Quote:
Originally Posted by msh
He's confusing dump valve with blow-off valve 
Dump is better, without that stupid "psh-psh" sound all thime  Ok, some kids like them - "I'm the real need for speed man" 
P.S. I heared that big pressure difference can reduce life of turbo - in case of blow-off. |
No A dump valve makes the the K-shhhh noises associated with Turbos, it is a device to dump excess boost to stop the turbo stalling when you come off the gas and back on it again!
I think most VAG turbo applications from the factory run a re-circ system nwhich dumps the excess boost back into the system!