Forum Discussion

ShinerBock's avatar
ShinerBock
Explorer
Oct 20, 2020

Why diesels are most efficient around 1,800 rpm

Finally got more of an answer to why all diesels are most efficient around 1,800 rpm. In comparison to what I thought, it has more to do with how diesel burns than other things like compression ratio...
Tow Vehicles
ShinerBock's avatar
ShinerBock
Explorer
Oct 20, 2020
On the right is the BSFC of the new 2019 standard output Cummins with a higher compression ratio. Its sweet spot is much larger than the 2018 and it would be even more advantageous to tow in 5th at more speeds and loads than 6th if you had a 3.42 axle.

About Travel Trailer Group

44,030 PostsLatest Activity: Feb 06, 2025