[jrvariel48]

I took it upon myself to call Cooling Components the makers of my shrouded fan and told them a radiator vendor told me to remove it because it was trapping air. He immediately said are you only having trouble at high speed? Of course, I answered yes!
He told me to cut the top flange down to about an 1/8" and move the shroud directly under the tank. He also told me to trim the bottom of the shroud past the flange and into the taper part of the shroud. He said that being open on the bottom would now act as a vent at higher speeds. I have to try this and see what happens