The need of a oil catch tank...

[davey90]

hey guys, so I've seen quite a few 86s/BRZs and other Jap imports have oil catch tanks fitted to their car. I've done a bit of research and noticed that they keep your engine side of things neat and tidy. My question is... would you guys recommend an oil catchment tank?

Also, not sure if I'll catch anything if i do commit to installing one, the article says...
"the most common reason catch cans don't catch anything is that air flow through them is too smooth to cause the oil to condense while it passes through the can. Some sort of filtering media is often needed to help sort this out."

Filtering Media - People have used a lot of different things as filtering media. Foam lawnmower filters are a safe and popular choice.

If you decide to use media that's made of metal (steel wool, chain, etc) and have a metal catch can, be sure that they're made of the same stuff. They'll corrode if they're not, and you don't want the resulting debris being fed into your motor.

so yeah, would you guys recommend an oil catchment tank? not sure if i need one...

[nix]

You only need one if you go FI. It won't hurt to install one now but there won't really be much/any blow by until it's boosted. The cusco one is unbaffled and pretty crap. Crawford do a nice recirculating one or there are a lot of quality drainable ones just do a bit of research first.

[Turdinator]

Originally Posted by nix

You only need one if you go FI. It won't hurt to install one now but there won't really be much/any blow by until it's boosted. The cusco one is unbaffled and pretty crap. Crawford do a nice recirculating one or there are a lot of quality drainable ones just do a bit of research first.

I'm not sure where the idea that they are only worth while on boosted engines came from. All engines have some blowby and the less that goes back into the intake the better. Have a look at the link below. It is an installation thread but he also shows how much crap it catches after a few thousand miles. I will be putting one on my car in the new year.

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

[nix]

Yes you're right, but I was talking need. Once you have positive pressure blow by increases dramatically and you must protect the intercooler from it. If the core gets fully choked up with oil it can become nearly useless.

Great link btw!!

PS.. Anyone notice this meme of putting lego in the background of bokeh shots? lol .. see it from a lot of Texans.

[Palmy]

FYI they're illegal in NSW.

[a.beck]

Seriously? That strikes me as a pretty silly law. Any idea what the reasoning is?

[nix]

I know vented systems are illegal in most of AU pretty surprised if a closed / recirc one is tho?

[JP]

The catch can on my forester was legal and engineered in NSW, it wasn't vented to atmosphere though.

I'm making my own with internal baffle system to fit in the gap between the battery and strut bar. ~3.2L volume with black pushlock AN fittings & hose. Only going with a single setup at the moment plumbed into the PCV line that runs to the back of the intake manifold. I'll be leaving the inlet breather alone for the moment.

The PCV line is where most of the oil vapour gets introduced to the intake manifold.

[davey90]

Originally Posted by Palmy

FYI they're illegal in NSW.

I took a look around the web about it being "illegal in NSW" and Yes, over all it is a defect. If the Cops know their way around an engine, then you're safe. if they don't know what's going on under the hood, they're most likely going to defect you for it. so I guess it all comes down on luck?

well i guess i won't be fitting one due to defect. don't want to run into any trouble with the cops.

[t0dd]

Originally Posted by davey90

I took a look around the web about it being "illegal in NSW" and Yes, over all it is a defect. If the Cops know their way around an engine, then you're safe. if they don't what's going on under the hood they're going to defect you for it. so I guess it all comes down on luck?

well i guess i won't be fitting one due to defect. don't want to run into any trouble with the cops.

From what I had read it was a defect if it vented to atmosphere, but not if it connects back in. Kinda like a BOV?

[JP]

exactly. I'd rather run a closed-system catch can and run the gauntlet of an encounter with an uninformed cop than have that crap contaminate my combustion chamber and coke up the pistons/valves.

If a cop did sticker you for a closed-system catch can, it's really easy to clear.

[Turdinator]

Originally Posted by JP

The catch can on my forester was legal and engineered in NSW, it wasn't vented to atmosphere though.

I'm making my own with internal baffle system to fit in the gap between the battery and strut bar. ~3.2L volume with black pushlock AN fittings & hose. Only going with a single setup at the moment plumbed into the PCV line that runs to the back of the intake manifold. I'll be leaving the inlet breather alone for the moment.

The PCV line is where most of the oil vapour gets introduced to the intake manifold.

Sounds interesting. Would love to see pics of the finished product. Would you consider making multiples and selling them?

[Panman]

Originally Posted by Turdinator

Sounds interesting. Would love to see pics of the finished product. Would you consider making multiples and selling them?

He's busy doing up my fire extinguisher bracket!. (Or should be @JP ).

[JP]

Bracket will be done tomorrow

I've got my catch can tacked up now and the port locations figured out, just finishing the design for the baffles