quattro digest, Vol 1 #2480 - 16 msgs

[Jon Linkov]

You're correct. I was at the Factory for business this past January. Part of
the business was a private tour. And the tour guide (not the standard guide,
but an executive) confirmed the hols are drilled. The venting "vanes" are
cast, and there are small indentions cast into the rotors for where the
drilling should take place, but the holes ARE drilled.

Jon
njconn at email.msn.com
http://www.quattroclubusa.org/r/potomac

> -----Original Message-----
> From: Greg Johnson <gregsj2 at home.com>
> Chris
>
> Still commonly accepted.  In fact the website of one the "big
> brake" pervey=
> ors says: "Holes are4mm diameter as opposed competitor's units
> with drilled=8mm holes which are more prone to hairline cracking
> underrepeated heavy braking applications. {Porsche is the only company
utilizing a special casting process where they form the holes in the mold
which precludes disturbing the metal grain flow during the drilling
process}."
>
> Greg Johnson
>
>>