i know this an old question but i'm goin nuts here
before i added a evo fresh air piping (that goes to the turbos) i had that great wooooosh sound when i shifted and now it's gone.... am using forge dvs and they woosed before . hooked up a computer to the car and it sez the dvs are working but no woosh checked all hoses greased the dvs but still no woosh. this worries me because i blew a turbo after 8000 miles some say if the dvs arn't opening this will cause stress on the turbos...so to make it short no leaks computer sez the dvs are working just can't hear them as before the change appeared when i installed the evo piping. any ideas would be helpful thanks in advance steve

 

get straight pipes and you wont have to worry about it








in a seriousness did you call evoms?? did u try putting the stock boost hoses back on? did you replace the f hose that connects to the dvs with the evoms silicone one?

 

called evo they thought it was a vacume leak. not the deal replaced all the hoses the computer sez they are working but the just don't make any sounds at all

 

I'running EVO"s and they woooosh just fine. Also running 100 cell cats.

 

what mods do you have done to your car??

 

euro pipe, kevins k16s, evo piping to the turbos, evo air box, forge dvs, giac flash ss kit, hoses, s cargo headers, and some stuff i forgot, the key the sound went away when i replaced the stock piping to the turbos with the evo stuff which workes way better. the computer sez the are working but where is the noise

 

chuck have the 100 cell cats also and mine woosed also till i made the evo piping change

 

put the stock piping back on and see it it comes back! or change the battery in your hearing aid

 

the computer cannot tell id the dv are working.. all it knows if the solenoid that controls the vac to the dv is working...nothing else

 

or change to a blow through setup and get twin tials and then u will really hear the whoooosh ! lol

 

it''s not the on board computer it's porsches new wam bab deal . took old dvs out they opened and closed with ease . well they were not sticky

 

yep all the hoses are evo theonly difference is the pipe change and i have no vacume leaks . am gonna sleep on this ans see if any pops up in the am thanks for the help...

 

Steve,

For whatever reason it's normal, as several others have experienced the same thing. My car did the same after the 3" Evoms fresh air intake pipes were installed. I had an enjoyable woosh sound that diminished greatly after the Evo pipes were installed. I can still hear it, but nowhere near as loudly. The Evo pipes are pretty thick vs. the OEM tubing. It may be that the heavy wall thickness of the Evo pipes acts as sound insulation, therefore, they do not transfer as much sound through the firewall.

 

john thanks it was driving me crazy however the guy at evo say it should be louder. my quest goes on