Explaining external and internal wastegates
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Explaining external and internal wastegates
Here is some info that can help most of you as to knowing what differences are between an Internal or an External wastegate. An internal wastegate is built in as part of the turbocharger's turbine housing. It consists of an flapper door that allows exhaust gas to bypass the the turbine blade, thus regulating the amount of boost created. An external wastegate is a separate unit from the turbocharger, located on the exhaust header/manifold between the engine and the turbo. Regulating boost is done in a similar bypassing method, but is done before the exhaust gas reaches the turbochargers turbine housing. The size of an internal wastegate is proportionate to the size of the turbo, where as an external wastegate, because it's located outside of the turbo, can be made much larger. An internal wastegate becomes too small when the volume of exhaust gasses coming from the motor exceeds the efficiency of that size wastegate. That's when an external wastegate can be utilized, to vent the extra exhaust gasses to stabilize boost pressure.
Just thought it would make a nice addition to those that like to know more in depth about turbo systems.
Just thought it would make a nice addition to those that like to know more in depth about turbo systems.
rice sleeper
Joined: Mar 2001
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Old School "Turbo" dude
Joined: Feb 2002
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Originally posted by Taylor Durden
alot of guys will take internal wastegated trubos and weld the wastegate shut then modify the exhaust manifold to accept an external gate.
alot of guys will take internal wastegated trubos and weld the wastegate shut then modify the exhaust manifold to accept an external gate.
Nissan T28 BB, Tial Gate, and tubular manifold 
