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I always understood that at modest speeds drag increased as the square of the speed it is of course the power required that increases as the cube of the speed.
Hi,Next week, i'll be "eco-chipping" my car. I'll have experts rewrite my motor management software to make it more fuel efficient, with a 5-10% increase in range with a full gastank by optimizing valve timings in the 1500 - 2500 rpm range. They will also make my acceleration pedal feel more like the "old mechanical systems" instead of the current "drive by wire", and they will also increase my torque from 350 to 400 Nm, but my BHP/kW will remain the same (since increasing BHP without informing the taxation authorities is illegal here).So my question is: "What performance differences can I expect with this Torque increase while my maximum Power stays the same?"
Thanks for your nice graph, Lmnre, but won't the fuel efficiency depend (non-linearly) on the demanded torque - at any given rpm speed?Surely the efficiency should be a 2D (3D?) plot of efficency versus engine speed (rpm) and torque (or power)?