Please forgive a dumb question but, I won't know if I don't ask: How does the pan vacuum make more power? Better ring sealing? Oil staying away from crank journals?
Thanks
Ring seal probably, maybe a little bit from reduced windage. This engine has an 043 top ring with lateral gas ports so pan vacuum probably helps the ring seal and maybe reduces flutter. Can't say I know for sure but more vacuum does make more power.
