Ford 6.7L 1050 ft lbs TQ at 1,600 rpm, 475 HP at 2,800 rpm

ShinerBock is likely right on the money regarding these trucks not being able to make peak HP for a sustained pull up the Ike due to high exhaust gas temperatures. At 10,000 feet the turbos may be limiting the amount of air and the after coolers are going to be less effective both of which will lead to hotter exhaust. None of the trucks.... including the Frieghtliner pulled the way they should have had they been making their claimed power. If the engines are holding back fuel on account of hot exhaust the outside air temperature at the time of the test could impact the way one truck measures up against another if the trucks are not run up the hill at the same time. Even if the 2020 Powerstroke can sustain 475 HP for a long pull at some elevation there will certainly be an elevation where its power is going to start dropping off.