|The Blow-off valve is essential to all turbocharged vehicles.
The purpose of this Blow-off Valve Dual Drive is to relieve compressor surge
without reducing compressor speed. It controls boost pressure that is built up
by the turbo and vents it into the atmosphere when the car is not under load (in
This prevents pressure from backing up into the compressor
housing, causing the turbo impeller blade to rapidly stop or even worse, to spin
backwards (compressor surge or backspin). Doing so can be potentially
destructive to the turbine wheel and shaft. Repeated stress over time can cause
eminent damage to the turbo charger and eventually lead to turbo failure.
A blow off valve is actuated by pressure changes only, ensuring
quick valve responses and complete closures at idle. Thisblow-off valve not only
improves performance and response, but also increases the life of the
Mitsubishi Evo 7 8