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Race cars, especially those using high power mega-kabillion Jules ignitions like MSD's 7AL are often needing more battery than a 12volt -- or even a couple of 12volts. I run one of these 16 Volt AGMs in my Big Red Ram
NMCA's Fastest Street Car (and none of them really are) Magazine had a pretty good article on 16 Volt AGM batteries. I don't think they'll mind that I scanned it to share hear.
OK -- this conversation brought a conversation about how to deal with the 12V components -- now that these 12V batteries no longer have a separate 12V lug/post to them.
While there appears to be a debates that you need to do nothing -- I've heard enough stories of wearing out water pumps, fuel pumps, gauges, fan fires, etc running 16v -- or at least the 20V surge when initially powering the component.
So -- what would really help out is is someone could add to this thread a white paper and hopefully a scanned diagram on which, how and where to wire in 16V to 12V step downs.
I don't know enough about electricity to write a paper but why wouldn't a voltage regulator work? Or run two separate systems.....I would think the ignition system would perform well and would have all the voltage it needs without worry from anything else drawing from it.