2014 Ram 2500 6.4L Tow Review
Today I took my new Ram for its longest tow to date, a 350 mile trek through Ky and and the Smokey Mountains ending the day in NC. This was a good test with light to heavy rain all day, low visabilty ...
Forum Discussion
childofthewind wrote:Buck50HD wrote:
Actually, I had to verify my assumption so I ran the numbers on the 6.4 with 4.10's.
3rd gear = 3700RPM @ ~295HP (6.2 with 3.73 can make 260 in 3rd; 6.2 with 4.30's would be able to make 310HP)
2nd gear = 4830RPM @ ~385HP
So, the 6.4 with 4.10's would be in 2nd gear at 4800RPM to get 20,000 lb up a 6% grade at 60MPH.
Interesting, how are you calculating the HP? I haven't seen any power/torque curves for the 6.4L Hemi. I would love to get data / calculator for that.
It's possible to estimate curves from the advertised HP and TQ and RPM #'s. I also was unable to find a real chart. Can't even find a dyno run, although those inertia based dynos used at most places are not very accurate, particularly for big trucks with a lot of driveline inertia. For towing, the steady-state numbers are far more meaningful since the accel rates are low.
