To PCV or not to PCV

[Gaz64]

For a street registered car that spends 90% of it's time at part throttle, you will get more benefit out of having a well designed system like I quoted above, versus a non-positive crankcase system, which simply allows blowby to vent to atmosphere.
A non PCV system with 2 vented filters at part throttle, instead of consuming the blowby gas, is just topping up your oil with blowby acid.

A car meant for off street racing is a completely different ballgame.