Dawes Device

[Peter de Vries]

>The downside is that the FDMBC is also a one way valve, so that any pressure
>built up at the wastegate actuator will not immediately go away except
>through leakage around the FDMBC ball.  So you could run into a problem
>where the boost quickly decreases and only slowly comes back.

What you then do is install across it a one way valve which will vent the
pressure built up in the WG back into the manifold again.

Pete