I can't remember the exact posts, and don't feel like looking for it since I'm sick, and maybe I'm just crazy and this doesn't apply to RWD SR20DETs, but check out these threads:
http://www.sr20-forum.com/general-sr20/9334-finding-way-get-rid-oily-blow-gases.html
http://www.sr20-forum.com/turbo/9914-confused-oil-separator-system.html
http://www.sr20-forum.com/general-maintenance/9611-how-reroute-oily-blow-gases-clean-up-intake-manifold.html
Hope that helps. I'm running blowthrough on my FWD SR20DET and have problems with a little blowby.