2021 Ram 3500 H.O.

4x4ord wrote:

I realize that you believe the Powerstroke will defuel more than the Cummins, maybe your right ... but there is certainly reason to think the Powerstroke will always be making more power than the Cummins. According to TFL the Powerstroke made it to the top of the hill on less fuel than the Ram. The extra fuel that the Ram used was lost as heat through its cooling system and/or out the tailpipe. Because the Powerstroke is more efficient it would require less cooling to make an equal amount of power. Unless Ram has very recently increased the capacity of its cooling system I believe the Ford has a significantly greater potential for cooling between its radiators and charge air cooling system. So although it is possible that the Ford will defuel more than the Cummins does on an 80 degree day, I'm not aware of any reason to expect there to be an outside temperature where the Ram would make equal power to the Ford. It really would be interesting to see how warm the outside air temperature could get before the trucks start defueling.

Given your knowledge and assumptions of vehicles thus far, I can see how you wouldn't be aware of a reason. Because to you, things like ambient temperature, air density, barometric pressure, humidity, and so on have no effect on an engines power output, and you believe that an engine should make the same power at 10k ft that it does at sea level.