Is it possible to do a PCV valve delete with proper filtration or am I stuck using catch cans
If you delete the the hoses coming from the engine and put breathers on there you have to block off the connections where they connect to the intake tube and the turbo housing. If you block off both connection points NO unmetered air will enter the engine. Well, enter the intake or cylinders. So if you do this properly there will be no tuning issues. If you just put a filter on the front of the valve cover and leave the rear tube connected to the turbo housing then you will have unmetered air entering the intake and will cause tuning issues. So remove and plug both connection points or it's useless.I'll stick to my original statement that venting to atmosphere allows unmetered air into the engine which is not a good thing. Unless someone with more knowledge provides technical evidence regarding the MAF and ECM with regard to unmetered air.