Originally Posted by TechniqueTuning
A blowoff valve is completely different than a wastegate.
A wastegate is used on the exhaust side and regulates the speed of the turbo by bypassing exhaust gasses.
A blowoff valve is used on the intake side and releases excessive boost pressure when the throttle plate is suddenly closed.
so a wastegate is like a boost controller? then do all turboed cars have blow off valves except some are louder than others?