HO Alternator decrease MPG??? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 14 (permalink) Old 11-20-2008, 09:03 PM Thread Starter
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HO Alternator decrease MPG???

As the tittle says would a HO alternator rub more power out of the engine making it less efficient?

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post #2 of 14 (permalink) Old 11-20-2008, 09:37 PM
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Re: HO Alternator decrease MPG???

I suppose it could, yes. but i would think that it would shut off sooner, to make up for the fact that it charges faster...

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post #3 of 14 (permalink) Old 11-20-2008, 10:50 PM Thread Starter
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Re: HO Alternator decrease MPG???

so it all depends on what electronics you are running? I guess that makes sense

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post #4 of 14 (permalink) Old 11-20-2008, 11:32 PM
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Re: HO Alternator decrease MPG???

Well, an alternator will drain power from the engine based on three things: the output of the alternator, the efficiency of the alternator, and the drain on the electrical system. if you're draining the same, it probably wouldnt change much... even if you're draining a bit more, it probably wouldnt change drastically.
think of it this way- 746 watts is equal to 1 horsepower. an alternator is not perfectly efficient, so it might take like 1.1hp to generate 750W (estimation)
But if it is more efficient, or of similar efficiency, i dont think it would make a difference in overall MPG.

Dan
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84 Honda Sabre V65 1100: pipes, jet kit and new tires. Faster than I think I'll ever need.
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post #5 of 14 (permalink) Old 11-21-2008, 11:43 PM
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Re: HO Alternator decrease MPG???

The only way an HHO generator works is if you have repealed the Second Law of Thermdynamics.

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post #6 of 14 (permalink) Old 11-21-2008, 11:55 PM
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Re: HO Alternator decrease MPG???

Quote:
Originally Posted by Dave Whitmer View Post
The only way an HHO generator works is if you have repealed the Second Law of Thermdynamics.
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post #7 of 14 (permalink) Old 11-22-2008, 06:09 AM
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Re: HO Alternator decrease MPG???

I'm pretty sure he's talking about a High Output alternator...

Dan
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post #8 of 14 (permalink) Old 11-22-2008, 03:11 PM
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Re: HO Alternator decrease MPG???

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Originally Posted by secondarychaos View Post
I'm pretty sure he's talking about a High Output alternator...
I know but I was responding to Dave's comment.

Back on topic:
I am thinking back to my high school days and I plainly remember being able to reduce my fuel economy on the highway by 2mpg if I had the stereo cranked on a long trip. Poor little chevy alternator....
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post #9 of 14 (permalink) Old 11-22-2008, 07:03 PM
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Re: HO Alternator decrease MPG???

he he he that's hilarious.
When i was in High school, i had a tacoma. never tested with the stereo down lol...

Dan
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post #10 of 14 (permalink) Old 11-22-2008, 11:48 PM
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Re: HO Alternator decrease MPG???

When I first did the system in my old trans am it got GREAT mpg when I turned up the stereo, the car quit

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