Ok, My type S will make an odd sound, like a fluttering, when I ease of the throttle at partial boost. (i'm on a T-25) It has been getting a little worse lately (or maybe i'm just driving more conservatively), but question is:

Do these valves make a "fluttering" sound under partial boost, or is this surge? I think I surged the turbo once when I was tuning the boost controller, and it was a very deep like "dunk dunk dunk dunk"...am I just being a worrywart about this flutter?

Thanks!
Vandy

---------------------------------------

Black 98 GST missing her owner and looking for a new one...Inquiries welcome