Is the pressure merely the restriction from the holes that the oil comes out of for the lifters and to oil the cam?
yes although you wouldn't want to run an engine for long without the VC... and 1x with libbybapa.
my 1.6TD had the problem of the dipstick shooting out if i drove the car hard... the sump vent to intake would virtually eliminate that (common) problem.
Is the dipstick firing out due to blow-by?
Edit: and im trying to AVOID blow-by entering the intake... i don't want ANY oil going past the valves. It really gums everything up :S
yep dipstick firing out due to blow by at high rpm/boost. but now i have my mTDI that i haven't really pushed due to slipping clutch
at least on your engine you don't need to worry about the EGR gunk
but yea reducing blow-by is really good idea if theres a lot. it would be cool if there was a way to use the force of the incoming air to create a centrifuge to sling the oil out... but a much less complicated setup would be to either add a filter to the intake and a pipe running to the sump, or just running the simple catch can.