I was told that Porsche rotors are cast with the holes in place rather than
drilling the holes later. They are "pseudo-drilled".
At 07:32 PM 6/26/2002 -0400, datsunmike wrote:
>Supposedly its main pupose is for outgassing of the pads which is no longer
>true (pads haven't had that problem in almost 30 years) BUT they are also
>used to dissapate water in wet conditions.
>
>Personally I think its another kind of snake oil and just looks better if
>you like that racy look. However I could be wrong.
>
>Grassroots had a long article about brakes and in particular a long
>discussion about rotors. They said what I feel but maybe what I feel came
>from their article as well as others.
>
>Those drilled rotors are particularly bad unless manufactured by a very
>reputable company and even then you have to keep your fingers crossed. I
>have heard of several stories about the rotors cracking under pressure as
>the holes caused stress risers. Yes, Porsche uses them but those are Porsche
>parts made under strict guidelines.
>
>Mike
>
>----- Original Message -----
>From: "Ed Wilsey" <Kensington_FC@hotmail.com>
>To: "Stephen McCartney" <sgam@hotmail.com>; <roadster@texoma.net>; "List"
><datsun-roadsters@autox.team.net>
>Sent: Wednesday, June 26, 2002 10:26 AM
>Subject: Re: Question about front disc brakes
>
>
> > What is the purpose of slotted rotors? Is it for heat dissipation?
> >
> > ??//
> >
> > ----- Original Message -----
> > From: Stephen McCartney
> > Sent: Wednesday, June 26, 2002 3:58 AM
> > Subject: Re: Question about front disc brakes
> >
> >
> > Even the guys who race here are using a more or less stock setup, except
> > with slotted rotors (still available here in Australia through DBA). Get
>more
> > from the Web. FREE MSN Explorer download : http://explorer.msn.com
> >
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Adam Bradley
'70 Datsun 1600 Roadster SPL311-28181
'66 Datsun PL411 sedan PL411-022447
http://www.picturetrail.com/abend
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