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The mkiv Supra Owners Club

best bov, and anybody got one for sale?


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so why do people fit external wastegates i have to wonder.

 

You're confusing your technology I'm afraid.

 

An external wastegate, is simply a WG that's NOT part of the turbo.

 

External wastegates control boost pressure by regulating exhaust gas flow into the turbine of the turbo.

 

External wastegates bypass the air to the atmosphere via a short exhaust, known as a screamer pipe, or back into the main exhaust.

 

A BOV releases boost pressure in the intake pipework when the throttle valve is closed. A recirculating BOV redirects the from the post turbo pipework into the pre turbo pipework.

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