Re: Help with BLOW-OFF Valves.
Blow-Off Valves have one goal, prevent compressor surge. Compressor surge occurs when the throttle plate of a turbocharged engine closes and the pressurized air is forced back into the turbocharger’s compressor housing causing the turbo to slow down. Compressor surge not only decreases the spool of a turbo but can also damage its center cartridge.
However I think there are BOV sound module available in the market, the purpose basically telling people that you have a snail in your car!!!
I guess till date only the 335i will need a BOV, no other BMW model need them unless they had modified the engine.