Originally Posted by poly_poly-man
^^ this is the post I'm looking for, I believe.
However, I can't help but notice that this requires deleting the PCV - I'm having trouble finding information about this (but the general gist of the internet on this seems fairly negative) - any chance you could link me to some information on doing a PCV delete on a turbo subaru?
Thanks very much for the input!
The choice is up to you on the PCV, I tie the heads into the crank breather and send it into the turbo inlet. Eventually I want to put a catch can in to catch any oil vapor but I think of my FMIC as a huge catch can anyway. My goal is to pull a high vacuum on the breathers at high boost just like the engineers at subaru did from the turbo inlet. Under high manifold vacuum when the PCV valve would be open it allows the oil vapors to be burned more effectively rather than condensing in the intercooler and dripping down reducing the engines HC cruising emissions since that is the only time it would ever be open. THink about it, the valve would only be open when there is a negative pressure differential between manifold vacuum and the intake pre turbo, IE idle vacuum (3-5psi absolute) to ~10-12 psi absolute exactly where the car would be cruising.