ebay oil catch can for sr20det

[240srdet]

i am going to be ordering a catch can for sr. i cant decide between these two on ebay. they are both for about the same price.

http://cgi.ebay.com/ebaymotors/Oil-Reservoir-Catch-Can-Tank-240SX-300Z-350Z-G35-SILVER_W0QQcmdZViewItemQQcategoryZ6778QQihZ019QQit emZ290204476076QQrdZ1QQsspagenameZWDVW

http://cgi.ebay.com/ebaymotors/Oil-Reservoir-Catch-Can-Tank-240SX-300Z-350Z-G35-New_W0QQcmdZViewItemQQcategoryZ133200QQihZ017QQite mZ270209222431QQrdZ1QQsspagenameZWDVW

the 2nd one looks bigger and more attractive. also from what i searched up on here, this is how i should connect the catch can.

pcv valve left side of the T --> oil catch --> hole in intake after the mafs

someone told me i dont need to hook up the other side to the intake.

[uthemofo]

yes you are correct, just go from the left side of the pcv T as you stated to the catch can. You don't need to run it back to the intake, waste of time. and those are both wanna be greddy and they will both work fine, so its just what shape you want. haha

[nicku]

when will we need a catch can? I mean when is it necessary for us to have an aftermarket catch can? Why cant we keep using the stock one>

[240srdet]

when will we need a catch can? I mean when is it necessary for us to have an aftermarket catch can? Why cant we keep using the stock one>

i couldnt see where is my stock one? is it suppose to be hooked up to the right side of the T from the pcv valve

[nicku]

yeah its a black box thingy

[Pepperoni]

nicku, most people get rid of the stock "catch" can when they get an aftermarket manifold. No room for it.

To the OP, most catch cans are the same. What bothers me the most is that they don't have anything inside to "catch" the oil/residue; most catch cans are hollow, but they're better than nothing. I'm actually working on a catch can that does act as a filter between the valve cover and the intake.

But if you're looking to buy one for your SR, my recommendation:
-At least 15mm nipples.
-Route back to the intake.

[240srdet]

nicku, most people get rid of the stock "catch" can when they get an aftermarket manifold. No room for it.

To the OP, my recommendation:
-At least 15mm nipples.
-Route back to the intake.

can you show me some pics of what a nipple is?

also yea i think i dont have the stock one anymore since i have the megan manifold and the right side of the pcv goes down towards backside of the block. i have to look clearer to see where does it go.

[Pepperoni]

can you show me some pics of what a nipple is?

also yea i think i dont have the stock one anymore since i have the megan manifold and the right side of the pcv goes down towards backside of the block. i have to look clearer to see where does it go.

I'd ask you to google pics for "nipple", but.. nevermind :)

A "nipple" in this case is what you connect the hose to, aka a fitting.

[tt99ol]

the catch can does not necessarily need a filter element
the can is supposed to be mounted in a cooler location than the engine causing the hot oily air to condense and stick to the inside of the can.
please do your self a favor and route the other line back into the intake as doing this will remove pressure from the crank case making it easier for your engine to rev up and freeing up some hp.
the stock can is a joke, its in the wrong place altogether

[240srdet]

so the 15mm fitting you are recommending should be the fitting on the catch can? if not where are you describing for the fitting? (sound like such a newbie question i just want to be 100% sure that you are talking about that fitting) any way you can tell by pics cause mostly the guy ebaying wouldnt even bother to answer if i asked him that

[cotbu]

Most catch cans will catch excessive oil but fail at the vapors... the vapors the vapors!... ;)flashback
I'd like to see a series of baffles or some kind filter element inside.

[smelly240]

make sure u get a nice baffled catch can - then u will catch vapor.

go search freshalloy - having a line to the intake is proper and you'll be better with it.

a lot of them are baffled. ebay brands suck.

[hotlavaflow]

Most people stuff steel wool (without soap lol) in the catch can and it acts as a really good filter. It works way better than an empty catch.

[xelitex]

You should get the one that says JDM on it...thats tyte..jk =P

[njd07]

yes you are correct, just go from the left side of the pcv T as you stated to the catch can. You don't need to run it back to the intake, waste of time. and those are both wanna be greddy and they will both work fine, so its just what shape you want. haha

wtf..dont do that. whats the point of running a catch can if you arent gonna run it back into the intake...if your not gonna run back to the intake just install one of those small breather filters.

