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How Well Will This Work

Guest INASNT

By Guest INASNT,
in General Automotive Discussion

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Guest INASNT

Guest INASNT

Posted
Posted

attachment.php?s=&postid=136771

Ok its a catch can which i plan on running the two lines from the cam covers into each inlet of the can.

I was told if wont work as good as 1 with an atmo vent with filter in it so that it lets off pressure and the oil vapour out to the atmosphere not letting it go back into the intake to burn up like this can would!!

Also is has a little screw at the bottom which i assume can be used for draining any oil out or running a line back to the sump.

I know that greedy and apexi make catch cans like mine without the atmo ventilaton and filter!

So whats the story here?

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predator Grand Master

predator

Posted
Posted

Why are you so keen on getting one of them fitted? Isn't that more important for much higher HP than you currently have where the oil runs much hotter?

Mine is pretty much specc'ed up same as yours and i see no particular need for one.

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by predator666

Why are you so keen on getting one of them fitted? Isn't that more important for much higher HP than you currently have where the oil runs much hotter?

Mine is pretty much specc'ed up same as yours and i see no particular need for one.

coz i got it for free so i wanna use it!

u got the same type?

meggala Grand Master

meggala

Posted
Posted

your the engineer inasnt you should be explaining to us why it should work and dont give me any rubbish your an electrical engineer.

:P

I prefer the one like you have an pred they are good pull you cooler pipes off and have a look how much oil is in there

btw inasnt they are illegal

cheers

Gradenko Mentor

Gradenko

Posted
Posted
Originally posted by INASNT

I was told if wont work as good as 1 with an atmo vent with filter in it so that it lets off pressure and the oil vapour out to the atmosphere not letting it go back into the intake to burn up like this can would!!

Thats about right, without a vent to atmosphere the catch can won't be doing anything. It'll actually cause problems if its a sealed system, as pressure will build up under the rocker cover similar to when the pcv valve gets blocked. BTW, with only two nipples theres no provision to return oil vapour back into the intake to burn up.

Originally posted by predator666

Mine is pretty much specc'ed up same as yours and i see no particular need for one.

I find it indispensable. Really useful for not having oil gumming up the idle control valve, intake manifold and intercooler. Not to mention the knock saving properties of no oil in intake charge.

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by Gradenko

Thats about right, without a vent to atmosphere the catch can won't be doing anything. It'll actually cause problems if its a sealed system, as pressure will build up under the rocker cover similar to when the pcv valve gets blocked. BTW, with only two nipples theres no provision to return oil vapour back into the intake to burn up.

I find it indispensable. Really useful for not having oil gumming up the idle control valve, intake manifold and intercooler. Not to mention the knock saving properties of no oil in intake charge.

so u saying its useless?? the greddy and apexi 1'c are the same design tho!!

meggalla

i have to think to much at work, i CBF thinking when at home! :D

Illegal?? u already know i dont really care!! :P

Fast31 Collaborator

Fast31

Posted
Posted

the venting of the air has to be at the top otherwise you will get oil dripping out

The benefit of these are to stop oil contaminated air re entering the motor which reduces the chanced of detonation. Thay are pretty much a standard fitment to all turbo cars running decent boost.

Jay95R33 Grand Master

Jay95R33

Posted
Posted

I thought you'd run one hose from the cam covers (you know how they both run into one hose) to one nipple of the catch can, then the other nipple would feed back into the intake system.

The oil vapours get caught inside the can and the clean filtered air gets returned to the intake system.

And the screw on the bottom of the can is to drain the oil out when the level (as indicated in that glass tube up the side of it) gets too high??

A sealed system like this is legal, the filter ones are a no no.

Or am I totally off the mark?

Gradenko Mentor

Gradenko

Posted
Posted

Jay95R33, your completley correct. Thats the other way these things can be set up. I don't much car for legalities though, I want no trace of oil vapours (filtered or not) in my intake. :P The can INASNT has doesn't look like it filters though, the nipples are too close together to do that.

Jay95R33 Grand Master

Jay95R33

Posted
Posted

Yeah true. No vapours has gotta be better.

I've seen a cut away diagram of a Cucso one that was simular to the one in the pic, and it had three chambers in it, the first was where the cam cover came in, and that was open at the bottom to the middle chamber and the middle chamber was then open at the top to the third chamber which went back to the intake.

The middle chamber was packed full of this stainless wire stuff??

So the oil had to go down into the middle, then get trapped in the wire stuff, and the the clean(ish) air went up to the third part.

Looked cool, and pretty simple really.

Roy Grand Master

Roy

Posted
Posted
So the oil had to go down into the middle, then get trapped in the wire stuff, and the the clean(ish) air went up to the third part.

Thats how they work, and if you have ever seen the oil poored from these things after a track day then you know they work (it could have been the guys engine was pretty tired)

People like BOC Gases use the same principal in their gas scrubbers, so it is a process used with much more critical applications then automotive. It does work!

Either way i suppose it has the same effect, however as mentioned venting to atmosphere is illegal (come on guys & gals lets make some effort to get along with authorities:D ) and it leaves you engine bay with a pretty unsighlty film of oil, not to mention fumes.

You can fun a hose off the top down to the belly of the car, but again i dont know enough about the aerodynamics and flow to say the bottom of your car or worse the back wont get covered in a film of oil.

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by Jay95R33

Yeah true.  No vapours has gotta be better.

I've seen a cut away diagram of a Cucso one that was simular to the one in the pic, and it had three chambers in it, the first was where the cam cover came in, and that was open at the bottom to the middle chamber and the middle chamber was then open at the top to the third chamber which went back to the intake.

The middle chamber was packed full of this stainless wire stuff??

So the oil had to go down into the middle, then get trapped in the wire stuff, and the the clean(ish) air went up to the third part.

Looked cool, and pretty simple really.

ok so if i join the 2 lines off the cam covers with a T piece into 1 of the inlets and then from the other port on the can to the intake it will work properly!

Can u tell us where u saw the cutaway from cusco can.

Also where on the intake to u join the line back up for the clean air from the catch can?

cheers

Jay95R33 Grand Master

Jay95R33

Posted
Posted

Tell you the truth I can't remember where I saw that cut away picture.

Yeah that's it, if you have a look at the standard set up that should be there ATM, the left cam cover goes to the right, then one hose comes off the right and goes back into the intake.

What you should do is cut that pipe that goes from the right cam cover to the intake and put your catch can in line with it.

So it'll filter the air that's from both cam covers.

Does that make sense?

J

ix9 Grand Master

ix9

Posted
Posted

Can someone explain the flow of these things ? I wanna DIY my own, to get rid of the coating of oil in my intake system...

Could i - In theory, Block the hose that goes to the intake altogether ?

Does the engine NEED some oil in the intake ?

Has anyone else done a DIY jobbie here ?

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