Subd

But if you do that then lines 6 and 14 (and the filters on them) are going to be exhausting much more than they already are, which could cause oil vapour to start making a mess of the engine.

Yea I just haven't seen that over a period of a year in track environment with my car. And the front two are freely open.

:iagree: yeah, why would you do that?

Same here. minus the crazy track time.

venting the PCV valve will not harm the motor, only reason why its recirc into the intake is for emissions purposes

just whatever you do dont close the PCV, either have it recirc or vta, if you close it off entirely, you will harm the motor

I always run PCV systems as they come from the factory, no harm done. When I turbo the car, I just relocate the fresh air vents to pre-turbo how they come on factory turbo cars.

The oil going through the intake is extremely minimal. It builds up a thin residue inside the piping, but its never slowed my car down or caused a failure. I never really understood all the stress over catching it in a can and all the hoses all over the place. But I wouldn't eliminate the setup either.

The way the BP turbo kit has you do it makes plenty of sense since the turbo inlet is rather far away from that point.

Sorry, you're wrong. I've had breather filters on my valve covers for over four years w/thousands of miles. No idle issues and no "oil residue" in my engine bay. I don't want oil residue in my intake pipes and oil/dirt/gunk making my throttle bodies stick.

I know I’m reviving a decade old thread, so no one may even have this info anymore. Can I check Spohn, if I run vents on the rear ports (that usually connect to the intake tubes), and leave the front PCV hoses (with the check valves, that connect to the front of the manifold) connected like OEM, will that work fine?

I’m seeing so much conflicting info on the PCV and CCV system for these motors, hard to make heads or tails of it.

Yes, running rear ports vented to atmosphere with front PCV valve is fine. The rears allow venting when the PCV valve closes.

I speak from experience, if you block the rears with the PCV valves up front, you will create a too much vacuum that it will pull oil up enough to cause the low oil light to come on.

ideally, if you want to keep the PCV valve, utilize a closed system with the rears plumbed to the intakes to assist in bring fresh air or help suck the vented pressure when the PCV valve closes.

otherwise, vent everything to atmosphere, front and rear.

I am speaking with regards to a NA setup.

I know for the SR20 engines, its seen to be most benefited to run it how Phunk mentioned so it seems it applies to boosted VQ also.

I ran the EPS PVC delete kit which blocks the rears and puts breather filters on the front for over 5 years and didn't run into any issues with oil consumption; I can't say for the opposite (fronts open, rear blocked) as I don't have any experience doing so.

I'm currently installing my turbo kit (BP) and my tuner recommended venting both front and rear ports.

I removed my PCV valves, and I run both ports (PCV and Valve cover vent) with 10an lines to a catch can. I have two catch cans. One for each bank. Mine vent to atmosphere.

https://www.realstreetperformance.co...er-filter.html

Spooler, where do you have your cans mounted? I'm trying to find a good location to mount some catch cans but space is limited, as I'm sure you know.

I have two. You can see them in this video. I have extra room because my intake pipe comes over the radiator support.

...don't think the video posted :icon17: