lower_the_dynamite

iTrader: (22)

I have the Mike Norris catch can and after a few pulls, I've had some seepage on my oil pan gasket. I have a feeling that the routing of the catch can needs to be changed and wanted to get some opinions. Please let me know what you would suggest changing.

Thank you.

6.0 with 88/83 turbo
Stock ls1 Valley cover
2-38mm wastegates
1-50mm BOV

jrpimp00

iTrader: (17)

You need a one way check valve in line to keep from boosting the crankcase. Check out this thread

https://ls1tech.com/forums/generatio...ing-ok-15.html

And where is your fresh air source?

lower_the_dynamite

iTrader: (22)

I do not have a fresh air source in this routing.

I assume I need to do this.

http://www.andersonperformance.net/p...1extfiflow.jpg

jrpimp00

iTrader: (17)

Fresh air source will help with getting clean air in but wont help with your pressurization problem. You need that check valve if your going to run a stock pcv configuration

lmt0705

iTrader: (7)

im venting valve covers direct to a catch can, no issues for 2 seasons with 22 psi

coltboostin

Its not optional, its mandatory!


This is worst case scenario incorrect for an FI set up. Think logically about it-when you are in boost, where can the air go? If thats a sealed can you are literally just presurizing the motor! I just bought a turbo car that had a "bad motor or turbo" for pennies on the dollar. Car smoked like a fog machine in boost. When I got it home realized he had the sealed catch can hooked up wrong (routed like yours). I added a vaccume source to the turbo and re routed the PCV. With NO other changes, I have driven the car over a month with ZERO smoke or oil leakege.

Gotit4cheap16

iTrader: (3)

I need help with my routing as well. How would I route a turbo setup with an ls6 Valley cover on a 2004 5.3 block?

gtfoxy

Can you elaborate on the part in bold? You ran a manifold vacuum line to the turbo or you ran a line from the inlet of the turbo to the top of the catch can?

coltboostin

i guess I should specify- Vacuum source to the INTAKE of the turbo. You always want something pulling pressure OUT of the motor-under low load, the vacuum in the intake will do this via the PCV. When in boost, the vacuum created in the intake track (or exhaust of you go that route) will pick up the slack. In a perfect world you always want at worst ambient pressure in your catch can, at best a vacuum environment of the positive crankcase pressure always has somewhere to go, and does not have to find a place (like a seal) to exit!


You dont need 2 catch cans, but here is an example of what I am saying.


If you dont have an intake to your turbo-you can shoehorn a barb onto your air filter- or use this in the exhaust

gtfoxy

I got what you were saying but it was a little obscure for those that haven't done it.

Good explanation & diagram, though.

coltboostin

I agree. Hope this helps!

Gotit4cheap16

iTrader: (3)

can someone post a routing with an ls6 valley cover...on3 78mm turbo, and a breather catch can??