As promised, here are some before and after vids showing (hopefully audible...) the sounds of my compressor surge before getting the BOV settings/plumbing right, and after - with it recirculated and doing it's job.
Not the greatest vids, but hopefully you get the idea.
Compressor surge clip:
http://videos.streetfire.net/v...3.htm
Cruising around with it stopping the surge ("pop!"):
http://videos.streetfire.net/v...2.htm
At the end of the last clip I had to let off, it was rainy and getting sideways at the top of 2nd...
Set up is IAP kit, T3/T4, 240km/h speedometer, 11lb flywheel, and only 5 PSI at the moment!