Theres no harm in connecting it up imo.. The more breather ports that are used the better..

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I'm a jockey kunts...

^ Have you seen mine? Ross will vouch for my attention to detail.

Brent.

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* [REXPLOIT] - EJ207 2.2L build. Under assembly:
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Just had a better chance to read the info in this thread

The description in your first post Ross makes a bit of sence as to why my catch can fills up so quickly as I'm using the larger head ports to the catch can and blocking off the smaller ones. Everyone I'd spoken to with later model heads has done the same thing, but I realised today that almost none of them are running AVCS and none are running the dual, making my situation unique (hooray).

My motor also came with the plastic manifold which had the PCV built into it which I have replaced with the stock MY03 WRX manifold + PCV. So the car has never ran in my possesion with the stock breathing setup, and the PCV I am using is 8+ years old so I never really had a proper base line to start with.
The diagram at the bottom of your post shows a PCV built into the block.. mine didn't have this as far as I know, the three way plastic dick thing was hollow.

I'll take the time this or next weekend to re-run the hoses (again) and see what happens.



I thought that at first, but its just the way the connectors overlap and the darkness of the photo, its actually tee'd up the same as the mspaint diagram.

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MY93 Impreza GX 1.8L, 0hp, 0nm

So the moral of the story is,

- run your small breathers and pcv to catch can
- connect big breathers and block vent together.

Happy times

+ the crank breather

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MY93 Impreza GX 1.8L, 0hp, 0nm

Block vent, same same.

My block has 2 breathers yo

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MY93 Impreza GX 1.8L, 0hp, 0nm

My understanding is that only the AVCS STI motors have the PCV valve in the traditional place on the inlet manifold & all others had that divorced/ block mounted PCV.

There isn't much in the way of clarification between single/ Dual AVCS breather differences (if there are any).

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[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

One is supposed to be the PCV (drivers side rear), the plastic Legacy manifold has a hollow fitting (not a PCV valve) where the breather feeds back into the inlet manifold (it's just a screwed in Barb fitting).

The other (central) one is for pressure equalization from the rocker covers.

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[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

I always wondered what the larger port outlets were on the heads as mine plumb back into the centre of the block, makes sense now.

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