Originally Posted by rmpage

Larger/heavier rotors are better heat sinks than smaller rotors, and they have a larger swept pad area for better friction. They do rob power, but the benefits of being able to repeatedly brake from very high speeds far outweigh the costs for people who choose to use them for anything beyond looks.

Originally Posted by 925tsx

HEY GUYS
i got the racingbrake slotted rotors, ordered them from heel toe.
they are insane quality! when i had them put on the mechanic called me and told me that they were one of the best engineered rotors hes saw..idk much about rotors, but here are some interesting facts about the racing brake ones. .....i believe they are cast with the holes in them, and not drilled after the fact..this is supposedly for strength.(again idk..just what i was told)
also, the fins inside the rotors are curved to dissipate more heat, they also come pre balanced from the factory, and the coolest thing yet....unlike other rotors that have the anti rust coating sprayed on them, the racingrake rotors are dipped in this coating..so precisly every SINGLE inch of them is coated..after this is done, they cut the face of the rotor. supposedly racingbrake is one of the few companies that does it this way.
i have to say, ive had mine for about 8 months now, and not one single rust mark, anywhere. im impressed, not to mention they are holding up quite well.
i highly reccomend these rotors.

Originally Posted by JTso

I can understand a larger rotor being heavier. But the blanks that my friend got were just oem replacement type. Just imagine the increased inertia and unsprung weight.

Originally Posted by waterrockets

If you don't race, the retained braking heat doesn't make any difference at all. If you do race, it still doesn't matter because you need the power anyway.