[200q20v] 200/20v at speed

[Chaplen, John]

Stock on the car is rated at 149mph, I can see that a chipped car could
reach 155 with a little more to go...maybe 160 but prob not much more...

   John Chaplen CNE
   William M. Mercer, Incorporated
   Portland, OR, USA
   mercer.com
   www.wmmercer.com


-----Original Message-----
From: Bruce Boeder [mailto:BBoeder at BoederLaw.com]
Sent: Friday, July 27, 2001 10:57 AM
To: 200q20v at audifans.com
Subject: [200q20v] 200/20v at speed


I note with some interest the recent thread on top speeds, etc.

I'm curious if you are doing your measurement with radar guns or something
other than relying upon speedometers.

Speedometers, IMHO, are notoriously optimistic about speeds, particularly if
you are running a non stock tire.

When we've tested speeds using radar guns at the Porsche club events that
I've attended, we've been surprised at how low the top speeds attained are.
However, when we've compared them with a mathematical calculation of speed
versus rpm in a given gear, the results have agreed with the radar gun.

Not to say that listers aren't attaining 155 mph or whatever, but I doubt
that an indicated 155 is anywhere near a true 155.

Bruce Boeder

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