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When I had my carbon fiber half shafts and driveshafts installed at Van Steel today - I also had them install a vacuum evacuation system.. This system replaces the PCV system. Instead of sucking hot and oily air into the engine through the PCV system - that air gets sucked into the exhaust... That system also creates a vacuum in the crankcase which helps piston ring sealing and adds compression that way...
I'm already noticing one consequence of that system.. The smoke that I had at idle is around 70% less because the oily air is not getting sucked into the engine where it was burned (which causes smoke)...