Engine torque
After the engine in our '09 V10 6.8L F250 'sploded 3 days ago, we ended up with a new-to-us replacement '12 GMC 2500HD that we were able to find on very short notice. The V10 6.8L was rated 362HP w...
Forum Discussion
4x4ord wrote:RoyJ wrote:
Here's another way I explain to people: if you closed your eyes, and I put a 2:1 gear reducer behind the V10, and moved the tach sensor there, guess what you'll end up with?
362 hp @ 2,375 rpm (instead of 4,750), and 914 lb-ft @ 1,625 rpm. Assuming no gear losses.
So, would this V10 suddenly become a "diesel torque monster", and pull the same trailer up a hill faster? Of course not!
Actually it would tow the trailer up many hills faster. It would end up having more gears to choose from to keep the engine at the desired engine rpm. It would pull like a 362 HP diesel. For instance the hill that the stock V 10 struggles to tow in 3rd gear at 55 mph the modified truck would likely climb at over 60 mph in 5th gear running close to peak HP
But why not choose a lower gear to begin with? Pull the hill in 1st instead of 3rd, and then run 3rd at 60 mph instead of 5th.
My point is with a modern transmission such as the 10 spd, where ratios are essentially unlimited, a 300 hp gas should perform very similar to a 300 hp diesel at sea level.
