Quote:
Originally Posted by ZDan
No, where the curves cross means nothing as far as optimal shift points. Crossover rpm is exactly the same for any engine, and only depends on what units you are using. English units, torque in lb-ft and power in hp are "equal" numerically at 5252 rpm. But this is meaningless as the units are different. In metric (N-m, kW), crossover is at a different fixed rpm (apparently 9543rpm), again for any engine or motor.
Optimal shift point for max acceleration would be to shift far enough *beyond* peak power rpm (which is 7000rpm for stock FT86) that you end up at the same power level at the reduced rpm in the next gear up. For us, we can't rev high enough so optimal shift point is at 7400rpm redline.
|
Thanks for straightening me out on the intersection question. My former rule of thumb gleaned a long time back was to shift at the power peak and set the gearing up so you land on or near the torque peak.
I'm still a little leery of the argument in the second paragraph, I understand maximizing the area under the curve but my experience on track suggests otherwise. Do you have empirical support for that assertion.