mine only revs to 4000
I couldn't imagine lugging mine down so hard as to never see over 2000rpm, my clutch would hate me more than it already does!
WELL, UMMmmmmm - 2000 RPM in 6th gear puts me over 70 MPH in a state where the speed limit is 55 MPH - do ya suggest that maybe I drop down to 4th gear and then run it at redline instead?
The sad fact implied in that above quote, is the gradual acceptance of higher RPM in diesel engines as normal, beneficial and a necessity, and the forgetting of the FACT that the traditional basic advantages of a diesel were in it's power, torque and economy at LOW RPM. In fact, earlier threads and posts in this very board frequently were critical of the higher RPM competing diesels were forced to use to generate power in the class of the smaller displacement, LOW RPM Cummins...
MY, how times have changed!
In the hills, towing our 5th wheel, I can COMFORTABLY cruise at under 2000 RPM at 55 MPH in 5th gear - NO "lugging" of the engine involved - acceleration is immediate at the touch of the go-pedal - do ya suggest that instead, I drop down still another gear or 2 to get the RPM's up to 3 grand or so?
For what purpose, and to impress WHO?
One of my primary reasons for buying the '02 Dodge/Cummins combo was EXACTLY due to the fact that 2000 RPM is right at it's "sweet spot" for power, economy and torque - IF I wanted or preferred high RPM operation, I'd have bought a gasser, or a Ford or GM V8 diesel - or waited for one of the "latest and greatest"

new high RPM EPA regulated diesels all buyers of future trucks will be forced to drive because nothing else is available.
But no, I prefer to continue with a traditional diesel. one with a heavy block, long stroke, and power in the 1800-2000 RPM range that EASILY handles all loads that *I* have yet to place upon it...

:-laf