[s-cars] pressure testing...

[Tom Green]

>
Normal, Mike.
You may want to plug it to better hold pressure and reduce the
noise while looking for leaks in the intake tract.

Tom




> -----Original Message-----
> Date: Sun, 23 Nov 2008 22:28:44 -0500
> From: Mike Fitton <rfitton at vt.edu>
> Subject: [s-cars] pressure testing...
> To: "'s-car-list'" <s-car-list at audifans.com>
> Message-ID: <492A1F6C.4020008 at vt.edu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> 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