[s-cars] wastegate adjustment questions

[Mark Strangways]

You should find that if you have the spring wound in too tight, you will,
a) overspeed the K24.
b) remove some or all of the computers ability to modulate the boost with
respect to engine operating parameters.
c) find a very snappy crisp tip in, but it will run out of breath and not
have any further build up of power sooner.
d) in extreme cases cause the computer to go into limp home mode due to the
overboost condition.

Don't as me how I know, that much I am sure is obvious :)
I HAD TAP Stg 3 software and was told by Igor to unwind the wastegate spring
so it was only 2 1/2 turns from just engaging the spring tension. If it was
wound too tight even by 1/2 a turn, I would have to reboot the ECU, and at
so point back off the spring and then RESET the ECU. Got so bad that I put a
button on the dash to reset the memory.

Mark S
----- Original Message -----
From: "Rokas Reipa" <rokas at wam.umd.edu>
To: <s-car-list at audifans.com>
Sent: Thursday, October 23, 2003 4:04 PM
Subject: [s-cars] wastegate adjustment questions


> Hey everyone. Wasn't happy with my car's performance lately; it seemed out
> of tune and not as fast as it should be. Decided to try adjusting the
> wastegate last night as well as replace the o2 sensor. Turned the screw
360
> degrees clockwise and went out for a test drive. Wow. Car has been totally
> transformed, from merely quick and sometimes lethargic to a proverbial
> screamer. Turbo spools up MUCH sooner and quicker now. It is especially
> ridiculous on the highway, where 1.5 inches of gas pedal travel produces a
> tremendous rush of acceleration. In third gear, I saw a maximum of ~21lbs
of
> boost; I could only muster about 16 before. While I am enjoying this to
the
> utmost, the prospect of turbo or other component damage really worries me.
> The car has a Stage 1 TAP chip in it and an adjustable wastegate, stock
K24,
> nothing else. Did I turn it too far? Should I turn the wastegate back a
bit?
> What is the optimal setting for these things? The change is amazing and
> addicting but at the same time I keep worrying...Thanks,
>
> Rokas
> 95.5 S6
>
>
>
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