Not like that. It’s like AJ said. With a breather open to manifold vacuum when it drops at WOT any blow by will go right into the engine. The OE’s didn’t do that.
They have a breather that’s open to atmosphere so at WOT the blow by can go somewhere other than the engine.
IMO, the guy who made the video should have just blocked off the open breather all together and just let the PCV pull a vacuum in the crank case.
Beg to differ. Just an example Look in the mopar factory service manual (1972) section 25, pg 15 and 16, figure 4, under crankcase emissions. Hose goes to air cleaner. Only the very early PCV systems had a breather open to air.
The 1967 service manual shows the "Open to air " breather system for "federal" spec cars. But shows the "Closed" (hose to air cleaner) system for Calf spec cars. So I was off about 4 years on how long the OEM has been using the closed system. My memory is not what it used to be. (old age don't you know).
