Because when you get up into Race Car status, its pointless to even mess with. Just vent the crankcase to a properly sized breather, and change the oil on time.Why do you want to delete the PCV system??:frown2:
It performs very useful functions if you want your engine and oil to last longer!!:wink2:
The stock is set up for the pcv, with no vacuum in intake you have no unmetered air causing lean condition. You should worry about pressure in crankcase, it will leak oil under boost. Blowby and boost will make one leak that normally doesn't.Im not worried about air into the crankcase, im worried about it sucking unmetered air from the crankcase being overpressurized and going into intake downstrwam from the mass air meter causing a slight lean condition.
Going this route, you have a vacuum leak of unmetered air entering the intake through that clamp on filter.A check valve inline will stop the pcv from letting pressure into the crankcase under boost. Some pcv's hold and some don't. The tube that runs from the TB to the oil fill tube will do it also. On my friends 91 we made a check valve and put inline with pcv and removed the line from TB to fill tube, capped it at TB and used a clamp on filter at fill tube. This stopped his issues.