https://ls1tech.com/forums/generation-iii-internal-engine/237493-excessive-crankcase-pressure-help.html

I'm real confused as to whether this is the system many here are running or something else. I have a catch can and am concerned about damage unless I can be set straight. Please straighten me out. Thanks.

 

I think the person was confused a bit...

I've never ever heard of anything wrong with a catch-can setup installed inline with a (manifold) 'vacuum assisted' PCV system...

I think that person was calling the fuel fitlers or whichever, catch-cans... To me that, was simply venting to the atmosphere.

 

I find the problem in deleteing the pcv... the catch can and breather in conjunction with it is good.

I run an inline air oil separator in my pcv line to pull out some of the oil to prevent from blwoing it in the intake. I dont have blowbye as it is a fresh block, it just does that

 

I guess my question is; with an in-line catch can installed is there still a vacuum being pulled by the intake and all that is really going on is just extra filtration? IE-the pressure is still being relieved with a catch can as long as it is connected to intake [Y/N].

 

yes
.
.

 

I went one farther and installed an LS6 valley cover and vent to an AMW catch can from that. Seems to work well and I havn't seen any issues regarding it. It jas caught some oil since, so that is encouraging. I guess that means it's working.

 

I wanna try an LS6 and Ls1 PCV system together in to a Catch can, My thinking is that possibly I can slow down the incoming crankcase gasses by using multible sources so that possibly the PCV will suck less oil.

 

"I wanna try an LS6 and Ls1 PCV system together"

How?