Convert crankcase breather tube to PVC system

[flatjack9]

Originally Posted by AnthonyG

I want to use the vacuum port on my center carb and connect to draft tube. do I even need a PVC valve? ( 94nwith vac. port for timing is plugged as using an electronic dist. ). with constant vacuum wouldn't it just stay open? Or do I need the extra vacuum resistance to prevent too much vacuum loss so the engine runs smooth?

The PCV valve has a spring and pintle system combined with an orifice that regulates the flow depending on the vacuum applied.