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

my type s would make the flutter when you ease off throttle at low boost and a swish if you got off quick. I believe this is normal.

Yeah the flutter is pretty normal. alot of the adjustable BOV's will flutter a bit after letting off partial throttle, so don't worry. If you get the heavy chugg,chugg,chugg sound then you have your surge.

sweet thanks guys, check off one less thing I have to worry about on my list of about 109238479231-947......

I wish I had things to worry about but until I get several thousand dollars, I have no car issues to speak of. But, best of luck to you. Hope all goes smoothly.

hook up that second nipple on the Type S to get rid of the partial throttle flutter.

Originally posted by Skillionaire
hook up that second nipple on the Type S to get rid of the partial throttle flutter.

it helps a little but won't totally get rid of it. Just stop driving "conservatively" and no worries. }(

yeah I like "plan B" better.... }(

Thanks again guys, as always, YOU RULE

I think the flutter sounds badass...

seconded