2020 Cummins IKE pull
VIDEO What do you think? (other than graphic error at 18:35 that says GMC DENALI :) ) For me, the time is about what I expected as it is missing a 10 speed auto and has slightly less power than ...
Forum Discussion
4x4ord wrote:ShinerBock wrote:
Finally they run the exhaust brake in auto! Like have said multiple times, the Cummins exhaust brake is more powerful in auto downhill than in full if you are letting the truck do the shifting. If you are shifting yourself, then full mode is the way to go.
Time up the hill did a little better than I expected. This truck needs more gears. Did they have tire chains on the tires? They mentioned it in the video, but I could not see them on any tires. I don't recall them mentioning tire chains on the other runs.
So Ford won the uphill time while Ram won the brake applications and fuel economy. I still think they should do the test at 80F. I bet it would be a completely different outcome.
I think the Ram applies the wheel brakes to maintain a more precise speed where as the Ford's computer allows more acceleration before applying the wheel brakes. I'm sure if they had not applied the brakes on the Ford the computer would have. As far as fuel economy goes it was closer than you think. The Ford had to be producing 404 Hp for the 620 seconds it pulled where as the Ram was only producing 352 Hp for the 993 seconds it pulled. If the trucks both performed with the exact same efficiency the Ram should have used 3% less fuel. (The 3% more work the Ford did is do to the exponencially higher drag at 46 mph vs the Ram's speed of 41 mph)
Good points, just as I think that if this test was at 80F instead of 20F then it would have a different outcome. However, these are all assumptions until it is actually proven.
