RE: [DMCForum] Cross-drilled rotors was Door strut strength?

["Travis Goodwin" <tgoodwin@xxxxxxxxxxxx>]

Thanks for the heads up Walt. The more I think about it, high performance
rotors may not make a lot of sense in my case. I'm a weekend driver and
travel less that 100 miles a month. So, PowerStops wouldn't make a whole
lot
of difference in my case. Maybe I'll just go OEM and make the transition
easier (and less expensive). 

> -----Original Message-----
> From: Walter Coe [mailto:Whalt@xxxxxxx]
> Sent: Thursday, May 15, 2003 4:01 PM
> To: DMCForum@xxxxxxxxxxxxxxx
> Subject: Re: [DMCForum] Cross-drilled rotors was Door strut strength?
> 
> I ordered PowerStop cross-drilled rotors though SummitRacing who got
them
> through AutoSpecialty.  Only the front rotors came and the back ones
went
> on
> back order for months.  I finally played detective and spoke to the
> relevant
> people involved.  Their supply of cross-drilled rotors ran out, and they
> sold slow enough that they were not planning on making any more.  At
that
> time they had two more pair of front rotors and no rear rotors.
> 
> SummitRacing offered to buy back my front ones, but I decided to try
them
> out on my car anyway.  In short, they suck!  My only complaint is that
> they
> are very noisy but then I'm the only one complaining about PJ Grady's
> shock
> absorbers with the high-performance squeak.  These brake rotors make a
> whirring noise any time the car is in motion even without touching the
> brake.  It isn't bad enough to make me replace them, but I certainly
> wouldn't put the same kind of rotor on another car.  Rob Grady told me
> that
> he test drove a DeLorean with cross-drilled rotors and didn't want to
deal
> with them because of the noise issue.
> 
> One important caveat: not all cross-drilled brake rotors are created
> equal.
> The PowerStop ones I got were made to be cross-drilled.  After the
> drilling
> process, they were reheated and then zinc plated.  The holes are
chamfered
> (like funnels) which are supposed to cut down on the noise, but they are
> still very noisy.  John Hervey told me that the ones he got were not
> cross-drilled and then he had someone do the cross-drilling expost
facto.
> I
> wouldn't want to trust it, but then maybe John would like to chime in
and
> explain what he has.  I think the reason why he doesn't want to sell the
> fronts or rears separately is because he had them made in complete sets.
> If
> he sold just the fronts then he might have a harder time selling the
rears
> separately.
> 
> The cross-drilled rotors I like best are sold by Ed Uding.  He had them
on
> display at the Memphis show last year.  This is a much thicker
internally
> vented rotor that he then cross-drills.  I don't like the idea that he
> cross-drills them expost facto.  But I do like the idea that they are
> internally vented.  This should stop most of the whirring noise.  Can
> anyone
> who has tired them say?  These rotors are too thick for stock calipers,
so
> Ed came up with an adaptor piece that goes between the halves of the
> caliper
> making it wider.  What a clever guy!
> 
> Walt
> 
> 
> 
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