anyone ever experience s5 wastegate flutter on decel??
I ported mine and receintly noticed a rattling noise coming from the turbo.
while installing my new corksport sys I inspected the turbo and found the wastegate flapper loose and rattling.
with this new exhaust on its very noticeable. is this common????

 

Something is broken. That wastegate should be held firmly closed anytime there's no boost. You'll be loosing boost response because of a leaking wategate.