With respect to going up hill and lifting off the throttle to a point where it does not impact speed is the lively discussion at the moment.
We the eco drivers will not mat the throttle to accelerate up a hill. There is an instaneous torque/ horsepower limit at any engine speed where acceleration is not possible. Opening up the throttle beyond that point is only pouring fuel through the engine without benefit as the ECU will likely go into open loop mode on the A/F management and run rich.
Take a look at the next guy that is passing you on the hill and watch him lean ahead in his seat as he tries to "will" the car faster.... he already has it matted. might actually see black smoke....
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