Fan shroud / motor heating on highway

Finally installed a derale dual fan 16830 that have 22.5 large by 19’’ high . Direct fit there



Now have 2 x 11’’ fan 265 motor that pull 3750 cfm !

I think that whit out mécanical fan whit the original shroud , the wind didn’t go correctly trough the radiator whit the van configuration. Whit good fan , when temps go more than 195 , fan start and don’t go over. When both fan start , there’s a lot wind