(Click any image below to view in larger format)
After all the research, I decide to use a small air filter as a breather on the can to relieve and crank case or valve cover pressure.
Previous Greddy pipe created too much suction on the catch can, pulling way too much oil from the valve cover. The can filled up during a 30 min race, forcing oil into my intake. During the race I lost 3+qts of oil.
Installing AN fittings to the intake pipe and the oil catch can.