Quote:
Originally Posted by aerohead
Torque and rpm is power.
You're not accounting for the actual net amount of power derived from the fuel charge. Sure the rpm can remain steady, but that says nothing about how efficiently, or not, the engine is converting the chemo-thermo energy into mechanical energy.
A course in internal combustion and air pollution was required in my course work. We had an engine test cell with a General Electric engine dynamometer at Texas Tech. BSFC is probably the most important thing to know about an engine.
I've already told you that I did coastdown testing to SAE protocols, and top speed at the Chrysler Proving Grounds. Top speed testing at Bonneville. And General Motors Aerodynamics Laboratory helped with the data reduction.
No theorizing necessary.
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Ok, you definitely haven't read how throttle stop testing works.
The engine is at a constant throttle. RPM varies inconsequentially The air/fuel ratio is constant. Ignition timing varies inconsequentially.
But look, don't worry about it. The technique works brilliantly - if you can't get your head around it, that's OK.