[Shotimes] Re: PCV extractor and vacuum in crankcase

[Ian Fisher]

Jason Zuress and Bruce Malachuk have had a crankcase
evac. system on their V6's for awhile now. I purchased
a setup that I am planning on installing when my 3.2
goes in. After talking to Leigh Smith about this last
year, I was considering trying to figure out how to
rig a system that used the PCV system at idle (with a
catch can) and switched over to the evac when enough
vacuum was achieved. (2000 rpm or so). I may just
install it straight up and forget about it too.

Ian
--- Paul Nimz <pnimz@v8sho.com> wrote:

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> I had a PCV valve on my V6 for a test.  Connected it
> to the oil separator and then tee into the vacuum
> port on the back of the rear surge tank.  With the
> front cam cover sealed and pulling about 12" of
> vacuum while at part throttle here was a noticeable
> whistle from the TB.  Too much for me.  Perhaps this
> system that will produce the highest vacuum levels
> when at WOT and little to none at normal cruising
> will be different.  You are the pioneer Joe.
> 
> 
> Paul
> 
> 
> > 
> > 
> > ----- Original Message -----
> > From: Paul Nimz [link: mailto:pnimz@v8sho.com]
> > To: `TechSho@topica.com ; `V8 sho@v8sho.com [link:
> mailto:sho@v8sho.com] ;
> > `V6 SHOtimes [link:
> mailto:SHOtimes@autox.team.net]
> > Sent: Monday, August 01, 2005 8:23 PM
> > Subject: Re: PCV extractor and vacuum in crankcase
> > 
> > 
> > You know they make Vacuum regulators for cheap.
> They are called PCV valves.
> > 
> > 
> > What I would do if I was in fear is put a 4
> cylinder PCV valve on the
> > front cam cover connected backwards so fresh air
> is being drawn into the
> > cam cover. Attach to this the ricers small air
> filter of choice. Then
> > install a tee in the line going from the oil
> separator to the exhaust
> > piece. Attach a vacuum gauge to this and go hot
> rodding.
> > 
> > Only then can you tell if you have too much
> vacuum. I consistently run 8-
> > 12 " Hg of crankcase vacuum but under light load
> conditions and at WOT 0"
> > Hg. This mod that you are doing will do the
> opposite. It will create the
> > highest vacuum with the increased exhaust flow. I
> would look for
> > 15" Hg at peak for a goal. The higher, the better
> and you should see a very reduced reading most of
> 
> 
>
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