dannobre

iTrader: (3)

I just installed mine yesterday...problem is it whistles like hell through the small vent hole in the lid when in boost...going to have to call Scott on that

tdiddy

Thanks and keep me informed. I have not gone into boost yet. Hell, I haven't even started the car since I installed the canister trio and I never looked at the lid close enuff to notice the hole.

dannobre

iTrader: (3)

Actually I thought about it and I know what is happening....duh...I need a one way check valve from the manifold nipple on the back of the manifold to the catch can line...otherwise the can gets pressurized when the manifold goes into boost

It also pressurized the crankcase for better name for it and spewed a bunch of oil.....

tdiddy

You have the catch can connected to the UIM?

dannobre

iTrader: (3)

I know now that I am an idiot I just pulled out the spare UIM and looked at where the nipple is...it is on the oil filler part of the manifold...and shouldn't pressurize..now I need to go and figure out WTF I did when I was plumbing he lines yesterday

Maybe I have the hoses mixed up?

sosonic

That is not true they do have breather catch cans. They appear to be their own category, though you could make a catch can and have a filter instead of a hose at the other end. However, it appears a breather catch can should work a bit differently.

This is the one for the mini cooper.

http://new.minimania.com/web/Display...s/ArticleV.cfm

http://new.minimania.com/InvDetail.cfm?Item=nme4512 (it does not show the breather filter, but explains it is included and goes on top).


I've also seen other examples, which got me curious:


http://www.roadraceengineering.com/i...structions.htm




http://volvospeed.com/Reviews/jazbreather.htm




http://www.importscene.com.au/prod764.htm

NgoRX8

iTrader: (1)

mysql never said they didn't have breather catch cans. the OP already showed that they exist.

i believe what he means is you shouldn't run it to the intake with a breather. you'll be messing up the flow because of the vented air.

so with a breather catch can, you wouldn't have use for the 2nd nipple anyways.

mysql

You took my reply out of context. I answered this question:

"I can't find one that has a breather on it, like MM's. Anybody know where to find one, hopefully for a decent price?"

What MM and myself have, are regular catch cans, with $10 breather filters installed. No need to look for a catch can that also happens to have a breather on it. In fact, for our application, once you have a breather, there's no point in also routing the hose back into the intake. Oil vapor in the intake is exactly what we want to avoid.

sosonic

Oh sorry.

I have the catch can and breather set up too. I think the breather catch can is an option. They can be an option in terms of worrying about excessive oil overflow to a catch can (though a large one would have no issue) and you may be venting less oil vapors. Of course its very debatable what their advantage is over catch can and breather, but then again dyno and performance are the ultimate judge.

However, they do look kind of cool.

mysql101

heh. I know what would look even cooler.

An oil catch can breather with two breathers. Just need some PVC piping and...

sosonic

Word. I need to find white PVC though and 2 blue filters. I need it to be even cooler.

tdiddy

I can help you out but I need to take a picture and I don't have my camera. Can you wait a couple of days? Otherwise, I can try to explain both how Scott told me to install the canister set and how I installed it. They are slightly different but serve the same purpose. Let me know.

Butters

iTrader: (1)

Ok guys, been reading a lot about oil catch cans, oil catch/breather cans, etc this morning. Still kinda confused as to what the best solution is.

It seems like the purpose of the mod is to prevent blow back/oil evap from being piped back into the intake, as well as catching oil overfill on the owner's part.

I don't understand why some have placed a filter/breather on their catch cans. This is to prevent oil vapors from venting into the atmostphere. Is there a problem with not venting it at all? What happens if the oil catch can is a dead end? Meaning, you route the overfill hose to the oi catch can and just plug up the little intake port on the air intake. Is it because you are trying to prevent the oil fumes from the oil catch can from going back into the oil filler tube? Am I making sense?

If I got this all straight in my head, it seems like a filtered/breathing oil catch can placed in-line between the oil filler tube and the intake would be the ideal solution. (Provided the filter/breather on the oil catch can did its job of filtering out any particulate/oil in the recirculated air.) But then we get into the issue of whether or not it's good to introduce the heated air from the oil catch can into your cold air intake.

Can someone please help a newb suss this stuff out?

laythor

The catch can is simply a place for oil and oil/vapor to go, instead of back into your intake. The reason people are using a filtered breather is to keep oil/vapor from condensing inside of their engine bays.

Butters

iTrader: (1)

Wait. But if you're just using a catch can that is a dead end and there's nowhere else for the oil/vapor to go, why would a filter be needed?

quazmosis

iTrader: (2)

A little thread resurection. Are cans/breathers only for FI applications, or should a NA fella like me have one?

Butters

iTrader: (1)

The oil/vapor overflow problem affects both.

Butters

iTrader: (1)

So my question still stands... If you're just using a catch can that is a dead end and there's nowhere else for the oil/vapor to go, why would a filter be needed?

Flashwing

I use one for an N/A application and have found oil in the catch can even when it's properly filled.

It keeps the oil out of my intake and off of my MAF which is all I care about. It might be more of a protection from myself since I have overfilled my oil once in the past.

I don't use a filter on mine, I run the other tube right back into the intake.

quazmosis

iTrader: (2)

Well I'm sold. Where can I get a catch can? I remember mazsport had a 3 can dealy that looked nice. But we all know I can't get one of them anymore.

Razz1

Just use a filter. put it on the oil tube you use to fill oil. Plug the end that goes to the intake.

Simple. Inexpensive.

Butters

iTrader: (1)

I'm sorry, guys. I hate to sound like a broken record, but I'm still wondering about this above question. If it has been answered before, just point me to the right post and I'll stop asking....

StealthTL

iTrader: (1)

Butterguy -

The hose that you are using is the vent from the 'crank'case, and when the car is working, the gases that pass the rotor into the oil side need to be vented off.

Old systems just recycle it into the intake manifold, newer cars use a vacuum source to actually pull the vapors in. (a PCV valve)

If your can is a dead end, the whole system will pressure up - it can blow the front or rear seals, force oil out of the 'O' ring at the plastic/metal oil fill joint, oil pan gasket, or just pop a hose. The engine oil will get milky from water building up in the oil and your bearings will go bye-bye. You need to send this oily steam somewhere, the intake is the best place, but on to the garage floor is also an option.

S

Butters

iTrader: (1)

Ah. Now I see. Pressure build-up. So the ideal thing would be to have a system that filters out the oily stuff in the "steam" and then pass that steam sans-oil to the intake.

What say you guys about feeding this (presumably) hot air into your intake?

fastlaneracing

No, you put a breather filter there instead and block the intake.

No oil our fumes to the intake and there is no risk of pressurise your engine.