BOV blow off dump valve

ST3V3 TH3 STARLET

Fresh Recruit
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 :)
 

mr2 rev3

Member +
You will need a turbo to fit one buddy.

And read this this should clear things up..

http://en.wikipedia.org/wiki/Blowoff_valve

But to summarise...

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.
 
Last edited:
Top