He was talking about that exact run, not a stretch you deem "comparable," as that IG is the only stretch they tested.
Your comment is baseless. Apparently you completely missed the point of this discussion. The Ike Guantlet is one road in America that the video testers used because it is both high altitude and a lengthly grade. It is in Colorado. There are roads with similar grades in the west that are just as long and just as steep. I would not think that the truck's performance would be statistically different since a six or seven percent grade that is as long as the Ike or longer should be about the same as it relates to the truck's ability to tow heavy as long as it is about the same elevation reagardless if it is in Colorado or California or whereever. The truck's engine does not know where it is, it just knows if it is working hard or not.
A turbocharged engine will work better at altitude every time over a normally aspired engine. Most normally aspired engines lose about two percent of their sea level power for each 1000 feet elevation. At 10,000 feet elevation that equates to around a loss of twenty percent of the engines power. A turbocharged engine like the Cummins can maintain almost sea level rated power to 10,000 feet or even more. That equates to a delta of 429 foot pounds of torque for the 6.4 at sea level and 865 foot pounds for the Cummins and the Cummins can hold that power setting all the way to top of the mountain pass, any mountain pass not just the Ike Gauntlet. The 6.4 cannot maintain 429 foot pounds to 10,000 feet. There is a difference.
