Catch Can

[kiahatsiu]

Well, as the topic suggests, I am in the market for a catch can. What are people running, how well does it and how easy was it to fit? I was just going to buy some ebay cheap thing as my car has no need for a cams approved one, but if anyone has any recommendations I am all ears. I understand Phat makes one..is it an off the shelf thing, or is it a made to order jobbie?
Any help or advise is appreciated.

[Robbks]

Keep it simple
I used a simple 2-port "Drift" catch-can at one point.

fill with lawnmower air filters
plumb into the area occupied by the hose that runs from the Crankcase breather and then into intake.

don;t worry about the head breathers, they should be left alone (or a second separate catch-can) to allow the factory breather system to operate correctly

but 90% of the blow-by comes out the crank-breather. as observed on both my last two turbo subies.

[B4ITZUP]

I'm using an AOS

highly recommended, easy to install and very very little maintenance

[Robbks]

I'm using an AOS.....very little maintenance

yeah nothing to maintain as is doesn't do much,
except ruin the operation of the factory breather system

[dr20t]

I highly recommend a phat catch can

Not just cos I have one, but because you can actually speak to the guy to tell him what you're after and he can tell you what will and won't work

I'm very happy with mine.

Case in point - I pulled my intake piping off the other day to look at something else. Car has been running for 9 months and 20,000kms like this now, and not ONE drop of oil in the intake

Especially important if you're looking to run e85 / e-flex

And yes it's a custom job

Mick

[kiahatsiu]

I am leaning towards the Phat can. My problem is that I am in the jungle at the moment sans (reliable) phone, and I want to have a few parts pre delivered the day I get home. I think I might just get my mate to run my car up to A&M on the sunshine coast and have Al make one for me and have him remind me how much I want an ez30 with a 4788 on it.

[dr20t]

Yeah fair enough

I'm sure phat has enough test dummy gen 4s at his disposal to be able to make one up for you without your car being there

Mick

[kiahatsiu]

Also Mick, is there any chance you could put up a few pictures of your phat one and where it connects to the breathers?
It might be a useful resource for future reference on the forums.

[dr20t]

Also Mick, is there any chance you could put up a few pictures of your phat one and where it connects to the breathers?
It might be a useful resource for future reference on the forums.

Yeah no dramas but can't do it in next couple f days so remind me early next week

Mick

[Robbks]

here is the Crankcase breather to PCV and crankcase breather to inlet hose arrangement.

you simply remove the hose (TO INLET) and insert your catch can.
it's that simple
the pic is from my MY99 GT Forester and is taken from the rear of the engine bay pointing forwards. you can see the turbo outlet to the extreme RH side, the other pipes are for BOV return
the graphic attached is the gen4. the hose (ITEM1) is a slightly different shape, but the same principle applies

inlet1.jpg (26.48 KiB) Viewed 3861 times

[senator]

Ian

Email Michael, he stocks are few catch cans kits he has found which are up too his standard……. Or just steal Coyotes’

[kiahatsiu]

Robbks, do you then run a tube back to the inlet, where that line would have plumbed in?

[Robbks]

yes.
Crank-breather> Hose> catch-can> hose> intake.
done.

[senator]

yes.
Crank-breather> Hose> catch-can> hose> intake.
done.

Does this arrangement ensure absolutely no oil returns into the intake system?

[kiahatsiu]

One would imagine some would still get through as vapor, but it would be improved.