<P> 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 below atmospheric pressure 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 . </P>
<P> 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 below atmospheric pressure 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 . </P>
where does the blow off valve connected to
where does the blow off valve connected to
intake manifold after the throttle plate
intake manifold after the throttle plate