Quote:
Originally Posted by Capt Spaulding
The other reason it's slow is 7500 is way past the power/torque peak. My experience in my car is that the power begins to drop off as you approach 7000. After 7000 both of the stock engine's curves drop like a flume ride at six flags. You can push it farther, but that will slow you down. You're better off (in my opinion) shifting at about 6800-7000. That drops you down in to the mid 5000 range which is very close to the place where the engine's torque and horsepower curves intersect which is generally (again, in my opinion) where you want to be after an upshift.
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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.