Now you are making sense. In that last quoted sentence, Obert forgets to mention his whole point: air consumption and hp OVER A PERIOD OF TIME are directly proportional. That has been my whole point as well. That doesn't change the fact that the most air an engine draws in is at peak torque. With no time frame peak torque IS peak power. Any torque peak limited to below 5252 rpm results in the peak torque and peak hp being at exactly the same rpm regardless. A lot of engines don't rev over 5000 rpm. More air is more air. More air over time is more air over time. I thought it was clear that I was talking about more air. Now you are talking about more air AND more air over time. That's fine as long as you understand the difference. I am hoping this conversation helps or sparks an interest in understanding.