Head Breather Pipe Investigations

[Jonas_R]

Very interesting reading, but know I'm unsure if the system I run with is any good.
I really dont get any oil in the catch tank, even at last mapping session there was a little bit but not much in the tank.

I'm running 370 BHP, 23 psi boost on RS2 setup, comments are welcomed.

[Rusty]

30 laps of a counter clockwise circuit and nothing in the breather tank! Just goes to show that it's the interaction between sump and head that is the issue.

[Thuppu]

I did a separator like this with dual breather inlets from the valvecover. Maybe a catchtank is not needed at all, but anyway I going to put a small tank with breathers to the athmosphere.

[Rusty]

With a swirl pot, a catch tank is just belt and braces IMO. Worth having the second filter though, if it means that you can leave it all connected to the inlet and stop nasty fumes in the car

[A80Avant]

My setup is similar to JP, without the additional tank though. All in one, however here is the problem i am seeing now:

If i only connect the 19mm hose to the tank and leave the 16mm that goes to the rocker cover untouched, then i get the tank barely filling up and the exit of the tank as it goes to the turbo (OEM position), it just gets the gasses consumed.

If i now use a T piece to partially 16mm exit from the PCV system to the tank as well, then i get a lot more oil in the tank, and blow by and as the tank is not the perfect separator, quite a large quantity of oil passes through and goes to the turbo.

So i have temporarily blanked the 16mm hose and put it back to the original position, and the next step would be to make a permanent sink down to the oil pan so that at least the oil gets drained immediatelly and hopefully through there, i would be able to get only gasses going back to the turbo.



currently looks like this, as you can see, one of the tank's inlets is blocked and the outlet goes to the OEM line.

[A80Avant]

by the way, the system that i had above, did NOT work...