rpm when towing
When towing with my ram diesel how do I tell when I should downshift. it seems to tow so easy, but slows when going uphill at 60 what should my rpm show.
Forum Discussion
wilber1 wrote:
All these numbers are at WOT so it is just as important to have a gear which allows you to maintain WOT without either over reving or losing speed.
My Cummins 650 has a flat torque curve, it peaks at 1500 RPM and stays flat until 2900 RPM. At 1500 RPM at WOT it can make only 186 HP. At 2900 RPM it can make 350 HP.
Another graphic example of what a turbo DI gas engine can do is the new Audi RS3 engine. It is a performance engine but it also comes with a four year warranty.
2.5L 5 cylinder
HP 400 hp at 5850 RPM 160 hp per litre
Torque 354 lb ft from 1700 to 5850 RPM
That is 141 lb ft of torque per litre at 1700 RPM compared to the Cummins HO's 134 lb ft per litre at 1700 RPM.
Those are impressive numbers. There might be a day in the near future that the most desirable tow vehicles will be powered by gasoline.
