BLOW OFF VALVES

What does a blow off valve do? Why buy one?A blow-off valve is mounted in the intake plumbing between the turbocharger compressor and the throttle plate. The blow-off valve is used as a safety measure against the turbocharger over-boosting and damaging the engine (commonly referred to as boost surge). When you're on the throttle your turbo will make a spooling noise, and when you release the gas,