Re: K24 and boost - more on WGFV

[Orin Eman <orin@wolfenet.com>]

> read into your post.  A WGFV, in fact, all FV used by audis, have a feed, a 
> measured output and a vent output.  Translated, that's 1 input 2 outputs.  
> Reading your post, one sees 2 inputs, 1 output, technically not correct, 
> since the off position (vacuum) of the valve doesn't do anything in terms of 
> WG activity (my original post regarding WGFV operation).  Just trying to 
> clarify any misunderstandings.  

We have a bit of a semantic game here.  The WGFV is only a vacuum
switch.  You can label it's ports however you please...

I could say you have two pressure inputs (manifold and pre-turbo)
and one pressure output (wastegate)... the wastegate gets to
see something between the two depending on the duty cycle.

With your labels, the port to the wastegate is both an input and an output...
an output when switched to the intake manifold and an input when
switched pre-turbo.

If this were an electrical system, the line to the wastegate would
definitely be an output and the other two inputs.  The fact that
one is usually negative relative to the other doesn't change it.

Orin.