Freightliner Argosy speed governed

I would think so. I certainly would not want any engine governed at 1400, especially pulling that weight, even if the terrain is flat, just for longevity of the engine.

So you must run it against the governor before shifting and then wind up at 1100-1150 after a shift?

 

Agree with @Oxbow

Your running that engine close to peak torque all the time. So you're working the engine harder, using more fuel, and causing unnecessary wear

 

Why not run it a gear or 2 lower at 80 km/h first and see how it performs?

I'm assuming the reason the RPM is low is because of the ground speed restriction and running in top gear. I've never heard of any engine being limited to 1400 RPM. Most big diesels are governed to 2100-ish.

 

He asked if running 90 kph at higher rpm would be better, so I assumed he wasn't restricted to 80.

 

Two questions is the other truck better on fuel ? And is 80 km/hr the country’s governed speed for your combination. The 14 litre engine was never good on fuel without tweaks pulling 100 k for me at 120k I suspect 3.9 us mpg is normal for it.