Quote:
Originally Posted by Duffman
Wow its been a long time since I posted in this thread. Frank I think your explanation of the U shape is oversimplified at least with respect to the lower RPM. The curve is U shaped in part because the torque curves in general are inverse U shaped. Its been over a decade since I learned the term "mechanical efficiency" wrt to engines but... The maximum torque is like the engines maximum potential, when the engine is operating below that it still carries the frictional losses associated with that RPM but its out put is less so it is mechanically less efficient.
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yes, true, and your consumption does not relate to this as you only open the throttle to get the torue you need, so that chops the top off the U.