[smelly240]

uthemofo needs to learn before he tells people whats up

[240srdet]

can anyone give me a link to a catch can that opens up so i can baffle it. (i prefer not to spend too much on it)

[emersonLP]

Is there any difference between these 2 scenarios?

1) Crankcase--->catch can--->intake

2) crank case--->catch can-Breather on nipple 2

[beetlejuice]

Is there any difference between these 2 scenarios?

1) Crankcase--->catch can--->intake

2) crank case--->catch can-Breather on nipple 2

1) The air intake will help to evacuate the vapors from your valve cover...but the air entering your turbo, intercooler, and eventually combustion chamber will be tainted with dirty, oily, stinky, air.

2) Mine is set up this way because I want the air going into my engine to be taintless. In this scenario, the catch can will "catch" any oily residue, but will also allow the valve cover to "breathe" without dripping oily residue everywhere. Just make sure your catch can (and hose) is downhill from your valve cover breather.

[Pepperoni]

I don't agree nor do I disagree with you about running a breather filter. I suppose it's personal preference, but in my experience, it's better to connect it back to the intake. Having a breather filter could mean letting in unmetered air into your crankcase.

For more info, check out:
http://www.zilvia.net/f/showthread.php?t=110993

[uthemofo]

smelly240 (http://www.zilvia.net/f/member.php?u=50647)- shut the fuck up...seriously, wtf??? who are you? I have an sr in my car which i beat the shit out of and i just run a monster can as my catch can, its fine not necessary to run it back to intake.

[emersonLP]

So the ideal situation would be to run a catch can with either a filtering element inside (like steel wool or baffles) run to the intake. Because the intake will provide better suction than simply slapping a breather on the catch can.

[tt99ol]

yes that is correct

[JDMClifford]

dead on! thats a perfect statement/awnser.

So the ideal situation would be to run a catch can with either a filtering element inside (like steel wool or baffles) run to the intake. Because the intake will provide better suction than simply slapping a breather on the catch can.

[beetlejuice]

I wouldn't call oily vapor in my turbo, piping, intercooler, intake manifold, and combustion chamber ideal.

However, to each his own.

Good luck either way.

[Sellek83]

Having your breather pipe connected to your inlet tract provides a vacuum, this vacuum draws the gases from the crank case making it the most efficient setup to reduce crank case pressure. A decent baffled catch can should be CATCHING the oil vapour as it passes through the can whilst the air continues to the inlet. These gases may not be fresh clean air but if your running a cold air intake this will completely overwhelm the amount of air coming from the can, and dilute it so much with clean air it will not make a difference.

The vacuum is the reason why ALL engines are plumbed this way from the factory, it's simply the most effective way to reduce crank case pressure.

As soon as you add a filter(a way for air to enter or exit) the vacuum is lost.

[Sellek83]

yes you are correct, just go from the left side of the pcv T as you stated to the catch can. You don't need to run it back to the intake, waste of time. and those are both wanna be greddy and they will both work fine, so its just what shape you want. haha

Having your breather pipe connected to your inlet tract provides a vacuum, this vacuum draws the gases from the crank case making it the most efficient setup to reduce crank case pressure. A decent baffled catch can should be CATCHING the oil vapour as it passes through the can whilst the air continues to the inlet. These gases may not be fresh clean air but if your running a cold air intake this will completely overwhelm the amount of air coming from the can, and dilute it so much with clean air it will not make a difference.

The vacuum is the reason why ALL engines are plumbed this way from the factory, it's simply the most effective way to reduce crank case pressure.

As soon as you add a filter(a way for air to enter or exit) the vacuum is lost.

[D.Adams]

Having your breather pipe connected to your inlet tract provides a vacuum, this vacuum draws the gases from the crank case making it the most efficient setup to reduce crank case pressure. A decent baffled catch can should be CATCHING the oil vapour as it passes through the can whilst the air continues to the inlet. These gases may not be fresh clean air but if your running a cold air intake this will completely overwhelm the amount of air coming from the can, and dilute it so much with clean air it will not make a difference.

The vacuum is the reason why ALL engines are plumbed this way from the factory, it's simply the most effective way to reduce crank case pressure.

As soon as you add a filter(a way for air to enter or exit) the vacuum is lost.

wow +1 to bumping a old thread man

[Sellek83]

wow +1 to bumping a old thread man

I felt this thread could do with some help as so many simply seem to be guessing when it comes to modifying there cars and this guess work mechanics could ultimately cause serious damage.

I was just trying to assist others, man.