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Old 05-21-2011, 01:19 AM   #31
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Join Date: Feb 2008
Location: Philadelphia
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Originally Posted by OrientBlau View Post
There's blank (standard), drilled and slotted.

Blanks work the best. Period.
I think a 2-piece floating drilled design (like the 330 performance rotors and the rotors found on newer M-cars) would probably be better than single-piece blanks. The floating design allows for lesser weights and for lower overall brake temperatures. Both factors lead to better brake performance. While a blank floating rotor might be even better, they're not exactly common. I don't think any BMW has come with blank floating rotors since the E39 M5.

I don't think cracks will be a significant concern on a well-designed rotors. You don't really hear about the newer M cars cracking their rotors all the time.
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