[200q20v] Re: [V8] just out of curiosity (UFO question)...

Graydon D. Stuckey graydon at apollo.kettering.edu
Thu Feb 1 12:13:53 EST 2001

On Thu, 1 Feb 2001, Phil Rose wrote:

> secret guess--which I hadn't been confident enought to mention, 
> fearing jeers of derision... :-)  Chris Miller claims he's found 

What here?   Shirley you jest?

> Graydon wins (yeh, a  new S8, that's the ticket) for being first with 
> a correct answer.

Great, I'll take it in black please, or silver, or green or red.  I'd 
also be happy with white, blue or yellow.  :-)

> the caliper. Well, then that seems to tell us that Audi knew there 
> was a special "problem" with the UFO design pretty much right out of 
> the box, so-to-speak.

I'm not so sure that the little mass is an indication of a problem.  If 
it is, I'd say thatthe mass probably solved it.  I'd also predict (or 
guess) that if you wre to remove the mass, you probably would not notice 
a difference.  Its probably one of those things that is barely noticable 
unless you have scientific instruments, or a finely calibrated butt (as 
opposed to a fine butt which has been calibrated - there is a big 
difference, sometimes, _very_ big.)

> Now, I wonder if it's possible for a significant part of certain UFO 
> vibration problems to be treated by modification of that caliper 
> damping device?

See above.  I suspect that the caliper vibration is not really the 
problem that causes UFO rotors to warp.  It probably has more to do with 
coming out of warp speed too fast.

> easier to completely remove the thing and check if the problem 
> actually worsens. I assume it unscrews from the caliper body.

Try it, and report back please.  I'd be glad if you proved me wrong.

> Also, if this damper is effective (and would Audi ever do something 
> that's ineffective?)

Never!  Perish the thought.


Graydon D. Stuckey

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