Tire Width & Boost Threshold

Phil Rose pjrose at frontiernet.net
Wed May 29 01:41:52 EDT 2002

At 10:51 PM -0400 5/28/02, Brett Dikeman wrote:
>At 10:07 PM -0400 5/28/02, Phil Rose wrote:
>>At 3:55 PM -0700 5/28/02, Justin Olson wrote:
>>>With a stock chip, at what rpm can you get 1.8bar in
>>>4th gear. Here is the how I tested; getting on the
>>>freeway at 2000 rpm's in 4th gear, I floor it. My car
>>>makes 1.8bar by ~3000rpms. What do you guys get?
>>That's Audi's official "max boost" test. You passed! Though you don't
>>need to do it on a freeway :-)
>Nope.  Official test(I've had it wrong for years) is 3rd gear, not 4th.

Oh really? Nope, it's 4th gear! You should have quit while you were
ahead. Read pages 21.27 and 21.28 (vol.1) in the Bentley manual. It
states (and I quote directly from text):

"accelerate vehicle in 4th gear starting at approx. 40 mph using full
throttle while watching vehicle tachometer
	*at 3000 rpm, push  M button (memory) on tester
	*based on altitude, display must be:

altitude in meters		bars
-------------------	---
Sea level to 1200 m		1.825
etc, etc

end of quote

Perhaps in some other place the Bentley says to test in 3rd gear, but
I've never read that.

Phil Rose
Rochester, NY
mailto:pjrose at frontiernet.net

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