Please see the following video. The noise happens about four seconds into it.

https://photos.app.goo.gl/IK9l3vhO1teK0Ogg2

It starts being noticeable over 3psi. I don't believe this is knock, but I also have no clue where it's coming from. I also thought it might be boost controller related but it happens with the unit on or off (Greddy Profec). Exhaust leak? Any ideas would be appreciated.

Thanks!

 

maybe it's my age..(getting up there) but I can't hear anything.

 

Thanks for looking! It's pretty faint.. right around the 4 second mark.

 

It is the boost control solenoid

 

Phew, thanks. It reminded me a bit of the solenoid I had on my turbo Miata, but had to be sure. I assumed the clicking would stop when I had the boost controller off, or is this the OEM solenoid (is there an OEM one?)?

 

Grandpa said it was a grenade and went and hid under the table!

 

Hard to hear it in the video but could be the turbo impeller touching the compressor housing due to a worn shaft bearing.

 

Thanks but then it would vary in speed. No variance here and the car makes boost just fine.

Cheers