Keep us posted! Nice job so far!

 

Did you remember the check valve, so the manifold pulls dirty air only, and not air from the turbo?

 

The way it's setup now I have the tap from the manifold to the PCV external housing, then to the tee with the valve cover dirty. The bottom of that T will go to the dirty input of the catch can. I'll then take a clean line from the catch can and run to a separate tap on the manifold.

The guys at RX said I only needed to put the check valves that were provided on the 2 cleans from the catch can. Shouldn't that cover it since the PCV is between the T and the manifold and would prevent pulling air from the turbo?

 

I think we need to see a sketch of your whole catch can system to be sure. If you are using two PVC/check valves then you are on the right track. RJ shows a similar one can system on a sketch here, page 22

https://www.chevyhhr.net/forums/2-0l...-54350/page22/

He doesn't use "port 2" since not much dirty crankcase vapor comes out of it, most all of the crankcase vapor comes from the manifold tap.

His testing shows about 19 " hg of manifold vacuum at idle... and when spooling the turbo the connection for the clean side of the turbo sees about 4" hg. Therefore, there is a need for two PVC/Check valves in the system so that when the intake manifold pressurizes, the catch can isn't pressurized and we still get about 4" hg vacuum moving the dirty crankcase vapor through the catch can to provide clean vapor to the turbo connection. The second PCV/check valve is put in the clean line to the turbo so the intake manifold doesn't see the line as a small open hole, reducing the intake manifold vacuum at idle.

This is how i see it anyway. RJ has done an awesome job of testing the system(s) he has put on his SS.

Randy D.

 

For the record, my artistic abilities are with the drums, not art.

But this is what is going on with the setup

 

Hey, that is a great sketch...

This should work fine... however I'm not up to speed on why you have the PVC valve in 1/2 of the dirty line. Seems that the two other check valves serve that purpose. You should never get reverse flow from the catch can unless one of the other check valves fail... then the flow would be directed over to the other dirty port on the valve cover (through your tee).

Just my thoughts... Randy D.

 

Interesting. I was under the impression in order to keep the PCV functionality I needed to do the external PCV. When I was talking to Tom at RX he mentioned dirty out from manifold to PCV into the dirty in of the can, then clean out to check valve before back into the manifold. He said the check valves on the clean keep the system in check to make sure the entire system is pulling clean from either the valve cover or the manifold.

 

To me it seems like you have defeated the PCV purpose by installing the tee and tying in the valve cover port (Port 2 in other threads). Did Tom at RX know you were adding this tee in the line from the intake manifold (crankcase vapor) to the dirty side of the catch can?

I know RJ is working a bunch of OT right now but when he comes back on-line he will probably have some good insight.

 

The reason why they're tied together is because I need to clean those 2 feeds - the one that goes from the valve cover port to the turbo inlet, and the intake manifold. I didn't want to run 2 seperate catch can setups, which is why they're teed together. If it was a 2 can setup, I would still run the PCV for the manifold side since I still want PCV functionality. The line from the vale cover port shouldn't continue to travel through the T to the PCV and into the intake manifold, since the flow of the PCV is in the direction towards the T - it won't allow it to do so...or at least that's what I believe. It's all an experiment.

I sent the same sketch to Tom at RX, he said it all looks good!

 

Looks good, drummerboy. I forgot that the check valves were included. The PCV valve may or may not be redundant, but it certainly won't hurt.