Well, I don't completely agree. It depends on where and what your measuring. (distance/speed to complete the task) My torque has hardly changed and with the headers actually dropped with my modifications but guess what, I'm going down the 1/4 mile faster. Torque is the amount of work that the engine can do. HP is the speed in which it can be accomplished, at least that's how I understand it. So as long as you have enough torque to overcome the force of wind, weight, friction, etc. then the additional horsepower is going to make you quicker finishing the work. I think 300 ft.lbs. of torque at 6500 is plenty for our cars until reaching 170 or so. Am I wrong or understanding the same thing in a different manner? Diminishing returns I agree with but a lot depends on how diminished and where the goal is set.

Les