7a Breather Options

[ian4455]

I'm fitting a 7a cam cover to my 3b project so wondering what breather options people have done ?

[Thuppu]

Where ever you put the breather outlet, don't fit it in the back of the cover. Put is somewhere in the middle, like this:

[UrS4boy]

Umm...That is very ugly and not needed. What do you think is coming out of the cam cover under the "624" on the orange insulation?

[UrS4boy]

I'm fitting a 7a cam cover to my 3b project so wondering what breather options people have done ?

Here is a proposed location for a catch can on an AAN, ABY or ADU (after the pressure control/regulating valve, downstream of where the crankcase and cam cover vent hoses come together):



Here is Steve Y's (now Posto's) 7A cam cover with an external pipe to the turbo to intake hose (which is unnecessary with a catch can):

[Thuppu]

Umm...That is very ugly and not needed. What do you think is coming out of the cam cover under the "624" on the orange insulation?

I was looking at that, but wasn't sure if it came from the valve cover..? Does the 7A cover has a breather in the back of the cover as stock, can't see one in this pic? The back of the cover is the worst place to take the breather out, you practically flood your breather system with oil on high rpm drag launches. Of course if you do a stock everyday driver there is no need for extreme breathing systems and catch tanks, but that does not mean the orginal location of the 20vt head breather is any good.

[ian4455]

My 7a cover is the same, so where is the breather system fitted ?

[terrybullwon]

Umm...That is very ugly and not needed.

the guys at Audi sport seem to disagree

[AndyP]

From memory the 7A cam cover does not have a breather, you'll have to get one welded on. I welded mine on the back of the cover in the same location as the ABY breather but bigger, 16mm I think. I also welded a baffle on the inside to stop it getting flooded with oil under hard acceleration.

[audi rs2 1995]

My setup

[audi rs2 1995]

my car

[ian4455]

my car

Looks good, hopefully i'll end up with a nice clean engine bay.

[audi rs2 1995]

Looks good, hopefully i'll end up with a nice clean engine bay.

Thanks this system works very well on my car , I hope you find a solution

[ian4455]

Wondered about this one with 7a cover ?? http://www.s2forum.com/forum/showthr...t=56026&page=2

[ian4455]

My 3b cam cover only has this as a breather, running nearly 400hp it worked ok. If my goal is to be 650hp on my project then double up the size of the breather to say 12mm dia, or do i really need a breather in the valve cover ?? Any thoughts anyone, realise that the rear of the cover can cause issues with oil into the breather system !