Quote:
Originally Posted by NM08SRT8
If you buy rotors that were formed from solid steel in a mold with the holes built in it, you will have a more solid rotor that isn't AS weak as the drilled rotors. Like stated in another post, dozens of other car manufactures used Drilled OE rotors with no problems....
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Actually, the drilled rotors that come OE on Porsche will crack during track use just as quickly as other drilled rotors (excluding eBay junk). There's nothing magic about Porsche, Ferrari, or AMG rotors that allows them to violate the laws of physics. Drilled holes create stress risers in the iron and act as "magnets" for cracks to form around. If the rules of a particular race allow it, Porsche drivers will opt for slotted rotors in a heartbeat. The myth of the "cast-in holes" has been circulating for a long time. But those holes are machined just like any other quality drilled rotor. I think Todd at TCE even has a cash reward out for anyone who can provide photographs of a Porsche rotor mold that shows the holes being cast!
Drilled rotors do provide the best wet bite, reducing that seemingly eternal delay before the brakes start working in torrential rain. They also have a measurable increase in bite over slotted rotors and they save 1/4 to 1/3 pound of weight per rotor. So there are compelling reasons to use them on a street car that will never be tracked.