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
I did an experiment with my Ford and determined that the Ford exhaust brake will produce about 170 reverse HP at the rear wheels (at 3500 engine rpm) ... likely about 145 at the crankshaft. Without the exhaust brake turned on the engine will produce about 62 negative HP. Drag and rolling resistance at 50 mph on a typical truck and 5ver is likely equivalent to about 80 negative HP. So the total resistance on my truck and trailer with the exhaust brake working at maximum capacity is about 250 negative HP at 50 mph. My 24000 lb truck/trailer on a 7% grade needs about 225 negative HP to hold it from accelerating.
Based on what I have experienced towing in the mountains the above seems about right. It takes an 8% grade before I will see may wheel brakes applied to supplement the exhaust brake.
Edit: Cummins: you need 382 reverse HP at the rear wheels of your truck to keep your 33k lb combined unit from accelerating on a 14% grade at 35 mph.
Based on what I have experienced towing in the mountains the above seems about right. It takes an 8% grade before I will see may wheel brakes applied to supplement the exhaust brake.
Edit: Cummins: you need 382 reverse HP at the rear wheels of your truck to keep your 33k lb combined unit from accelerating on a 14% grade at 35 mph.
