Vikki - That post was very informative. I get it now. I told my mechanic I need to experiment with the cooling of a mech fan & shroud. He said higher CFM electric fans are already being picked up and it may not cost me anything... So I guess I'll experiment with those first. If insufficient, back to a real fan I go

Also going from 155 tstat to 190.
Also switching from gasoline to unused, enriched plutonium.