I installed a Tial Q in my latest round of part installs. Now mind you, I never really heard one of these crack open in person.. It originally had the 11# spring which was to stiff for my vacuum. It was fluttering bad with a nasty screech sound under higher pressures. I am running GSC S2's and according to Tials spring chart, I stepped down to the white spring, 8# and now it functions the way it should. No flutter and cracks right open. However, high boost WOT let off.. it still makes a loud screetch kind of sound.. like a loud girl scream..lol I searched and searched you tube and couldn't find a similar sound... Anyone know what I am talking about? I want to make sure this is ok...


Stock 8 10.5 turbo, Tial installed with 1/4" line direct to manifold about 16" long.

Here is a vid..

 

Bump for vids.. Anyone have any input?

Here is the bov opening..


Light throttle it sounds normal..

 

sounds normal, the pitch changes due to the speed at which the air is coming out of the BOV and the surrounding areas the air is coming into contact with