[ QUOTE ]
dbm said:
As I understand it (and I am not a mechanic), de-restricting the airflow in the turbo system (eg changing the exhaust and cat) will help.
[/ QUOTE ]
I don't believe so.
Mine has no less lag now than on the standard stuff...the fact that the S3 runs a larger compressor wheel in a larger housing than a K03 turbo in an A3 / Golf will always mean that there is slightly more lag.
Exhaust, cats, modified airbox, modified turbo pipework, air filter etc all add to the engines response whilst not on boost...but won't reduce the lag. Not on mine anyway.
But to be honest, anyone that complaines about the lag on an S3 should go back in time and drive an RS turbo or early big turbo Escort Cossie...then it'll remind you of just how little lag the S3 really has!