Originally Posted by Frank
Oh god, this is going to be a travesty. It's just waiting to happen. I can't watch.
Here's a hint:
HP is a simple multiplication formula. Usable power takes a little more math skill. You Calc graduates know what I'm talking about.
bingo. usable power = area under curve IN USABLE REV RANGE (ie, where you spend most of your time. this is a mathematical concept called "integration" (calculus)
whether you are talking about the torque or hp curves does not matter, as they are linked and proportional anyway (in otherwords, increasing the area under the torque curve increases the area under the hp curve by the same amount).