Adjustable PCV and oil catch devices?

yellow rose said
I've posted before how I do it.

I run the PCV and pan evacs. At idle I have the PCV pulling crank case vacuum, with a little help from the pan evacs. At cruise both pull. At WOT it's just the pan evacs.

I do not pull in fresh air. It's a sealed system. I could have run a vacuum pump but there is no room for it. And this is actually a much more simple deal.
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Do you mean you don't pull in unfiltered air or do you mean the only thing passing through the PCV is crank case pressure, and there isn't any actual flow through the engine?