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<blockquote data-quote="gckless" data-source="post: 7910502" data-attributes="member: 635756">Well big 3 will help you get all the juice you can from that alt. You listed the specs at 12V? I hope that means &quot;12V charging system&quot; and charges at 14V+, and not charges at 12V. Regardless, if it was me, I would say upgrade the stock battery to the biggest you can fit under the hood. You will want to do that anyway. Then buy a voltage meter. That will be the single most helpful tool for this situation. See where your voltages are at normally. An alternator really should be bought though. Look at the difference in your current potential vs draw. Over 100 amps, that&#039;s quite a bit. I would think an alternator would be almost absolutely necessary if you don&#039;t add atleast another one or two big batteries in the back, in addition to that upgraded under-hood. But again, you can take it slow and watch your voltages and only upgrade what&#039;s necessary if you want.IMO, I would rather have electrical that is way beefier than needed vs. questionable though.</blockquote>

[QUOTE="gckless, post: 7910502, member: 635756"] Well big 3 will help you get all the juice you can from that alt. You listed the specs at 12V? I hope that means "12V charging system" and charges at 14V+, and not charges at 12V. Regardless, if it was me, I would say upgrade the stock battery to the biggest you can fit under the hood. You will want to do that anyway. Then buy a voltage meter. That will be the single most helpful tool for this situation. See where your voltages are at normally. An alternator really should be bought though. Look at the difference in your current potential vs draw. Over 100 amps, that's quite a bit. I would think an alternator would be almost absolutely necessary if you don't add atleast another one or two big batteries in the back, in addition to that upgraded under-hood. But again, you can take it slow and watch your voltages and only upgrade what's necessary if you want. IMO, I would rather have electrical that is way beefier than needed vs. questionable though. [/QUOTE]

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