My understanding is the PCV needs vacuum to open but when your at WOT there isn't much vacuum so you get no ventilation at WOT? When your racing isn't that when you need ventilation the most or oil starts to blow out of bad places (dipstick tube)? If that is correct a PCV valve does nothing to help when racing at WOT or does the Wagner adjustable PCV fix that issue?

I thought about running an EVAC breather to the header collector but these systems say not to run them on a car with mufflers. I'm building street/strip car.