Here is a web site to check out the weights and horsepower for various diesel engines.
At what point do the "benefits" diminish... beyond reason?

http://www.adieselengine.com/new_page_1.htm

INteresting info , Cat& Detroit provide specs in the range of our use but as a Cummins owner, it would have been nice if their data didn't start with engines 85hp larger than mine.
Thanks for posting the info.

Regards Bud