[from occupied ga]

As the electrical load increases the mechanical load on the engine does not

WRONG! As the electrical load increases it requires more power to turn the alternator. You're describing perpetual motion of the first kind.

[myself6]

Think about how a car operates and how the revolutions of an engine are controlled...

An alternator is spinning at the number of revolutions determined by the RPM of the engine. Pulleys and belts at work here... The only way to increase the revolutions on the alternator is to increase the RPM of the engine.

I don't know what kind of cars YOU guys drive, but the ones I drive GO FASTER when the RPM of the car increases (to a certain point that is).

THEREFORE... The electrical load on the alternator of a CAR will not increase the mechanical load on the engine directly. for the mechanical load of the engine to increase someone or something must make the engine work harder by making it either harder to make a revolution or revolve faster.

As we know, the alternator will not become harder to turn 2000 RPM as the electrical load increases so there will be no increase in the mechanical load of the engine.

[myself6]

You decide you want to drive your car 55MPH down the road. You set the cruise control.

Lets say your engine is running at 2500 RPM.


You plug in one of those DC powered tvs to the lighter jack and turn it on.

The car is still running at 2500 RPM driving down the road at 55mph.

There was NO EFFECT on the mechanical load of the engine, therefore MPG was not effected.

If you increase the electrical load on the alternator beyond what it is rated for (you will probably blow a fuse before this happens) your engine will eventually stop running and your battery will be dead.

I refuse to drive a car that modifies the RPM of the engine according to the electrical needs. F--k THAT!