Henry3959

All I can say is read rather than argue.
There is more than you think to a PCV system.
http://www.engineprofessional.com/ar...Q315_34-44.pdf

Stumpalump

Hold on big guy this is Cobalt SS.net. We need to start here:

Henry3959

Now I get it...

jdbaugh1

iTrader: (1)

We know that on NA Ecotecs the PCV system is far from complex. they have no check valve and have a fixed restriction device. Then on an LSJ, that has nothing different other than a check valve in the IM (may have dynamic metering or may have fixed metering with a check valve that has a primary function of stopping backflow because of boost) The latter makes sense because why would the LSJ PCV system need the added complexity over it's NA siblings? If fixed metering works fine on the L61, which isn't much different conceptually than the LSJ other than a supercharger, why is it so stupid to imagine maybe it ALSO has a fixed metering device and they added a check valve because of the supercharger making boost?

We get that on many typical PCV systems the PCV valve does actually have dynamic metering. But are you sure that is the case on Ecotecs? We know that isn't the case for NA Ecotecs, so what documentation do you have, that we don't, that proves LSJ Ecotecs actually have dynamic metering and that the valve in the IM is anything but a simple check valve?

Henry3959

Good to see you have picked up some knowledge since yesterday. At least you are agreeing today that they are metering devices.

jdbaugh1

iTrader: (1)

I think you must have misunderstood me. I never claimed there was no metering, I said the metering was fixed via orifice size and that the valve part of it is just a check valve. I still don't think the valve dynamically modulates flow like other PCV systems. So my conceptual understanding of how the system works hasnt really changed.

Henry3959

Originally Posted by jdbaugh1
Pretty sure it is just a check valve from the crank case into the intake manifold. Check valve is open under vacuum and closed under boost. Under vacuum fresh air can only enter through the breather port on the valve cover. Under vacuum crank case air is sucked into the intake manifold and that air mass is replaced by blowby gasses and fresh air through the valve cover. As far as I know, the only metering mechanism is the orifice size in the head. The valve in the IM is simply a check valve and doesn't do any sort of metering.

jdbaugh1

iTrader: (1)

Did you read the sentence directly above the one you highlighted in red? Also do you know what conceptual means? The concept of how the system functions does not care if the metering orifice is in the head or intake manifold.

Henry3959

The hole in the head is a passage. The PCV valve is the metering device.

Slowbalt2000

iTrader: (1)

Play nice boys

jdbaugh1

iTrader: (1)

Dammit slowbalt dont delete my whole comment explaining that on a conceptual level the orifice(metering device) being in the head or IM makes no difference. I can edit out the part of my comment that was a little snarky. It was definitely PG though

Henry3959

My bad... I'm still trying to figure out how he misunderstood the conceptual function of the PCV valve with the empirical data he was given.

jdbaugh1

iTrader: (1)

Delete

Henry3959

I think you misunderstood the empirical data

jdbaugh1

iTrader: (1)

No I misread your comment, which is why my comment says delete but for some reason my comments only get deleted when they ruffle your feathers.

Henry3959

Go to bed JD.... you are sounding delirious

jdbaugh1

iTrader: (1)

You are such a douche. Lucky you have slowbalt to clean everything up for you when you make youself look like a complete asshat

07MetallicSC

iTrader: (16)

Same players different day. This is getting old.