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Old 01-23-2014, 10:45 AM   #15
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Originally Posted by trueno86power View Post
Where do you read that i will drop the oil on the ground? Oil will be drop in the can...

Anyway, I want some info on who have done it... not that I should not do that!
If you're running a catch can that doesn't have a baffle or filter, you have the potential of oil coming through the outlet port on the can. If it's a separator type, it should technically just be air coming out so you may as well just run it back to the intake tube.

I could be mistaken, just adding my 2 cents
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Old 01-23-2014, 12:13 PM   #16
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There really are two different items here. Catch cans and air oil separators. Lots of catch cans out there are just shiny containers with an in and an out. They just hope to catch oil. Separators do what the name says, pull the oil out of the air. Usually with just simple baffles or some type of filter media. I built my own separator with a series of internal baffles like those stacking wooden dolls. Yes mine is VTA so there is nothing pulling it through but the entry ports are offset on the cylinder so it's designed to introduce a swirling motion inside the cylinder. Basic stuff. Since it's made of steel and not clear, sure there is a degree of guesses what's going on inside but I've made them before and never had an oily mess come out the filter. The filter does need to be washed now and then but nothing crazy. I've also done one that had a check valve connected to the exhaust. The exhaust gasses pulled the contents out of the container. That was an experiment and didn't seem to work any better then the VTA.
Thanks a lot for your help and comments. The catch that I'll installed will be a Cusco catch can, with no baffle inside. The only thing that left to see is if it will have oil leaking from the open port since it don't have baffle. Personaly I don't think so, since it's only oil vapors that commin' out.

And so you didn't have any engine related problem? Like bad idle? Your car is N/A or boosted?

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If you're running a catch can that doesn't have a baffle or filter, you have the potential of oil coming through the outlet port on the can. If it's a separator type, it should technically just be air coming out so you may as well just run it back to the intake tube.

I could be mistaken, just adding my 2 cents
I've already got a mini air filter to fit at the open output of the Cusco can
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Old 01-23-2014, 12:19 PM   #17
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I did this. When I was NA, I had it setup from the PCV valve, then back to the intake. When I installed the supercharger, I had to vent it to atmosphere because the old setup would cause boost leak. You would not believe how much oil it catches.



The first time I installed the cusco can, I had it set up wrong, going between the breather and intake. This would not catch anything.
Woha! Shit loads of oils collected! Did you keep the PCV valve ? Look like the oil is trapped inside the tube!
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Old 01-23-2014, 12:21 PM   #18
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i run a dual-vented setup, and it works just fine. no oil in my pipes, which is the whole point. there are theoretical drawbacks, particularly not creating vacuum in the crankcase at idle, but that's theoretical. in reality, it's just a damn catch can, and if there's no oil in your pipes, it works.
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Old 01-23-2014, 12:23 PM   #19
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Originally Posted by trueno86power View Post
Thanks a lot for your help and comments. The catch that I'll installed will be a Cusco catch can, with no baffle inside. The only thing that left to see is if it will have oil leaking from the open port since it don't have baffle. Personaly I don't think so, since it's only oil vapors that commin' out.

And so you didn't have any engine related problem? Like bad idle? Your car is N/A or boosted?

My BRZ is still in the works but it shouldn't be any different they the other systems I've built. If you hook it up correctly there should be no side effects. Also don't use huge hose, mine now uses 1/2" stainless hard lines. My car has a turbo but its shouldn't really matter, any engine with DI is going to be very touchy about oily pistons and I think as time goes on we will see issues around this.



These lines connect to the port under the AC compressor and the one under the back of the manifold. Those they connect to the inlets on the can. I will cap off the unused port left on the manifold and my intake piping does not have anything for that side so I don't need to worry.

Here is a shot from when I was making the can, these baffles now have a series of decreasing sized holes in each layer.



The concept is the oil clings to the walls and gravity pulls it to the bottom where is then goes into a hose that runs down the side of the tranny. The hose acts as the storage capacity and a handy drain. The air is left to vent out the top and that "exit" is only accessible from the inner most chamber, the cleanest. I like to use baffles instead of filter media because then the can needs to be able to open for cleaning. This design is solid state one hunk design. I'll drain it every so often and run solvent through.
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Old 01-23-2014, 02:03 PM   #20
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Woha! Shit loads of oils collected! Did you keep the PCV valve ? Look like the oil is trapped inside the tube!
Yes I kept the pcv valve. Yup the hose traps the oil. If you look closely, the oil residue comes out on the other side which is vented to atmosphere. That's the downside of the unbaffled cusco can.
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Old 01-23-2014, 02:06 PM   #21
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Originally Posted by kuhlka View Post
Breather to intake is what the instructions showed, but damn does it look like you're catching a lot more oil with your setup.
When I installed it between the breather, it caught almost nothing. After I hooked it up directly to the pcv valve, that's when all the junk got caught.
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Old 01-23-2014, 02:14 PM   #22
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I don't understand why this would be needed, UNLESS there is FI involved. Does it really make that much of a difference to have any type of catch can or AOS when NA?
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Old 01-23-2014, 02:26 PM   #23
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Oily pistons are not good, FI is just more prone to detonation so it needs that larger window. NA can still benefit but sure not as much
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Old 01-23-2014, 03:08 PM   #24
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I just prefer to keep my pistons clean even if I run N/A !
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Old 03-19-2014, 04:06 PM   #25
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Originally Posted by trueno86power View Post
I just prefer to keep my pistons clean even if I run N/A !
Did you connect your catch can like this?

http://www.ft86club.com/forums/showthread.php?t=21079

I connected it as the cusco manual shows and catch nothing.

lol.

Thank you!
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Old 03-21-2014, 08:34 PM   #26
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Did you connect your catch can like this?

http://www.ft86club.com/forums/showthread.php?t=21079

I connected it as the cusco manual shows and catch nothing.

lol.

Thank you!
Well I do for the breather parts...

For the rest, I've plugged the PCV valve, the manifold nipple (From the PCV) and completely removed the OEM tube PCV to manifold.

That way, all the vapor will go out by it self on the breather side and goes into the catch can

But you got to leave one port of the catch can open like they said on the Cusco manual.

I will repost later on for the results of this since my car is still in winter storage.
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Old 06-08-2017, 02:43 PM   #27
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Originally Posted by trueno86power View Post
Well I do for the breather parts...

For the rest, I've plugged the PCV valve, the manifold nipple (From the PCV) and completely removed the OEM tube PCV to manifold.

That way, all the vapor will go out by it self on the breather side and goes into the catch can

But you got to leave one port of the catch can open like they said on the Cusco manual.

I will repost later on for the results of this since my car is still in winter storage.
when you say you plugged the PCV, what do you mean?


I have both my Radium catch cans vented to atmosphere, no recirculation back into the intake, im having a vacuum leak at idle, would this cause it?
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Old 06-08-2017, 07:34 PM   #28
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Damn that's an old post from 2014 @Kris86 !

I've put a plug on the PCV, but I would not be forced to do that since a PCV only open with vacuum.

I don't think this is your issue ! Recheck if your plug for the intake port is okay, and check the brake booster vacuum hose too !
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