Ford 7.3L gas power numbers

Groover wrote:

RoyJ wrote:

dodge guy wrote:
Yes, better gearing will tow better. Glad you now understand!

And with enough gearing (10 spds), two engines of the same hp, one with double the torque, will perform IDENTICAL except right off the line.

I hope you understand that now.

I agree with you in principle but in every dyno test I have seen the diesels produce much more of their rated horsepower than the gas engines in the same vehicle. So, a diesel will frequently outrun a gas engine of the same rating. I haven't found any explanation for this and it is just a personal observation. It may have something to do with diesels being considered commercial engines being tested to a different standard.

Oh I agree, in reality any forced induction engine will likely be under-rated. A 430 hp diesel will dyno a lot healthier than a 430 hp gas. I was strictly explaining the theory behind it.

We should compare a diesel and gas that dynos the same peak hp. The diesel with an older 6 speed, and the gas with 10 spd. I bet at sea level they'd pull very close.