bigBADbenny wrote:It's the same thing more or less, are you on a stock inlet?
The rearmost return hose on the stock inlet pipe get capped and that hose is joined with a y coupler to the other return hose just in front of the bov return pipe, via the AOS on the oil filler on the other side of the engine
Let's say it might be a good opportunity to install a silicone inlet, most of which deleted the rearmost return anyway.
Yes, I have a similar layout for pipes in my head - stock inlet on the Gen V is nothing like the Gen IV though the inlet manifold CC and head breather set-up appears quite similar.
But the low-mount turbo means the inlet pipe runs from the bottom of the air-box, straight to the front right lower corner of the engine. The Turbo-IC pipe is about 1m long and comes up the front, then the top RHS of the engine to the IC. Both the CC "clean air" pipes (from inlet to heads/CC) run down alongside the inlet pipe as steel pipes, connecting near the turbo inlet behind/below the radiator, and switch to rubber at the top of the engine.
The head breather crossover in hard plastic sits on the backside of the inlet manifold. The CC breather T's just above the crankcase with the PCV valve going into a short pipe into the back of the inlet manifold plenum (provides vacuum source). The other side of that T goes down to the inlet pipe pre-turbo.
Silicone inlet for Gen V is approx $300 I think - and a prick to replace by the looks -maybe easier from underneath though?
So I plan to grab the pipe from the head crossover breather, tee the CC breather into it under the manifold somewhere, then send that to the "dirty" side of the AOS.
The "clean" side pipe of the AOS then returns to connect to the pipes that run down to the pre-turbo inlet. One of those I can block off under the manifold.
So my airflow scheme is this:
Under Vacuum airflow: inlet>breather pipe>AOS clean>AOS dirty>head breather crossover/CC. (The PCV valve will suck fumes out of CC and draw fresh air in via heads to replace it as the factory system is meant to)
Under Boost airflow: CCV/heads fumes>head crossover/CC pipe>AOS dirty>AOS clean>breather pipe>inlet. (so blowby is cleaned before fumes push out into the inlet).