[uucdigest]        Saturday, February 26 2000        Volume 03 : Number 337



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In this BMW UUC Digest:

       [uuc] Re: GGC Autocross
       Re: [uuc] M5 & Run Flat tires

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Date: Fri, 25 Feb 2000 21:16:23 -0800
From: Randy Walters <[EMAIL PROTECTED]>
Subject: [uuc] Re: GGC Autocross

Steve Albrecht writes:

>BTW, our autox events are a really great show, and the competition is
>very tight. The top finshers in each class aren't that far apart.
>
>Gonzo Class    Jim Ochi        34.087  M3
>AAA Class      Brent Nordmann  35.267  M3
>AA Class       Peter Mottaz    35.990  318is
>A Class        John Bolhuis    38.350  325iC
>B Class        George Ribao    40.590  533i


 Wow,  that must've been one short course :-)   Where do you guys
hold your GGC events?  I met Jim Ochi briefly when i made a surprise trip
up to a two-day SFR SCCA event at  the Oakland Coliseum over a year ago.
I remember him being fast for running on street tires :-)   I'd never been
to an San Francisco region event before and was surprised that their course
was so short (45 second range),  but it was a very fun course nonetheless.
My GTi sure liked it :-)  I've never been on a 34 second course before, that
must be intense ! 

Randy Walters
89 325is
85 Golf GTi
LAX/Manhattan Beach area

http://www.sfrscca.org/solo2/Results/1998/Slush/round1.html
http://www.sfrscca.org/solo2/Results/1998/Slush/round2.html

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Date: Sat, 26 Feb 2000 01:57:02 -0500
From: Phil Marx <[EMAIL PROTECTED]>
Subject: Re: [uuc] M5 & Run Flat tires

Bill Matthews wrote:
> AFIK BMW does not offer run flats on any current model
>nor have they stated an intention to offer runflats on any future
>models, and given BMW's historical perspective, runflats would have to
>get significantly "better" before they would ever be offered on a high
>end high performance BMW.  If they ever offer them they better be an
>option I can turn down.
>
>Can this M5/runflat tire thread die now?


Apparently not.  BMW says:  The new Z8 comes standard with run-flat
technology tires in a Run-Flat Combination (RFC) system incorporating
self-supporting tires, pressure monitoring and extended hump (EH) rims.
The claimed benefit is a three hundred mile range at reduced speed (80
km/h) following a complete loss of air from any tire.  The EH wheels will
accept conventional tires and run-flat winter tread tires are available.
The tires are made up of reinforced side walls with additional inserts and
rubber compounds resistant to temperature.  The pressure warning (TPW)
system uses the same rotation sensors as the ABS system.  When tire
pressure drops by at least 30%, the tire rolling radius and circumference
changes, resulting in a change in tire speed versus the other inflated
tires.  The ABS compares this change versus average wheel speed and at
speeds above 15km/h the TPW will deliver both an audible and visual warning
to the driver within 1-3 minutes. The tires, in BMW fashion supplied by
various manufacturers, are 245/45R18W front, and 275/40R18W rear.  With the
standard RFC system tires, the Z8 is able to lap the Nurburgring circuit in
8:15 minutes;  quicker than the new M5.

- -Phil Marx
 BMW CCA #6021

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End of [uucdigest] V3 #337
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