stang_kllr

iTrader: (6)

Looking for pictures and info on how you guys are running the pcv on your carb setups.

Doug G

I just ran to an air/oil separator from both valve covers.

FLYNAVY30

iTrader: (1)

Ive actually been looking into the exact same problem, and Im leaning towards just venting each valve cover to an oil catch can vented to the atmosphere....open to other suggestions though.

LQ4BU

I am not saying this is the only way, or the best way, but it seems pretty simple and effective. There seems to be many different opinions on which way is right or wrong. But from what I have read IF you are going to do it, you need the LS6 Valley cover with the integrated PCV built in. Supposedly just connecting the vacuum to one of the valve covers (like the old small block chevy) is not effective and doesnt really do anything. Whether thats true or not I dont know.

Diagram pulled from https://ls1tech.com/forums/generatio...32-ok-pcv.html

https://ls1tech.com/forums/generatio...questions.html

Outlaw666

iTrader: (3)

I have mine going to dual catch cans with breathers...I want to add a port at the valley cover also.

LS1-450

iTrader: (33)

PCV mounted in rear driver side valve cover grommet. 90 deg fitting from PCV valve to hose. Hose to catch can. Filtered brake booster one way valve in catch can that allows it to vent under pressure & seal during vacuum. Hose from catch can to vacuum PCV port on intake. Filter/breather in oil cap. Clean air enters passenger side head, travels through crank case & out driver side PCV valve.

FLYNAVY30

iTrader: (1)

so in a basic, un-boosted, daily driver 6.0L, can you get away with just running both valve covers to a catch can that vents to the atmosphere, or do you really need to run the valley cover PCV? I understand the point of the system in an OE application where you can't vent anything to the atmosphere, but is it necessary in a very mild application such as mine?

Thanks for the help!

homemade87

I run the ls6 valley cover and run it to a vacuum behind the carb like in post # 9 . I do not run a catch can . I put a small filter on both valve covers for air intake . I can not see to where I have lost any oil or so small amount I can not detect it . What this does is pull air thru the head on both sides down thru the crank case and up thru the valley area where there is very little oil suspended to pull out . Unlike the valve covers where there is oil flying around everywhere . If you pull vacuum out from valve covers you will loose a lot of oil . My valley cover has the integrated pvc and filter in it so no need add a pcv valve .This also gives a good uniform crankcase ventilation from both sides . I am very happy with this set up . It works well for me .

LQ4BU

I would think ANY vacuum hooked up and drawing gases through the engine is better than none. Everyone has their own setup and ideas. Some setups work better than others, some will siphon more oil than others, but I would think the LS6 valley cover is probably the most effective. Just depends on how far you want to go with it.

Theres also many users that simply put the mini cone shaped air filters on the valve cover tube allowing open air venting with no vacuum, and they've reported no issues with years of use.

FLYNAVY30

iTrader: (1)

Do you have a part number for the cover youre using?

Thanks

TXsilverado

iTrader: (18)

this is how I rolled.

homemade87

The cover I used was a 12577927. It has the internal pcv system . Also has the knock sensor holes . The ls2,3,7 cover is a different part # 12599296 (has no knock sensor holes ) . There is some that came out earlier that has to have an external pcv valve added . Do a google seach on ls6 valley cover , there will be a ton of info to see which one you need .

http://ls1howto.com/index.php?article=18 Here is a how to that may help some of you on the ls1

FLYNAVY30

iTrader: (1)

thanks! in another post, I found that 12577927 is the 2004+ LS6 valley cover with internal PCV....Summit sells it for 100 bucks

Pop N Wood

iTrader: (1)

Mine is like TxSilverado and LQ4BU show in their diagram. Except I am using a 3/8" fuel filter instead of running a hose to the aircleaner.

BUT think I am going to modify mine to delete the extra PCV valve. The LS6 valley cover already has one. I didn't know that at the time I first did it.

onequiklx

Ls6 valley cover with hose to back of carb. Then line from each valve cover to breather tank. Works like a champ

FLYNAVY30

iTrader: (1)

so what did you guys use to block the knock sensor mounting holes in the LS6 valley cover?

TTur1996

This is the one we use. They have three styles, for however you want to hook it up.

homemade87

Flynavy , If you are having to buy one and are not using the center knock get the one that has no holes . It is the ls2 cover , It does the same as Ls6 cover . Ls2 uses the side knock sensers so no need for valey holes . If you already have the ls6 and are not using the center knock and converting to a side knock just clip the wire flush to the oem plug . It is under the FI intake and cant see it . My carb set up I used the ls2 cover with no knock holes .

TTur1996

You can look them up on the Net under Mighty Mouse Solutions.

FLYNAVY30

iTrader: (1)

Hmmmm....well Ive got an LS6 valley cover, with the holes, and an Edelbrock valley cover with no holes or PCV valve. It does have a bung that can be drilled out and a PCV valve added, so I may try to take the PCV assembly off the LS6 valley cover and use it on the Edelbrock cover.....we'll see