View Here : 7.3 Powerstroke Torque Curve
Motor torque, load torque and selection of motors 2/43 2.1 Motor speed–torque curve Refer to Figure 2.1 where T st = starting torque or breakaway torque. T m = minimum, pull-in or pull-up torque. T po = pull-out, breakdown or maximum torque, obtainable over the entire speed range.
The diesel piston is designed with a bowl-shaped combustion chamber. The bowl is usually placed directly below the middle of the injector. The piston on the left is from a 7.3 L Power Stroke where the injector is placed higher in the combustion chamber towards the intake.