My mechanic was talking to me today about a Subaru WRX and he tried to tell me that they get decent gas mileage, I know for a fact that they don't. then he jokingly piped up if you keep the Boost at 0. and it got me thinking..

If I can rig up a system in which I can flip a switch and a vaccume solenoid trips the wastegate, in effect turning off the turbo? so if I'm tooling around town, and don't really need any great power or accelleration, I can have it off? is opening the wastegate bad for the wastegate?

or can this be done by tapping into the overboost protection circuit?

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2002 E430 4matic (212,000km)
2002 ML500 'sport'

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