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
noteven's avatar
noteven
Explorer III
Oct 28, 2020
Some dummy spec’d my old Dodge 6 speed IShift so it’s towing cruise rpm is 1/2 way between peak torque and peak power in overdrive. When you start up a grade a downshift to ... direct (who knew?) has the engine closer to peak power ...

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