Originally Posted by tabetha
Pretty much all oe cars(turbo) have them as std WHY.
It prevents turbo stall, allowing faster spool up, and sounds awsome IMO, not to everyones taste though.
tabetha
You'll find VW/Audi cars have them listed as a noise surpression devices. It has fuck all to do with preventing stall and everything to do with people buying road cars not really wanting their car sounding liek a flock of pigeons everytime the throttle is closed.
In all my years playing with turbo cars I have never once seen a failure as a result of not having a dump valve fitted. Escort RST and Fiesta RST don't have them as standard either.
Make no mistake, on an RST you are buying nothing more than a noise