is the pcv valve not strong in these motor i mean how much boost can they hold before they start to let boost into the crank case?? from what i've read people are putting them infront of the turbo via a catch can first. i guess this would cause an actual crank case vacuum under boost from the turbo sucking. right? wich my act as a small vacuum pump like they used in hot rod mag said they got like 10 freed up hp i think it was. what about the other vent just filter it off or run it with the pcv??