Blowing oil out of breathers

[modstar]

we do have total seal rings. we had tall alum. valve covers with two 1.5 inch breathers on drivers side, but changed to a set of alum. covers with a -8 an fitting with a hose running to a cannister with a breather on top. this settup seamed to be even worse. makes sense with what billetbdcg says, not enough volume.

[25jrjr]

we do have total seal rings. we had tall alum. valve covers with two 1.5 inch breathers on drivers side, but changed to a set of alum. covers with a -8 an fitting with a hose running to a cannister with a breather on top. this settup seamed to be even worse. makes sense with what billetbdcg says, not enough volume.

We had a set of valve covers that always leaked a little out of the breathers. We finally started putting a folded up blue shop towel in each one. We would change the shop towels every 2-3 races and never had another leak issue.

[RW57]

I use old socks on my breathers works perfect the elastic just slips over the breathers everyone has old mismatched socks cheaper than outerwears.

[crowdpleazer]

I would stay away from the crankcase evac as this can pull oil off the top of the valve (bad). more drainback is always better ,especially if you flooding the top w oil. JMO

[Lizardracing]

I vent the intake above the valley.
Drill a hole and weld in a bung or tap for a 1" AN fitting.
Doesn't suck oil off the valves, There's a much slower moving gasses under the intake to reduce aeration, far away from the cam/lifters so no issues there.
You can also pull a vacuum with a pump or the header evacs systems without as much worry of oil coming out with it and it works well on street cars and looks better with closed valve covers. You can add a baffle under the vent bung or even a valley pan if you want too as well. It's also a good place to add oil when needed.