924Board.org

[sparky001]

Hi all,
Not a mechanic, just a prospective engineer. Been researching about this and possible solutions/upgrades. 1979 924 turbo UK exported to NZ, so noticed the oil coming out of intake to find the Air Oil Separator (AOS), to be basically filled and was most likely caused by the aftermarket hydraulic line with a size reduction near the AOS return that probably allowed stuff to build up?

From a forum post there doesn't seem to be a direct upgrade due to the engine producing too much oil vapor? Hence the abnormally large vent hose (top right, #35 in diagram)
https://www.autoatlanta.com/porsche-parts/hardparts.php?dir=924-80-85&section=106-05
https://www.924board.org/viewtopic.php?t=43986&postdays=0&postorder=asc&start=45

Mentions Mann+Hammel Provent 200 but 150 is better? 100 vs 200L/min of blowby. Which seems a good option, unsure where to acquire one and they seem to cost quite a bit... Just uni budget things. Did find an AliExpress fake? But seems I can put genuine filter in it.
The other good one is the IAG one, its has amazing baffles and filter, but the big feature of allowing coolant to pass through a block attached to it. Basically stops water condensation in the can, although it already lives right next to the coolant expansion container which would warm it up enought to stop condensation already? Unsure....

If anyone knows about the 'average' production of blowbly (L/min) and if reducing the pipe to a smaller diameter to enter the seperator will be more harmful than beneficial, would be appreciated.
Don't really want to switch to a catch can due to the amount of oil vapor, unsure if that was from long term or short. Rather not let the engine starve of oil...