Quote:
Originally Posted by e90_DriftStar
The BOV is Basically just for the blow off sound
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Misinformation...
Yes is makes the blow off sound. Yes the stock diverter valves currently hold the boost we are pushing. But they will leak if you have tuned your car up to 1.0 bar over an extended period of time. They were originally designed to deal with 7-8 psi which is basically 0.5 bar. What these devices do is eliminate(hopefully) compressor surge. Which is something that can instantly damage your turbos. BOV's blow into the environment. DVs recirculate the air back into the system, the amount of air the DVs recirculate is like a grain of sand on the beach but I guess in some peoples mind it is better than none at all.