Don't know what kind of PCV systems you guys have but mine works like this.
The PCV valve is connected to the intake. The PCV valve acts as a regulator only allowing so much flow into the intake and in case of a backfire a check valve to keep the backfire from entering the crankcase. Air is drawn in through the valve covers which is connected to the pre-TB intake and after the MAF. This way the extra air is measured by the MAF and does not act like a vacuum leak. The PCV valve is open and regulating anytime there is intake vacuum. At WOT when there is no vacuum the valve closes due to gravity but does not completely seal shut. If there is crankcase pressure due to blow-by it will be pushed past the partially closed PCV valve and into the intake or will also be drawn in to the TB due to the pressure difference between the pre-TB intake track and the crankcase.
In my experiments the filter will not stop anything due to the fact you are filtering a gas. Any liquid being sucked up will be stopped but this is a failure of the oil separator or it is overcome due to too much flow or too much blow-by.
I use a flow through can which condenses the gas and then drains after the car is shut off. This is a 3" x 9" aluminum tube. The small fuel filters get hot and don't condense anything. You will of course find something in them but not near what is really flowing through them. My condensation can will collect 100 ml in 200 miles. BUT this is with the PCV intake at the valve covers plugged. With the PCV intake connected normally the amount condensed is double that.
[ December 25, 2003, 05:33 PM: Message edited by: SHOZ ]
The PCV valve is connected to the intake. The PCV valve acts as a regulator only allowing so much flow into the intake and in case of a backfire a check valve to keep the backfire from entering the crankcase. Air is drawn in through the valve covers which is connected to the pre-TB intake and after the MAF. This way the extra air is measured by the MAF and does not act like a vacuum leak. The PCV valve is open and regulating anytime there is intake vacuum. At WOT when there is no vacuum the valve closes due to gravity but does not completely seal shut. If there is crankcase pressure due to blow-by it will be pushed past the partially closed PCV valve and into the intake or will also be drawn in to the TB due to the pressure difference between the pre-TB intake track and the crankcase.
In my experiments the filter will not stop anything due to the fact you are filtering a gas. Any liquid being sucked up will be stopped but this is a failure of the oil separator or it is overcome due to too much flow or too much blow-by.
I use a flow through can which condenses the gas and then drains after the car is shut off. This is a 3" x 9" aluminum tube. The small fuel filters get hot and don't condense anything. You will of course find something in them but not near what is really flowing through them. My condensation can will collect 100 ml in 200 miles. BUT this is with the PCV intake at the valve covers plugged. With the PCV intake connected normally the amount condensed is double that.
[ December 25, 2003, 05:33 PM: Message edited by: SHOZ ]