Wood

Not the turbos, sounds like vacuum or something else. Any ideas?

vrsix

Under what conditions?

Wood

3K RPM, 2/3 gear, slight decel

S-Curve

That would be a normal turbo sound if it's reproduceable every time

vrsix

I understand it's created by the bypass valves opening and closing quickly as they release boost, boost builds up, they release it again, etc.. Totally normal.

It's a very faint noise and I can only hear it when I'm slowing to a stop.

frank

Actually, I think it's the wastegate flaps fluttering...but same diff....it's normal