Carl if you read Sams post, you DO get max evacuation at mid to full throttle. It all works exactly the same as the 250 and beyond engines.
My theory is, the reason for all the blowby proneness is slits in the valve cover opening your engine to all sorts of road sand and crud being sucked in, no crankcase gas evacuation thus soot and gas-crud mixing with your oil, causing the upper end to get plugged up prematurely, and top it off with a filter system that filters less than 18% of the oil! All preventable every bit as well as engines much newer.
I realize the road draft tubes design is such that it pulls air out of the crankcase using the venturi principle (still positive), not push air in, but it's very inefficient by today's standards. Its MUCH dirtier but if you are stock aficionado, it works! No need to fix what you perceive isn't broke. The KANG has left the building! Thank You, Thank You Very Much!
