2020 Freightliner vs 3500 GMC Dually at the Ike
Interesting outcome... Trailer: 18,500 lbs GMC Engine: 6.6 Duramax Brake Applications: 1 Time: 10:28 Freightliner Engine: 9.0 Cummins Brake Applications: 0 Time: 10:42 Link
Forum Discussion
FishOnOne wrote:
The hood mounted air scoop was supposed to help with sustained power.
It probably does for most short inclines, but not under longer sustained loads. If you look in each diesels programming with tools such as EFILive and SCT, you will notice all three have defueling and/or pull timing programmed into their mapping. Various things can trigger this defueling or retarding of timing such as high temps or emissions related problems. It is similar to the ECM putting the truck in limp mode my regulating fuel delivery to keep you at a certain speed/rpm even if your foot is to the floor.
