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Here's a question:

Is there an over abundance of power available that ultimately goes to waste as unused because you're always turning the alt anyways? Therefore you are using some already wasted energy?


Keep in mind that if there is not a great deal of demand on the alternator, then it doesn't take much engine horsepower to turn it. But if there is a large demand (big stereo system, depleted battery, off-road lights, winching, etc.), then the alaternator will offer more resistance to trotation, and thus will require more engine horsepower to turn it.

If the vehicle's battery is fully charged, and no major accessories are running, then it takes very little engine horsepower (and therefore gasoline) to turn the alternator. Not so when it's really working.

1977 CJ-7, fiberglass body, AMC 360 w/ headers, DUI ignition, Edelbrock intake and Holley 4150 carb, TF999, Dana 300, 4.56 gears lockers, York air comp, 4" susp lift, 2" body lift, BFG 35" M-T tires, Megashifter, AGR pump & box, REP8000 winch.