Chip PT Pressure Transducer Question ECU

[Brandon Rogers]

FWIW - I've got an Autometer vacuum/boost gauge plumbed in - it shows about
11 psi vacuum at idle and about 16-17 psi vaccum under decel, where anything
less than Atmosphere is considered vacuum.  Hopefully that makes sense.

Brandon

----- Original Message ----- 
From: "Ben Swann" <benswann at comcast.net>
To: <suffolkD at aol.com>
Cc: <quattro at audifans.com>; <200q20v at audifans.com>
Sent: Wednesday, November 10, 2004 7:08 AM
Subject: Re: Chip PT Pressure Transducer Question ECU


The recalibrated PT will show less than actual boost.   You need to plumb a
guage in - tee in just prior to the ECU port.

Ben

[Date: Tue, 9 Nov 2004 23:20:18 EST
From: SuffolkD at aol.com
Subject: Re: Chip PT Pressure Transducer Question ECU
To: 200q20v at audifans.com, quattro at audifans.com
Message-ID: <111.3cc0a7d5.2ec2f102 at aol.com>
Content-Type: text/plain; charset="US-ASCII"

Minhea chip question.

The ECU now has a modified PT.
So when the car had the stock PT setting the dash showed 1.8 bar at "full"
boost.

Mine had leaks and issues which a few of us focused on and fixed/repaired.
Now the Chipped ECU only reads 1.6 max no matter what (it was 1.3-1.5 in the
past)
Yes 93 octane fuel used........

Q:  WHEN the PT is "recalibrated" does the dash display read lower because
of
the mod/recalibration?
So 1.6 = 1.8/9 stock?

Also, where would the best place to T into the vacuum lines for a VDO boost
gauge?
By the ECU not optimum?

I've been told chipped cars read 0.9 at start up, but my old 10V avant
showed
0.9 non"chipped"..........even 0.1 under vacuum deceleration.
TIA - Scott by BOSTON]
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