Originally Posted by Andreas
Phone your local Volkswagen dealer and ask what they call the recirculating "dumpvalve". From swedish it translates to noice surpressor.
Yup, Look in the Mazda RX7 (Twin turbo) workshop manual and it also says...
DECELERATION CONTROL SYSTEM
DESCRIPTION
....
* Air bypass valve: Bypasses compressed air from after the turbocharger to before turbocharger during deceleration to prevent noise.
Originally Posted by rapidcossie
any more info on this subject would be great!
Il post a load in a bit, some of it is well over my head, but its getting that convincing that im willing to do without...