Quote:
Originally Posted by SubieNate
http://www.s2ki.com/s2000/topic/1012964-2piece-rotors/
@ AZFA20-Happy?  There wasn't a ton of info there either. I've been researching 2-piece stuff lately as I'm interested in some of the 2 piece options for the stock calipers as well as a potential upgrade to fixed calipers and I want to know all I can about how they work and the potential problems before I do anything.
I'm pretty sure brake rotors are heat treated from the factory correct? You're probably right about doing sets of heat cycles before really hammering on them, but this is a kind of failure that I feel should basically NEVER happen. It's one thing to microcrack or warp a rotor. It's another thing to have a rotor completely SEPARATE from the hat. That's just plain dangerous. The parts should be designed so that the margin of safety is high enough on that portion of the rotor that it's an extremely unlikely place to fail first.
I'd be more than happy to have Wilwood step up and talk about this, that's kind of the point of the thread. Brakes are an item of utmost importance when it comes to safety and unless something was blatantly done wrong in this case, this is a safety issue.
Cheers
Nathan
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Nathan, I hope you didn't take my need for info as a personal attack. It wasn't I assure you :happy0180:
I agree brakes are a very critical component but I also know that things often times fail not necessarily due to a design flaw. By no stretch of imagination am I saying there may not be a design issue but I just know how these types of threads scare people from certain brands based on one failure they observe via a single picture or freak incident. I actually personally own the same style Wilwoods on one of my cars (I understand these are specific for the car in question but Wilwoods are basically parts bin brake kits) so this failure is something that directly concerns me too. You won't see me necessarily worrying about a failure though without more info. I would love to see Wilwood address this particular failure myself to be honest but perhaps through constructive conversation we can figure it out
As far as the heat cycling from the factory, yes they usually are but remember these are two-piece rotors so the same friction surface is used for many vehicles which each produce slightly different heating characteristics. The rotors should always be seasoned if used for racing.