2024 Duramax Dyno
Duramax Dyno
Forum Discussion
It would have been interesting to see what happens to the torque had they used manual mode and left it locked in 7th as it pulled down to 1800 rpm. It’s possible, even likely, that peak torque is achieved by 1800 rpm and the torque curve is flat from 1800 to 2000 or 2100 rpm.
It’s interesting that 420 peak rear wheel HP is obtained at 2800 rpm which is about 89% of the engine’s rated hp. (Indicating an 89% driveline efficiency) At 2150 rpm the truck is putting down 899 lbft of torque. If you use the same drive line efficiency of 89% the crankshaft torque would be 1010 lbft of torque at 2150 rpm. The engine is only rated to put out a peak torque of 975 lbft and that is at 1800 rpm.
It’s interesting that 420 peak rear wheel HP is obtained at 2800 rpm which is about 89% of the engine’s rated hp. (Indicating an 89% driveline efficiency) At 2150 rpm the truck is putting down 899 lbft of torque. If you use the same drive line efficiency of 89% the crankshaft torque would be 1010 lbft of torque at 2150 rpm. The engine is only rated to put out a peak torque of 975 lbft and that is at 1800 rpm.
