Reluctantly joining the catch can club

[W i l l]

I've got catch cans on one of my cars, but a racer told me I should go back to PCV to get the vacuum on the inside of the motor and avoid the pressure buildup that will cause gaskets to leak, etc. I told him I didn't want to be burning oil back through the intake but he said in a street-driven car the horsepower loss is very minimal.

My catch cans were installed by Lingenfelter and have the brillo pads vents. Are the catch cans you guys are using sealed? Probably not if they have a dipstick. But why not get a baffled and sealed catch can and put the catch can downstream of the PCV valves and get the best of both worlds?

[1991 Corvette ZR-1]

Originally Posted by W i l l

I've got catch cans on one of my cars, but a racer told me I should go back to PCV to get the vacuum on the inside of the motor and avoid the pressure buildup that will cause gaskets to leak, etc. I told him I didn't want to be burning oil back through the intake but he said in a street-driven car the horsepower loss is very minimal.

My catch cans were installed by Lingenfelter and have the brillo pads vents. Are the catch cans you guys are using sealed? Probably not if they have a dipstick. But why not get a baffled and sealed catch can and put the catch can downstream of the PCV valves and get the best of both worlds?

The ADD W1 is sealed. The little knob for the dipstick is threaded to screw into its hole and it also incorporates an O ring to help seal it when fully threaded in. It is a nice little feature.