Wow I've started a great debate here. Didn't mean to get an education on flutter/compressor surge/screamer pipes/etc. I just wanted to know why my SSQV being a SEQUENTIAL valve would STILL flutter at LOW rpms (sorry sticky caps lock button )

I'm used to it now and it doesn't bother me as much and weirdly...

it now only flutters on COLD STARTS

when the car is warm it will VTA 99.99999999% of the time even if I'm hitting .01 bar boost.

Thanks to everyone for the friendly and intuitive replies.

I learnt a fair bit going through the pages, especially the difference between flutter and compressor surge. That video really helped (never heard such a noise before).