compared those to brand D and C non slotted and undrilled, for the same application?

ROFLMAO.

Before laughing at someones post, you really should do an on-line search for a detailed explanation but yes, there is a difference. And yes, "people" (race teams, engineers, etc) have expeirmented with different styles of rotors in every application you can imagine including aircraft. That's why one vehicle comes with one type and another comes with the other.

I'll try to do a brief explanation.
Brake pads gas when they get very hot. Those gasses cause the pads to lift slightly from the surface of the rotor - reducing effectiveness. This is where slotted and drilled comes into play. They trade having less surface area (so less braking) for the ability to get rid of these gasses and allow the pads to press on the rotor harder.
Since gassing hasn't had a chance to develope during a single hard stop, it is thought that solid rotors have better initial braking becasue this gassing condition doesn't come into play. So something like a truck doing a panic stop will in threory, stop better during that single emergency application.
Now a truck that is hitting the brakes many times without being able to let them cool may enjoy the benefits of drilled slotted rotors. So there's an argument for them there as well.