It's a shame about his posts being gone. I started working on my NRG oil catch can before I read this post.

I'd like to get hold of a vacuum gauge and take 5 tests of the intake manifold suction pressure with just the black stock oil separator, without the stock oil separator, with just the Best4x4 Fram PCV mod, with just the oil catch can, and with the PCV Fram mod & the oil catch can. Just to see how much air restriction is or isn't there to the intake manifold.