Hi, I have a 1998 Toyota Starlet Sportif, and i was wondering if anyone could tell me what a BOV blow off dump valve is? and whether it would do anything to my cars performance. Thanks
A blowoff valve is connected by a vacuum hose to the intake manifold after the throttle plate. When the throttle is closed, the relative manifold pressure drops to below zero bar and the resulting pressure differential operates the blowoff valve's piston. The excess pressure from the turbocharger is then vented into the atmosphere or recirculated into the intake upstream of the compressor inlet.