Quote:
Originally Posted by kidgrem
I can get as good or better fuel mileage running up to 90 mph when running late for work as trying to drive 70-75 mph. I don`t believe the trans by itself controls fuel mileage there has to be more variables. It gets good fuel doing 80 or 60 if 2000 rps are not exceeded. 2000 rpm just cant be maintained constant for extended lengths of time at any safe highway speed. If running the car up to 80 then letting it slow to 70 and repeating gets decent fuel there has to be a happy medium. I want to fool the car to think its doing 2000 rpm not lock it in to 2000 rpm. perhaps a variable resistor device or program.
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It's not the transmission that controls fuel economy. You have to look at net energy in vs out, and it takes 66% more energy to push air out of the way at 90mph than at 70. Where does that energy come from?