Ford Focus RS MK3 Blow Off Valves - Automotive performance parts direct
A blow-off valve or dump valve – more commonly known as a diverter
valve or recirculating valve in recent years – is a valve built into the
compressed boost side of the turbocharger or pipework to allow excess
boost pressure to escape from the turbo system when coming off the
throttle. we carry brands like forge motor sport, turbosmart , GFB, GRIMMSPEED, HKS & TURBO XS
Many older-style BOVs work by a vacuum line, which allows the piston to open when the throttle is closed, which in-turn releases the pressurised air. Instead, modern cars are now equipped with electronically-actuated BOVs mounted directly to the turbo compressor housing. This relieves pressure on the turbo itself and stops any excessive surge while allowing the turbine blades to continue spinning, resulting in greater longevity for the blades, shaft and bearings; it also allows for marginally quicker spool up between gearchanges and throttle application.
