200 boost

[Phillips, Kevin]

The correct readings are around 1.2-1.3 under hard acceleration in 2nd/3rd
gears. With engine off and ignition on you will see 0.9-1.0 i.e. one
atmosphere. On deceleration it will drop to 0.2-0.3.
Remember in a normally aspirated engine under hard acceleration you would
see a large vacuum so the fact that you see any pressure over 0.2 means the
turbo is blowing like the wolf in the 3 pigs story.

Kevin Phillips  1990 200TQ, 1995 900SET.
BARCO Graphics Integration Team
40 Westover Road
Ludlow MA 01056
kevin.phillips at barco.com

 -----Original Message-----
From: 	Michael Pederson [mailto:mlped at uswest.net] 
Sent:	Wednesday, November 15, 2000 23:36
To:	Beatty, Robert; quattro at audifans.com
Subject:	RE: 200 boost

Rob -

Does the gage read "1" or "0" when you turn the car's electrical system on?
If it reads "1" with the ignition on, but the engine off, I'd agree with
you,
but if it reads "0" then I would think at 1.2bar the car's gage is showing
absolute manifold pressure, i.e. actual boost.

Shouldn't be too hard to tell if cross checked with a SOP gage ("seat of the
pants.")
The difference between 17+ lbs of boost vs. a little less than 3lbs is
something
most of us should be able to feel in the small of the back.  My memory
begins to
fail me, but I thought when my old 91 200TQ's gage got to .8 I was seeing
some
improvement in forward motion.  Unfortunately the Audi dropped the dash
boost gage
display, along with the rest of the trip computer functions in 1993 on the
Urs4's.

-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of Beatty, Robert
Sent: Thursday, November 16, 2000 3:14 PM
To: 'cobram at juno.com'; ckrug at laf.cioe.com
Cc: quattro at audifans.com
Subject: RE: 200 boost


Dont forget the 1st 14.7 lbs of your 17.4 is ambient air pressure at sea
level so in effect he has 2.9 lbs of boost... which isnt much.. :)

Rob