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C8Z PCV system tech?

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Old Oct 25, 2023 | 01:34 PM
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Default C8Z PCV system catch can from MMS.

*UPDATE*
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https://www.mightymousesolutions.com...ge/c8-z06-mild
Please contact me with your boost builds so that we can get a review going for our upcoming "Wild" system.


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Last edited by David@MMS; Oct 1, 2024 at 12:17 PM.
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Old Oct 25, 2023 | 07:46 PM
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How would a catch can work on a sealed system like the LT6? The crankcase and above-the-head cam/valve cover areas run in negative pressure (vacuum) pulled by the 6-stage scavenger pump. Any ventilation to atmosphere would defeat the function of the oil system.
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Old Oct 25, 2023 | 08:07 PM
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Blowby air is pumped from the pan to the intake manifold, with the goal of removing as much oil from the air as possible along the way.

We aim to remove any remaining oil from the blowby line(s) between the top of the oil tank and the intake manifold, with the bonus of including auxillary crankcase pressure release as needed.
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Old Oct 26, 2023 | 12:33 PM
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Originally Posted by David@MMS
Blowby air is pumped from the pan to the intake manifold, with the goal of removing as much oil from the air as possible along the way.

We aim to remove any remaining oil from the blowby line(s) between the top of the oil tank and the intake manifold, with the bonus of including auxillary crankcase pressure release as needed.
Thanks, I think the term PCV was tripping me up.
The 6 scavenger pump stages pull the oil and gasses from the 4 sealed crankcase bays, the head drains, and the front cover, so the entire engine is sealed and runs at negative pressure created by the scavenger pump independent of intake manifold vacuum.
The output of the scavenger stages is plumbed to the oil tank.

I see now you are talking about the ventilation of the oil tank, not the crankcase directly, to the intake manifold.
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Old Oct 26, 2023 | 01:01 PM
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right

blowby + oil gets pumped out of the sealed lower

the oil tank tank does a rough job of separating the blowby from the oil pumped into it
the bottom side of the tank is mostly air free oil for the engine
the top side of the tank is mostly oil free air, where all the pumped in blowby is released to the separately sealed upper
this crosses the cylinder heads in a 'pcv'-like sweep toward this box on the opposite valve cover
-where I presume this box does more work to remove oil, possibly regulate the return in some fashion, then
it is drawn / pumped into the intake manifold
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Old Oct 1, 2024 | 09:55 AM
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Originally Posted by David@MMS
Blowby air is pumped from the pan to the intake manifold, with the goal of removing as much oil from the air as possible along the way.

We aim to remove any remaining oil from the blowby line(s) between the top of the oil tank and the intake manifold, with the bonus of including auxillary crankcase pressure release as needed.
I will say after having a bunch of z06 intakes off there is a LOT of oil that still makes it into them. So further catch can / some form of aftermarket solution would probably benefit performance.
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Old Oct 1, 2024 | 10:26 AM
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Improved Racing sells a catch can for the C8 Z06 HTCs and they are a supporting vendor as well.

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