What does "all heat exchangers removed" mean?.....Am I recalling correctly you have a couple in the front on each side and you have them disabled (out of circuit)?

the two heat exchangers that i had in place of my fog lights and my Needswings Super cooler are all removed from the car they are in my garage on a shelf..
without any HE's at 80 mph my iat's are 58 to 60 degrees. temp out side is 81.