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Re: Slotted or X-drilled? best rotor for the E-30 (archive)

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Posted by Dave on May 31, 2002 at 00:12:02:

In Reply to: Slotted or X-drilled? best rotor for the E-30 M3.. posted by Highrever on May 29, 2002 at 17:10:19:

I read an article a few years back that discussed this matter. I remember the article saying that unless you race your car, you don't need slotted or cross-drilled rotors. It went on to say that under heavy braking during track conditions the brake pads and rotors become so hot that a gas layer is formed between the pad and the rotor while braking, substantially reducing brake effectiveness. It said that slotted rotors are more efficient at expelling this gas layer than cross-drilled rotors. But, the article also stated that under normal street use, brake temps normally don't reach the point where this gas layer forms, therefore, no need for slotted or cross-drilled rotors for street use. They'll look cool on your M3 though!

Dave



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