Vacuum pump

I'm not well versed on the subject. Which is part of the reason for the post. But as I understand some run their alcohol tune up too rich and at too low of an engine temperature. This leads to excessive alcohol and moisture in the oil causing the milky oil situation. A lot of people run low tension oil rings. A vacuum pump is said to help with the ring seal of the engine so it helps make more power. Having the crankcase in a vacuum also reduces windage increasing available power. The vacuum also helps remove moisture inside the engine, lowers the boiling point of the water and the alcohol therefore helping with those issues as well.

These are my understandings. If someone more experienced and knowledgeable on this subject could chime it. That would be great.