[s-cars] pressure testing...

[Mike Fitton]

I've been attempting to pressure test my intake and hopefully try to 
track down some leaks.  I capped off the compressor inlet and am using 
the wastegate frequency valve port on the compressor housing.  Have met 
with some success with this setup and seem to be getting some useful 
information.  First thing I notice is that air is coming out of the 
breather port on the front of the valve cover.  During operation, this 
air is routed back to the compressor inlet.  Since it's after the MAF, 
it doesn't constitute unmetered air, but I still wonder if the turbo is 
supposed to be wasting that energy on moving that air around.  The only 
way I can see for this to happen is via the PCV system that starts under 
the throttle body.  So my first question is...is this normal or does it 
indicate a failure of the PCV valve?  I've been testing it at about 20psi.

-Cheers!
Mike

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