Ok I have fabricated a shroud for my radiator with a spal puller fan.I am very limited with space so originally I had the fan mounted on the radiator.The shroud is barely 3/4" of an inch with the fan now mounted to that.When I went down to Reno for Hot August nights(about 35 miles)the temp went up to about 205 when I was driving on the freeway.When I get into slow moving traffic it drops to 195 or less.I am thinking that when I am doing a faster speed the air flow now gets backed up against the shroud with no where to go.What do you guys think,the only other thing I can think of is it is leaning out a little.Any ideas