HP required to pull hills
Here is a formula that will give a rough idea of the flywheel HP required to tow a fifth wheel up a grade at speed. HP= s(53000+gw)/31800 s = speed (mph) g= % grade w= weight of truck and trai...
Forum Discussion
4x4ord wrote:Cummins12V98 wrote:
I will be pulling my 35k combined double tow thru 6% grades next week. What should my low speed be?
44 mph if you hit a long steady 6%. Sometimes there are short sections with a 6% grade where the sign is but the overall grade is considerably less. To really know the grade of the hill you'd have to know the elevation at two points on the hill and measure the distance between them. Here is a link to an elevation tool.
Edit: I was thinking you had 3.42 gears so 44 mph was figuring you'd be approaching the redline in 2nd gear. You've actually got 4.10's. The 4.10 gears will keep you in 3rd at a nicer rpm but you'll only be at about 40 mph.... maybe a touch over.
Thanks, I will report back. The extra 2K and extra axle does slow it a bit compared to the 33k towing just the 5er.
