[Shotimes] RE: PCV extractor and vacuum in crankcase

[Bruce Malachuk]

I have a Mr. Gasket crank case vacuum kit sorto of installed into one side
of my y-pipe on my opal frost. This is then connected up to the oil
seperator line that useed to be attached to the TB. The valve cover is
capped, as are the ports on the TB and the intake itself for providing air
or vacuum. The Mr. Gasket like alot of other CCV kits has a metal one way
valve that screws on to the connector at the y-pipe, only drawback is that
it makes an annoying clicking noise that can be heard from the car.
 
I know it makes a good vacuum, when running anything over 2500 cause the
valve stops clicking and I know that means that it's got a pull of vacuum on
it constantly. Also my oil loss from my old leaky valve cover gaskets has
stopped since the CCV was re-attached and rerouted to get rid of the burned
holes in the hose that were causing leakage.
 
I was looking at the PCV valve on the gen3 and thinking that there must be a
way for me to incorporate that valve into the system and get rid of the loud
clicking metal valve on my y-pipe. Am I correct in thinking that the PCV
valve on the gen3 or some other car would close when there is no vacuum and
open when there was vac pulling on the outlet part? Like a spring loaded
valve?
 
I have yet to hook a line up to it and measure my crank case vaccum at idle,
cruise, or WOT, but even at idle with +20 cams I hear the clicking of the
valve opening and closing so the exhaust pluses on half the y-pipe must be
enough to cause some vacuum to be created at idle. I am considering tapping
the rear valve cover and assing a vent with a filter in the rear and doing
the same for the front fresh air line. Prolly will t them together and put
them into a small K&N breather filter, was also thinking of putting
something in there to limit the airflow so that it wouldn't negate the
vacuum effects. Something along the line of an alumuinm rod with a hole
drilled thru the middle to allow a little airflow to vent crank case gases
but enouhg to keep it from not pulling a vacuum at say 2000+. 
 
Bruce J Malachuk

*	94 Opal Frost MTX 

*	93 Emerald Green MTX - SOLD 

*	93 Black ATX - New Parts CAR 

*	95 Silver Frost ATX SE - SLO -Buyer waiting 

*	96 TR - Cam Failed parts car :-(

 

  _____  

From: Paul Nimz [mailto:pnimz@v8sho.com] 
Sent: Monday, August 01, 2005 9:39 PM
To: `V6 SHOtimes; `V8 sho@v8sho.com; `TechSho@topica.com
Subject: Re: PCV extractor and vacuum in crankcase


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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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