PCV Help?

[daredevil95]

You only need one check valve. The PCV line should go from the PCV to catch can to check valve to intake vacuum source. The turbo inlet will not have enough vacuum at low rpm. You can have a line from the valve cover to the turbo inlet similar to the stock set up to help with crank case evacuation under boost. A oil separator could be in that line too. There are many theories on this. On the Corvette Forum, there is a member Kingtal0n that has a many posts on how the PCV system works and what the vacuum a needs are for the PCV and before turbo inlet for engine evac under pressure.
Another theory on oil in the PCV line I've heard is oil from the turbo return line getting on top of the intake bathtub gasket and running to the back of the engine is getting sucked up in the PCV valve. Don't know if that one is possible or not.

Great response, I will run the 1 check valve after catch can. I do have breathers on both valve covers. I hear that should help? I’ll update soon as I’m done today or tomorrow? Thanks, Gene

 

[Pronto]

Vents in the valve covers work fine if they are free flowing. I had got a new set and the rubber flaps were almost closed. It ended up not being enough flow to let the internal pressures out. That ended up pushing the dipstick out. I just cut the flaps out and all was well.

 

[daredevil95]

I’m in the process of making CAI but, I finished the PCV, here’s a few pics, basically working forward…new pcv- rubber hose to inlet of catch can - rubber hose on outlet going to check valve - another rubber line going to intake tube. I didn’t have a 3/8 90 free elbow but I did have a straight hose barb and a old O2 Fowler I welded into tube and straight barb screws into it. Gonna try this setup and see what happens? Idk…forgot to mention, removed charcoal canister? Might relocate it? For now, plugged metal line from vacuum block under TB and put a one way check valve on the vent line. I might put a gas filter in it? From what I read, seems to be the thing to do?

 

[Pronto]

You want to use the 3/8" inlet on top of the throttle body. Put the check valve in the line between the catch can and the vacuum port. The line going to the intake is not needed. If you still want to use it, you'll need a sealed valve cover cap with a 3/8" port in it. Run that without a check valve to the intake port. You can run an open cap on the other passenger side.

 

[0-60n4]

Give me your thoughts on this: factory pcv valve to evil energy catch can non-vented. Then the outlet of the can to a hose with a Tee. From the Tee, one side to a check valve to the distribution block on the throttle body. The other outlet of the Tee to the intake pipe just before the turbo inlet. Could also install a check valve in that line but it shouldn’t be necessary.

My thought is the throttle body will supply vacuum at idle then the intake pipe will supply vacuum at higher rpm and boost pressure.

 

[Chuck Leeper]

Mightymouse Catch Cans

Custom catch cans and complete crankcase ventilation systems for performance, specializing in high power, high flow oil consumption and pressure solutions.

www.mightymousesolutions.com

Take a gander at Dave's site. His stuff works.
He's also got some good test data on various set ups.
Not cheap, but neither is a date with Taylor Swift!

 

[Pronto]

Are you using a closed system? If so you can take the line going to the intake pipe and route it to the other valve cover and skip the Tee. That will give you fresh air in the block under vacuum and help evac the block at high rpm.

 

[0-60n4]

Ah - Great Idea. Thanks

 

[0-60n4]

Ah - Great Idea. Thanks

Oh, I forgot to mention: I have the exhaust scavenging evacuation system on both valve covers to the exhaust.
https://www.amazon.com/dp/B003BZX4F4?psc=1&ref=ppx_yo2ov_dt_b_product_details

so not sure how that would work together.

 

[0-60n4]

But I think it will still work together as you said. The exhaust tube has a check valve so exhaust can't come back up to the intake

 

[Pronto]

Mightymouse Catch Cans

Custom catch cans and complete crankcase ventilation systems for performance, specializing in high power, high flow oil consumption and pressure solutions.

www.mightymousesolutions.com

Take a gander at Dave's site. His stuff works.
He's also got some good test data on various set ups.
Not cheap, but neither is a date with Taylor Swift!

Chuck, I looked closely at MM and they had a nice solution but the packaging was too big for my engine compartment. I just couldn't find a good spot for it. If you are using one could you post a picture of it's location? I would switch to one if I could fine a nice spot for it.

 

[Clark6]

Chuck, I looked closely at MM and they had a nice solution but the packaging was too big for my engine compartment. I just couldn't find a good spot for it. If you are using one could you post a picture of it's location? I would switch to one if I could fine a nice spot for it.

I use Motion Race Works Pronto,, works Great! I Even left A review on their site. Motion Raceworks Top Loader Billet Catch Can KIT 32-100K its right under the radiator hose.

 

[Pronto]

Ah, I didn't think about that spot. Are you still running the pcv too?

 

[Clark6]

Ah, I didn't think about that spot. Are you still running the pcv too?

Yes with a heavy duty check valve.100psi i think plastic type deal.

 

[Pronto]

Hey Clark6, did you use push in AN fitting into your valve covers? I was looking at weld on bungs and then thought how do you fill the oil so I see the using the push in style. Do you have to remove the can to drain? I'd hate for oil to spill down into the radiator support when draining.

 

[Chuck Leeper]

Sorry, pics are gone with last crash....