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Why aren't cross-drilled rotors a wise choice to replace stock rotors with again?

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Old 01-16-2006, 06:40 AM
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Why aren't cross-drilled rotors a wise choice to replace stock rotors with again?
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Old 01-16-2006, 06:42 AM
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Default from what i've heard.......
unless they're cast as a cross-drilled rotor then they have more of a tendency to crack than a plain or slotted rotor.

Anyone confirm?
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Old 01-16-2006, 06:43 AM
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Default I've heard that too, plus they cost more $$
So, why would you pay more for something that cracks more readily than stock
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Old 01-16-2006, 06:46 AM
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Ditto, they need to be cast with the holes.
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Old 01-16-2006, 06:47 AM
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Default All of my friends have had cracking problems with theirs...
Well...except for those silicon carbide brakes on my buddies GT3...:P

PS...YGM, you show up in the March 06 issue of EC
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Old 01-16-2006, 06:48 AM
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Default GT3 would be cast though i'm guessing?
<looking for mail>
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Old 01-16-2006, 06:52 AM
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Default My understanding as well... ok for street, not so good for track heat cycles.
I like mine as they keep the dust off the outer wheel portion... most of it hits the inner wheel area, wheels stay clean longer even with dusty pads. I don't track this car fwiw.

<img src="http://pictureposter.audiworld.com/3027/frnt_brake.jpg">

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Old 01-16-2006, 06:53 AM
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Default I'm not sure...
did you get the email?
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Old 01-16-2006, 06:53 AM
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Default Yes, and even cast that way you may have as much as 3X the residual stresses in those edge locations
vs. anywhere else in the material. i shudder to think stress concentrations in drilled rotors.
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Old 01-16-2006, 06:55 AM
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Default nothing yet......
@buehnengineering.com?
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