Originally Posted by Alps Pacino
the amount of gas you can flow is the main advantage
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so what type of boost does a normal internal wastgate give up at, or is it not that simple say a -31 for eg
not that simple, its not about how much boost, its about how much excess gas you have to get rid of which is a lot to do with the turbo spec and rpm the engine is doing compared to how much boost you want.
on most engines, at full power, there would be little or no gas to flow anyway as the turbo would be barely coping with making the boost anyway.