Cheers Nassa.
Well it has been positively beneficial on my red car. When I got it with ~193K km it drank about 1 L/1000 km, now after the mod and at ~250k km it drinks about 0.4 L/1000 km.
Moreover, the car revs happier and pulls harder
(crankcase vacuum also improves ring sealing), and the oil remains cleaner.
In fact I'm now doing the same mod on my silver car, even though at only 55K km it barely drinks any oil at all (
oil control rings not yet stuck).
Unfortunately the L61/Z22SE cam cover is not easily serviceable, for the baffling is riveted and we risk destroying it if taken apart. Another engineering feat.
IMHO having to pull apart the whole intake manifold and associated items just to service a frigging hole is a plainly ridiculous proposition. Better to add an external and easily serviceable additional post-throttle PCV line.
I happen to disagree. An extra or "by-pass" post-throttle PCV line lowers oil consumption empirically. What I believe really happens is that what is in essence a larger metered orifice increases flow volume (good for crankcase evacuation, specially on high mileage engines),
while decreasing flow velocity (good for reducing oil consumption, as you've explained).
^ That's a nice gadget, displays very interesting info. Is it some kind of OBD2 scanner, Nassa?