It only affects emissions, not performance. Positive crankcase pressure is vented by the side port on the valve cover, which goes to the intake on a stock car to keep it closed loop, again for emissions. I removed the PCV valve and installed a spare brake booster manifold fitting in its place (a 1/8 BSP to 3/8th hose barb fitting from mcmaster carr would be the same thing) venting the valve cover through 2 3/8th hoses. I still had trouble blowing out dipsticks at over 60 lbs/min airflow on one of my new motors.
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PCV stands for Positive Crankcase Ventilation. NOW tell me, do you think it should be on there? It's there for a reason.
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If I had retained the PCV valve it would have been even worse, since hte PCV closes under boost
So if venting the crankcase is a concern, the PCV is making things worse. NOW tell me if you still think its necessary.
You have to first understand how these systems work and why they are put in place before making decisions or giving advice about them.