Here is the problem I see. Normally you suck the crankcase from drivers side using manifold vacuum. This si why on a normal set up you put the catch can on the driver's side. And then normally it draws the clean air into the crankcase from the passenger side from the intake after the MAF. This is a normal system where there is vacuum present. Now, while your car is at idle or light throttle it will continue to work the same. When you go into boost is where you are going to encounter issues. If you have the passenger intake side drawing air from the intake after the MAF and before the SC your system will work as normal and reverse itself while under boost. This is where you are going to need a catch can on the passenger side also. Without any vacuum the pcv valve will not open and it will not flow as normal. In your situation, under boost, you will have pressure at both ends of the system and no escape for crank case gases to go unless the internal pressure of the motor exceeds the amount of boost you are making. Either way you won't catch any oil on the passenger side with the PVC system fully intact. Maybe a little bit under boost. Either way you need to be able to vent the crankcase under boost or you're going to start blowing out seals and stuff. My suggestion, remove the PCV valve from inside the drivers side valve cover. Put a breather on each side and buy an oil cap breather from CFM. This will give you three points of exit for any positive crank case pressure. You wont need catch cans and you will never get any oil into your SC or intake. Option 2: You can just move the passenger side intake connection to a point before the the SC and after the MAF, keeping the passenger side can and adding a drivers side can. This will work and the system will flow in both directions depending on manifold pressure or vacuum. This still may introduce oil into the SC or intake tract if any gets by the catch cans. Option 3: You can leave the system the way it is and add a CFM oil cap breather with check valve and a catch can to the drivers side. This way, while under boost, any crank case pressure can be relieved through the breather cap. This is probably the least desirible IMO. Personally I would go with my first suggestion.