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Old 04-26-2015, 12:42 PM   #28 (permalink)
California98Civic
Cyborg ECU
 
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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Quote:
Originally Posted by oldtamiyaphile View Post
So your car sits at 12.8v as long as speed is below 40mph? ...
Yes. Unless the voltage or load crosses other limits/thresholds. And climbing hills at low speeds the voltage will sit even lower. It also will maintain a low charge in some conditions. For example, just before climbing a slow hill from a stop, my voltage meter shows say 12.34. I key on, begin the climb, flip the alternator switch on, and the charge climbs and stays only at 12.5 volts during the whole climb.

We're probably a little off topic for the OP though...

I think one message of the thread is probably that removing the belt is an option but not necessary, though it would be simple. You could do an alt on/off switch instead and have less range anxiety. Whether you remove the belt or install a switch, get a deep cycle battery and a plug-in, on-board charger with a capacity 50% or more of the amp hour rating of the battery.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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