[blueroadster]

Originally Posted by Mr Bigs

Here is a nice one I came across Perrin Performance - Oil Catch Can/Overflow Tank

That would work as well, but I would like to keep the PCV catch can within a confined space. I did read the link that you provided and that adds more food for thought.

Specifically, the oil catch can plan described this far would be fully functional and would work in an N/A application. In a boosted application, it would also work somewhat in that the check valve would close thereby preventing boost pressure from entering the crankcase. The issue with this however would be that when the engine is under boost, the normal PCV exit for the crankcase ventilation system would be closed (not a good thing). So we would also need a solution to cover boost conditions to allow for the crankcase to continue to be ventilated. A simple solution would to plumb into the exhaust, but the issue with that is that the stock crankcase ventilation system receives metered air that is expected to go through the PCV. If that metered air was constantly sent to the exhaust, then that would confuse the stock ECM.

Maybe a potential solution in a boosted form is to have the PCV connection function as normal (with the catch can) and then integrate a valve that would open only under boost conditions to allow for the exhaust to then serve as a vacuum for the crankcase. These are just some thoughts running through my head at this time and I'd have to say that if we did not have a MAF, then we would probably not have to devise some way of making a system that is simple but yet still works.