My catch can routing ok?
i would run one line out of one valve cover to the catch can dirty, can add second inlet if you want for other v/c but not required.
also dumb question, what state wont let you run a filter on a catch can but you dont have to run a filter at all on the entire engine?
I was planning on joining together the two rocker cover vents, also the valley cover vent and taking them into the catch can. Then take the CC to the end of the manifold block which i have taken each induction runner too. It also supplies vacuum to the brake booster. At this stage I am running no air box. Will this work, and do I have to run a non return valve in the line?

https://ls1tech.com/forums/generatio...cv-system.html
https://ls1tech.com/forums/generatio...32-ok-pcv.html
https://ls1tech.com/forums/generatio...lve-cover.html
https://ls1tech.com/forums/generatio...ls2-427-a.html
https://ls1tech.com/forums/generatio...-question.html
I have tons of diagrams not posted here. Post or PM if you want help.
i would run one line out of one valve cover to the catch can dirty, can add second inlet if you want for other v/c but not required.
also dumb question, what state wont let you run a filter on a catch can but you dont have to run a filter at all on the entire engine?
stock like pcv operation + boost compatibility + catch can + instant crank pressure relief as needed.
The Best V8 Stories One Small Block at Time
BUT for higher hp, the valley cover is not best option to go to can because of its restriction.
I was checking for a vacuum leak, for high idle problem with my carb, noticed oil leaking off the bottom of the rubber hose that houses my pcv valve,<br/>Time for a catch can!<br/>Any suggestions on a good catch can? <br/>Engine is a iron block LS1 stock fbody internals LS2 valley cover.
here is an oil fill adapter i run on my car.
i think valley cover or opposite valve cover is best option to get as much 'wind' through as much of the engine is possible. that valve cover port was chosen i guess due to the lack of a better idea (at the time) from gm
I am running a pre-'04 ls6 valley cover (no orifice) on my (more or less) max effort ls1 that will see road racing / auto x / some strip. Based on what I had read about the valley covers being too restrictive and people blowing out crank seals, etc, I had planned on also venting the driver's side valve cover to the dirty side for extra flow capacity for when it is needed. I assume this was in reference to the later valley covers that didn't flow as good.
Given that my valley doesn't have that orifice, is it necessary to have the secondary vent through the valve cover? Or is it still a good idea? Also, will I need to add a restrictor orifice in the line for the valley cover? I'm looking to run a closed system - I don't want oil misting all over my engine bay so for that reason was not considering a breather vent.
FYI, MIGHTYMOUSE does have CC's with one way valves on the breathers, I believe RX Performance also has a breather with a one way valve that fits in place of the oil fill cap.
Well, I just went through both of your build threads and have come to the conclusion that you might also want to consider building you own CC.
Last edited by 99Bluz28; Oct 12, 2014 at 06:55 PM.
FYI, MIGHTYMOUSE does have CC's with one way valves on the breathers, I believe RX Performance also has a breather with a one way valve that fits in place of the oil fill cap.
Well, I just went through both of your build threads and have come to the conclusion that you might also want to consider building you own CC.
I'd be lying if I said that I hadn't thought about making my own but I don't need any additional projects at the moment. Probably going to end up with an MM pcv can as it seems to address everything i'm hoping to accomplish with this system. might add a second can down the road if the need arises
BTW, if you can mount the CC to one far front corners of the engine bay(away from engine heat) to maximize it's ability to condense the oil vapors and trap them in the CC.. This also helps keep the engine from looking to cluttered.
Keep use posted on what you finally end up going with an where you mounted it.









