I just upgraded my 996TT with the EVO stage 1 kit (Intake, Billet DV's, GIAC software) and I am hearing a strange, not necessary bad, noise when shifting gears. I hear the noise of air being released when I take my foot off the gas and begin to shift into a higher gear. It sounds like a "whoosh" or compressed air sound. I think it is the diverter values releasing air or maybe the turbos are more pronounced with the new setup, but I am not sure. Can an EVO upgrade owner please tell me if what I am hearing is normal.

Thanks,
Marc

 

It is your V-Flow, you can hear the DV's more. Yes it is 100% normal.

 

Actually I think its the DVs (sounds like a dweeep when at higher rpms as you shift)...when I hade the DVs installed without the V-flow I had the same sound...kinda cool and normal!

 

Yep. The DV's. Now all he needs to do is to upgrade to stage 4.

 

dvs for sure neat sound no? all is well now get a europipe ....the fur is just beginning

 

Sorry, I was leaving work when I typed this.

It is your DV's. When I had a boost problem 2 years ago, the first thing I changed were the DV's (Baileys) and could barely hear the whooshing sound. After I ungraded to stage I, and adding the V-Flow, I could hear the DV's so much more. As Wross996TT said it is a pretty cool sound.

 

My TT is still bone stock and am temped to do the DVs to initiate the modding saga so to speak! Can I expect a performance difference (better throttle response, less turbo lag, etc.) with just the billet DVs even if my stock ones are working fine? Thanks.