Rb26 Rocker Cover Mounted Catch Can Install

[NSNPWR]

I know these catch can threads are everywhere but this is slightly different....

I bought one of these or very similar to -

Now from what I can see, there is a tube running through the middle of it from horizantal end to end, with what appears to be a small slit in that tube about half way along?

Can someone explain how these actually separate the oil from the air?

I figure the air/oil blows into the main part of the can (bottom half of it when its mounted) from the 2 rear inlets and the slit in that pipe running through the middle allows the air to escape back into the inlet leaving the oil in the bottom of the can???

Is that it?

Cheers.

[Adriano]

Then the oil drains back down into the motor

[Duncan]

and the seperation happens when oily air hits the side of the container and condenses back out. the more surface area in the can the more oil it extracts. apparently circular ones are better because the air is happy to follow the outside of the container instead of getting stopped by corners

[NSNPWR]

Cheers mate...so the only thing stopping the main section of the can and hence the motor from becoming pressurised is the small slit in that pipe running through the middle???

And in the one pictured, is it really necessary to loop that hose around the back? Couldnt you just blank off those 2 fittings?

Edited March 27, 2010 by NSNPWR

[Duncan]

one of us has missed something important here! could well be me as usual

every motor needs to breathe to releive crank pressure. in factory it breathes back into the intake. many people change to external breathers

that pic you have seems to show the factory breather back to the intake connected from the right side of catch can

[NSNPWR]

Yeah, these are a sealed type unit that does return back to the inlet but its supposedly clean air, having been through the separator...

You really need to see inside it....coz im still a tad confused as to exactly how it works even with it here...I sent the workshop I bought it off a message but got no response...

[Adriano]

But remember that the hose going to the inlet manifold is blocked under boost and decel by the pcv

[STATUS]

that getup adds a baffled "catch can" into the std PCV and breather system.

In the pic you posted the driver side outlet goes to the PCV and at cruise and idle has vacuum, under boost the pressure is directed out the passenger side oulet into the rear turbo intake pipe.

The above catch can would only be a good idea if it was properley baffled internally other wise it is barely better than the std cross over tube. The lack of welds leads me to believe it isnt baffled but they may have been ground and polished out.

[Deano 1]

ive got the same catchy on my gtr, i blocked the too pipes off, so i dont have that cross over pipe at the rear. Just the catch can and everything eles in pic, this that a prob that i blocked em off???

And trent are u basicly saying they no good for a street/trackday car??

[NSNPWR]

that getup adds a baffled "catch can" into the std PCV and breather system.

In the pic you posted the driver side outlet goes to the PCV and at cruise and idle has vacuum, under boost the pressure is directed out the passenger side oulet into the rear turbo intake pipe.

The above catch can would only be a good idea if it was properley baffled internally other wise it is barely better than the std cross over tube. The lack of welds leads me to believe it isnt baffled but they may have been ground and polished out.

Cheers for the input mate...the one I have, the drivers side outlet (running to the PCV) and passenger side outlet (to turbo intake) are connected via a pipe running through the guts of the can (pipe is same diameter as the outlets)...what im confused about is how the rear breathers actually vent? Theyre blowing into the main section of the can (as in the photo/example above) but how then are these gases dealt with as it would seem the pipe joining PCV - Turbo Inlet is almost sealed, beside what appears to be a slit about half way along....is this where the the gases from the rear breathers are sucked back into the inlet? Through this thin slit???