Blitz Blow Off Valve
The Blow-off valve (BOV) is important to all turbocharged vehicles in order to relieve
compressor surge without reducing compressor speed. The BOV controls boost pressure that is built up by
the turbo by venting it to the atmosphere in between shifts. This prevents pressure from backing up into the
compressor housing, causing the turbo impeller blade to rapidly stop or to spin backwards, which can be
destructive to the turbo. A blowoff valve is actuated by pressure changes only, ensuring quick valve responses
and complete closures at idle. The BLITZ blow-off valve not only improves performance and response, but also
increases the life of the turbocharger.