Exploding Rotors: why you do not drill

[Brett Dikeman]

At 7:41 AM -0400 6/20/03, Bob Rossato wrote:
>Not to start a thread on pros and cons of drilled rotors but, it is
>obvious that these rotors were a home made job.  There is a rudimentary
>pattern to the holes but the spacing is all over the place and the holes
>look bigger than anything else I've seen.  I'm not defending drilled
>rotors but the reason these exploded has a lot more to do with the fact
>that some clueless individual just went to town on them with a drill
>press without any regard to the size of the holes, amount of material
>removed, or balance of the rotor.  If someone is actually selling these
>things in this condition then that is downright criminal.

They were Zimmerman rotors, made in Germany; not a homemade job.
Their rotors seem to be widely sold by VW/Audi/Porsche 'performance
shops' on the net.

In person they appeared to be drilled in a perfectly even pattern,
consistent hole size, so on etc.  Also, if they were not balanced,
one thinks the TT owner would have noticed immediately at 120+ mph on
the front straight.

B
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