Sure... but... according to this expert article, rotors do not
"warp" - they merely accumulate brake material unevenly or
develop hard spots made of cementite.  Very small amounts of
said substances translate into vibrations when braking.

I highly recommend reading it:

http://www.stoptech.com/tech_info/wp_warped_brakedisk.shtml

--- Bruce Nadig <motorbruce@HOTMAIL.COM> wrote:

> No experience with the SA Big Brakes here, but here is one
> other interesting
> note.
>
> The times that big time race teams have the most brake rotor
> problems is
> during testing. Typically a car will go out, run some hot
> laps, and return
> to the pit for a debrief. The car will then go out for a few
> more laps, and
> once again return to the pits. This can be repeated over and
> over all day.
>
> What the brake discs are seeing is massive heat cycling. The
> hot laps get
> the discs glowing hot in many cases, and then the cars come
> into the pits
> where there is no cooling air running over them as they sit.
> The cycle is
> repeated again and again. So, what the teams see is repeated
> massive heat
> cycling on a large scale with periods of stagnant non-cooling
> air during pit
> stops.
>
> Repeated heavy heat cycling can warp rotors. In real world
> conditions this
> can mean driving over numerous passes, building heat, and then
> having
> insufficient time to cool properly.
>

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