yer that one of that dual charged mk2 on the track is seriously naughty. read what matey who was in it said, the noisey irratic running/driving of it is because the supercharger is taking the lag up then when the turbo boosts up it swapes to turbo,
like the tsi mk5 you have now. i rekon thats why the TSI is harder to tune, the video proves it
once it changes to turbo is narf go!