How does a boost controller work ?
There are 2 main components of a boost control system on a turbocharged engine: the wastegate with actuator and the boost controller. Note that some turbo cars do not use a boost controller as such, instead they rely on the spring rate in the wastegate actuator to achieve the desired boost level.
There are two types of wastegates; internal and external. Internal wastegates are found on the vast majority of turbo cars, where a flap-type valve is ...
How does a dump valve work ?
A blow-off valve is an air pressure bypass valve that is placed between the turbo compressor and the throttle.
When your turbocharged car is on boost, the entire intake system is filled with pressurised air; from the turbo compressor, through the throttle body and inlet manifold and into the combustion chambers. When the throttle is closed, this pressured air can no longer enter the engine. The only path available for the air is to try to flow back the way it c...
