> -----Original Message-----
> From: owner-autox@autox.team.net [mailto:owner-autox@autox.team.net]On
> Behalf Of Andrew Schmiechen
> Sent: Friday, June 28, 2002 10:45 AM
> To: Mark Sirota; eric salem
> Cc: knuckledragger@kcweb.net; Smokerbros@aol.com; team.net;
> ThoughtBoxLabs@aol.com
> Subject: Re: Slotted and/or drilled rotors for '86 Civic Si?
>
>
> That would be the legitimate reason to use rotors will holes in them. It's
> the only reason I can think of the Porsche still uses them. However, the
> holes are most likely cast in the rotor, rather than being drilled, thus
> reducing the stress in the rotor.
>
> -A.
You are correct. The "drilled" rotors supplied as OEM on P-cars have the holes
cast in them. However, they still suffer from
cracking around the holes. Fortunately, the cracks don't really get too bad
until the rotor is below wear limits anyway.
Graeme Weston-Lewis
'01 Boxster S, 95ASP.
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