Vacuum Pump problem.

I run a Morroso evac pump. I have the valve cover baffled as well as one can on a BB. On my one motor (451), pushrod oiled, I pick up very little oil in the catch can (a couple tb spoons). In my other motor (512), shaft fed, I pick up aprox 6 OZ of oil every run. B-1 heads on both. I run a pressure valve at apprx 15-20 lbs. Is there a way to control this better? Is there a better way to baffle these valve covers?

Last edited by DANA60; 04/15/18 01:45 PM. Reason: added info