I had a can on my C5 LS3 race car. It ran 3500-6500 rpm for 20 minute sessions on the track.
I don't think I need one for my C8 since it is a street car, and I only run thru the gears one or two times a day.

If you are going to road race track days it may be worth adding.

 

Yep, concerned about BMW, Ferrari etc having "coking" issues with their high hp DI engines when I got my 2014 Z51, GM's first high hp DI, so installed a catch can. Captured about 1 oz/1000 miles that I emptied, collected and tossed in the container I used for my oil changes and dumped at our local engine oil collection location.

Then when I got my 2017 Grand Sport, found GM made major changes to the PVC system in that other wise the same dry sump LT1 engine. I took the Elite dry sump catch can and installed on my 2017 AFTER assuring I was doing no harm by analyzing the many new PCV lines that were reducing blowby going into the intake manifold. Collect less than half the amount of oil and a very small amount. If fact several sources noted a small amount of oil helps lubricate the Intake valve stem! Removed the catch can, no need for my street driving.

Then Don Sherman pointed out the method the GM engineers used in the C8 dry sump to deal with PVC blowby entering the intake manifold. He referred to it as a form of catch can. Yep the GM engineers gained knowledge and applied to the new LT2. So, IMO unless tracking where their MAY BE some benefit with a high % WOT, not needed.

GM made major changes to LT1 dry sump PVC system on my 2017 Grand Sport (started with 2016 Z06.) Were using a system similar to the LT1 in the Camaro where they dumped PCV blowby oil back in the engine.


After checking to be sure I was doing no harm Installed the Elite Catch Can I removed from my 2014 C7 Z51 that was collecting ~1oz/oil/1000 miles i added to my 2017 Grand Sport. Was collecting less than half the amount of oil and found some small amount if useful in DI engines to help lubricate the intake valve steam! Removed the Catch Can from my 2017 Grand Sport.



For the C8 Don Sherman, engineer excellent automotive writer with inside contacts at GM showed the LT2 in the dry sump C8 tank uses a form of catch can to return PCV collected oil back to the crankcase, Yep GM engineers gained knowledge and IMO no need to add a Catch Can. IF Tracking and driving with a high % WOT MIGHT BE SOME benefit?

 

 

So, I don't have a catch can and don't plan to get one for my un-modified, non-tracked C8. And I will continue to refrain from commenting on whether it helps or not (anything I say there would just be my opinion). But I'm not so sure about the analogy between the catch can and the air oil separator in the oil tank on the front of the engine. Best to just describe what is there. So,,,

In the attached illustration, the blue tube runs between intake, ahead of the throttle body, and into the left and right rocker arm covers - it provides fresh, filtered air to crankcase. The red tube, between the existing air - oil separator in the engine valley runs to intake manifold (below the throttle body). The PCV valve is in this path. This provides (most of the time) the vacuum necessary to draw the crankcase gasses (including mist which consists of oil and as noted, blow by products that are in vapor or gas form) into the intake manifold, past the intake valve, into the combustion chamber, where its "burned". This is the path where the catch can goes. The yellow tube is a vent from another centrifugal air/oil separator in the oil tank. Oil that is scavenged from the oil pan and the engine valley is returned to the oil tank and it passes through that air oil separator in the tank. The separated vapor passes through the yellow tube and into the left and right rocker arm covers, into the crankcase.

So there are two "self-draining" air oil separators in the system - one in the oil tank for oil that is being returned from the engine valley and the oil pan to the tank - and one in the engine valley that feeds the red tube - where the catch can would be installed. When the catch can is installed, it is capturing material that made it past the existing air-oil separator in the engine valley.

 

^^^
Yep I just quote Don Sherman who notes in the top of the LT2 dry sump tank some of the pvc crankcase blowby drains back to the engine oil as they did in the LT1 in the Camaro. For those not familiar with that system; Here is Tadge Juechter's answer to that question in 2016 AFTER they improved the LT1 Dry Sump Corvette system:

Maxie2U asked:
Why did the Camaro design team decide to design in an Oil Catch Can on the 2016 Camaro with the LT1 engine? Will the 2017 C7 with LT1 engines also come with an Oil Catch Can, if not why not?
Quote:
Tadge answered:
To answer the second question first: No, the 2017 Corvette LT1 will not have the Camaro V8 PCV air/oil separator (what the questioner calls a "catch can") added to its oil management system. For those not familiar with the abbreviation PCV, it stands for "positive crankcase ventilation"

Even though the Corvette and Camaro share the LT1, they are very different in execution detail. The LT1 in the Corvette sits lower and very close to the ground to enable an industry-leading low profile hood and good sight lines despite a very low seated position. Having the engine close to the ground is great for keeping the vehicle's center of gravity down, but means the oil pan is relatively shallow. Having little depth in the oil pan means it is very challenging to scavenge oil in high G loading conditions. For this reason we add dry sump lubrication to our high performance models. The Camaro's higher engine position allows for a deeper oil pan and a reliable configuration for picking up oil for delivery to all parts of the engine. Thus the Camaro is able to avoid the cost and mass of the dry sump tank and resulting complexity of the lube system.

The Corvette's dry sump tank looks relatively simple on the outside but the internals are really quite complex. The top third of the tank contains a PCV air/oil separation system. On the Corvette, PCV lines route from the valve covers to the air/oil separator on top of our dry sump tank. Oil from PCV air is separated and returned to the lube system through the oil tank.
The PCV separation system on Camaro V8 performs a similar function except oil is returned to the engine oil pan from the PCV separator's drain back tube. The Camaro V8 PCV air/oil separator is more complex than a "catch-can" since it not only separates oil from PCV air it provides a drain back path for this oil to be reused by the lube system. "Catch-can" systems that do not have a drain back path for separated oil run the risk of poor oil pressure performance over time as oil is removed from the lube system.

The bottom line is that both cars use optimized engineering solutions for their lube systems based on vehicle architectural considerations.

 

My neighbor's daughter has a modified Subaru with an aftermarket turbo. She added a recommended catch can. Hers actually does drain back to the pan, so at least some aftermarket ones do.

 

We have some great options from stock to wild, and are on many of the most powerful c8's around, and the go to for many of the most prominent build shops.

https://www.mightymousesolutions.com/cans-corvette
Happy to help answer any questions!

 

When I did my C6 FI build and tune I used Mighty Mouse CC. Absolutely the best and highest quality if you're going this route.