2021 Cummins 1075 lbft peak torque at 1356 rpm
Apparently the 2021 Cummins makes its peak torque of 1075 lbft at 1356 rpm. Are you still impressed?
Forum Discussion
Or, assuming your calculated rpm at certain speeds and certain gears, regardless of vehicle, the closer the gear splits (more available gear ratios within a certain speed range), the less of a rpm jump or drop and the greater the ability to match desired speed, and rpms (up/tq) balance.
I’d argue if your numbers are right, dropping or gaining 500-600 rpms with a single gear shift is not ideal and more available ratios will only serve to improve performance by staying ever closer to the perfect sweet spot at more given road speeds.
Does the 10 speed Ford really have 500 rpm drops between gears especially in the upper gears? If so, I’d say it doesn’t have ideal ratios for towing and maybe wasted a gear or 2 too many on upper high speed “cruising” gears.
The 6 speed is good but not ideal, talking Cummins or any other diesel pickup. The more the merrier.
There’s a reason heavy haulers have 18 speeds, besides the big engines havin a much smaller useable rpm range, it’s also to keep the truck putting out the most available power to the ground over the greatest speed range.
Or simply put, more gears the better, within reason.
I’d argue if your numbers are right, dropping or gaining 500-600 rpms with a single gear shift is not ideal and more available ratios will only serve to improve performance by staying ever closer to the perfect sweet spot at more given road speeds.
Does the 10 speed Ford really have 500 rpm drops between gears especially in the upper gears? If so, I’d say it doesn’t have ideal ratios for towing and maybe wasted a gear or 2 too many on upper high speed “cruising” gears.
The 6 speed is good but not ideal, talking Cummins or any other diesel pickup. The more the merrier.
There’s a reason heavy haulers have 18 speeds, besides the big engines havin a much smaller useable rpm range, it’s also to keep the truck putting out the most available power to the ground over the greatest speed range.
Or simply put, more gears the better, within reason.
