Seen on the old site on a thred, just wondering :dunno:
arite ok :-kSteve220 said:eh? all petrol turbo cars have DV's in some way or another :-k The evo's have a bosch re-circ job on them which is powerful but its not totally efficient.
the ONLY reason DV's are on petrol cars are due to the throttle body's butterfly valve which creates a massive pressure build up between that and the turbo impeller, putting stress on the shaft and stalling it, meaning a sluggish pick up. They're needed on all petrol turbo cars, but not needed on a derv due to there not being a butterfly valve and the engine injesting all the air created by them before its got time to build up.