I’ve got a prototype PCV setup on my 235. Unvented oil fill cap that has the PCV and grommet. Getting its vacuum from manifold wiper port. FILTERED makeup air via a motorcycle breather clamped on the bottom of road draft tube.

I still need to find some time to test how much vac the crankcase is under. (Was going to test at the dipstick tube). But early results are good. No stinky vapors up front. No excessive smoke out back.


1951 3100