xud wastegate flutter

[CJ_Derv]

Ahh, ive been running last few days without the air filter connected from above intake manifold. it sounds as if it has a quiet dump valve on when releasing throttle and if i give it some stick early in revs and let off you can hear this 'chatter'

I dont really like it as i know its not healthy, but given it is defo noticable when air filter isnt on but wouldnt recommend this, even though it is a head turner bigger turbo needed