Simplest way to get some flutterin'
1) Put on a pod filter (if you haven't already got one)
2) Remove your standard BOV and make a plate up to block it off
3) Crank up the boost to say 10PSI
4) With a bit of practice, you should be able to hold flutters for up to 5seconds!!!
Happy flutterin'
DISCLAIMER:
1) Your car may/will stall as the air will be forced back through the turbo and back where it came from; your AFM will go insane hence causing a sudden "drop" in RPM and stalling. Even does it on an auto!
2) Your turbo may/will die - If I spun you 10,000rpm one direction, then hit you in the opposite direction with a baseball bat, you'd die too
Stan