Ram HD 1000 lb-ft MPG loop

RoyJ wrote:


So, let's see, even when there's clear evidence, from your own article, that supports a theory different than yours, you'll still find every excuse in the world to deny it?

Re-read what McKenna said, drivetrain component wasn't the factor in THIS case, you made that up. He clearly said it was driven by elevated duty cycle of doing heavy haul in mountains.

At this point nothing would convince you. Again, start a new thread, I'm done here.

Actually the article I posted stated exactly have been saying the about how horsepower levels vary depending on the application the engine will be used and and they are not decreased for longevity reasons. The right displacement of the hp level depends on the the duty cycle of the application which I am shocked that you,being the expert on medium/heavy duty engines and all, didn't know that larger diesel engines have more torque and achieve peak power/torque level at lower rpms. Actually... no I am not surpised especially since you thought all of these engine operated under the same constant load.

Uhm, I never said the said anything about drivetrain so I am sure where that is coming from. Being that he is the director of powertrain and the article was talking about engine ONLY, most of what he was talking about and what I quoted from him was about engine and how he stated that technology and materials used in today's engine allow us to have greater power densities without sacrificing engine longevity. However, other link have stated it if you would have taken the time read them which is obvious that you did not since we are still having this conversation.

"However, with diesel engines for Class 6 and 7 trucks, there may be 10 or more horsepower and torque ratings to consider, making engine selection significantly more complex. The approximate cost difference between the lowest and highest horsepower ratings, when factoring in a heavier transmission required for the higher horsepower engines, can run an additional $8,500-$10,000, or more.

Spec'ing Medium-Duty Powertrains for Optimum Performance



"The approximate cost difference between the lowest and highest hp ratings, factoring in a heavier transmission required for the 300 hp engine, is as much as $8,500. This variance in engine hp/torque availability and cost is common across all Class 6 and 7 truck OEMs"

https://www.government-fleet.com/146164/all-about-medium-duty-work-truck-engines