Input from anyone filling up their oil catch cans

[Blwalker105]

I'm reaching out to any road racers (any variety) out there who are running wet sump systems and are filling up their catch cans after short periods of time. I'd be willing to give a pretty deep discount on my Arctangent Oil Control plate in exchange for track data. It's already been successfully track tested at NCM but that car had an AOS so detailed catch can data was not available.

PM me or email at [email protected].

[Gordon Levy]

Ether you have no baffles in the valve covers for your breather lines or you have a ton of blow by.

[EODTech87]

Ether you have no baffles in the valve covers for your breather lines or you have a ton of blow by.

He's talking about the 818.

[mikeinatlanta]

I'm assuming that this question is for product development? One thing that has worked well on a motorcycle for me is a catch can system that self drains back to the case. Recently tested well on a 24 hour event. I've never really understood why more catch cans don't do this.

[Hobby Racer]

I'm assuming that this question is for product development? One thing that has worked well on a motorcycle for me is a catch can system that self drains back to the case. Recently tested well on a 24 hour event. I've never really understood why more catch cans don't do this.

Usually because the oil in the catch can also contains emulsified water and combustion gas junk from the blow by. Not stuff you want recirculating in the motor.

[Mitch Wright]

I don't have an issue and I have a lot of laps on my car. I run a Crawford AOS that does drain back, a KillerBee Oil Control valve and pan along with Bill's trick Arctangent Oil Control plate. As a side note my TMIC is also dry.

[mikeinatlanta]

Usually because the oil in the catch can also contains emulsified water and combustion gas junk from the blow by. Not stuff you want recirculating in the motor.

What's in the catch can came from the case. Water is a normal byproduct of combustion and heat in the oil will quickly boil it off. What's happening in the can is no different that what is happening in the case except that it is allowed to sit for weeks and build up. If you have issues with excess emulsified water in the can you have bigger problems than that little bit draining back to where it came from. RE Combustion Gas: Catch cans don't fill up with gas, they fill with atomized oil. Separating atomized oil from the blow by is kind of the whole point of a catch can. Basically, the can contains nothing you don't already have in much greater quantity in your case.

[Bob_n_Cincy]

The Subaru engine block has a built in AOS that drains back to the oil pan.

aos.jpg

On my dry sump system, all my engine vents are connected back to the top of my dry sump tank.

[Blwalker105]

What's in the catch can came from the case. Water is a normal byproduct of combustion and heat in the oil will quickly boil it off. What's happening in the can is no different that what is happening in the case except that it is allowed to sit for weeks and build up. If you have issues with excess emulsified water in the can you have bigger problems than that little bit draining back to where it came from. RE Combustion Gas: Catch cans don't fill up with gas, they fill with atomized oil. Separating atomized oil from the blow by is kind of the whole point of a catch can. Basically, the can contains nothing you don't already have in much greater quantity in your case.

Crankcase gasses inside the engine are very hot as they’re redrawn into the intake system. By design, catch cans are nothing more than condensers and the condensate that returns to your engine is not just oil, but a nasty emulsion full of moisture, acids, combustion byproducts and other nasty grunge. In my opinion, the only acceptable ones are heated by the vehicle’s cooling system. These minimize the temperature difference and thus the condensing effect.

[Blwalker105]

Actually, my bad: I was actually speaking of Air Oil Separators. Catch can contents are never meant to go back into the engine.

[SixStar]

Typically if the vehicle is pushing that much oil something is wrong.

I'm running an IAG Competition Series AOS on my 818R.... it's in that mess of hoses and lines.....

Ln6mtck.jpg