ok... some more testing done earlier this week.. on a bog stock s3.. no map, no silicon tip, just a small jetex cone (not the large one I sell)
airflows.. low for a 210 S3... Not an overly healthy example of a car, but it was what it was.
logs of airflows on its as arrived condition (brand new maf element installed as it arrived with a dead one)
small jetex cone (too small !) std tip, then tried its old airbox on with its old dirty panel filter, then fitted the small jetex cone to it with 3inch tip..
best figures used for all the scenarios tested..
Headline figures (low for a 210 S3)
std rubber TIP small cone filter - 216.8bhp max airflow 164.61g/s
std rubber TIP OE airbox used paper filter - 218.8bhp max airflow 163.67g/s
3inch TIP small cone filter - 225.0bhp max airflow 169.03g/s
8.2bhp gains on like for like, std car from the 3inch TIP alone.