I thought the whooshing noise was normal? I have noticed it more since I got my Revo Stage 1 a few weeks ago and was advised by the Revo dealer that I the car was not making full boost and this was more than likely down to the DV valve. I purchased the new 'G' valve from the dealer and I am getting it fitted today so hopefully when I take it to JKM on Friday the will tell me I am getting full boost. I will take some pics of the old valve and post them here later.
On the same note, I have noticed that since Revo Stage 1 between 3000-4000 RPM I am getting a whining noise, I think it’s the turbo or might even be the DV valve on its way out. Any one else had this?