yes, but a correctly fitted catch can! I have a link somewhere here in the wasteland.
Chad, heres a pic of an RB25 that represents a decent track setup, open to atmosphere.
so my catch can has two hoses, both connected to each cam cover (replacing the U shaped pipe) so ill be blocking the positive crankcase ventilation valve (so the pcv valve isnt open off boost, sucking air through the catch can) and inlet to turbo from the cam cover.