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Old 06-13-2009, 02:30 PM   #3 (permalink)
Daox's Avatar
Join Date: Dec 2007
Location: Germantown, WI
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CM400E - '81 Honda CM400E
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Quite true aerohead. I haven't dug through the service manual.

More testing shows:
ign off - .1A
ign to Acc - .22A
ign on (engine off) - 2.15A

The last number was really the one I was after. If I go alternatorless, about half of my trip is with the engine off. So, if the car uses (the average guess of) 25A, I'll really only be using ~13A since my engine is off half the time. This should easily allow me to use a group 24 marine battery that I already have laying around without discharging it too much on my daily commute.

I did also go for a short spin around the block testing headlights and fan since that is really the only things I use in the car besides the stereo which pulls very little power. Unfortunately, the 200A gauge is not nearly accurate enough to get any specific numbers.
Current project: A better alternator delete
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