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2nd Battery
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<blockquote data-quote="Doxquzme" data-source="post: 8849446" data-attributes="member: 689267"><p>Nothing changes but... the big three upgrade adds 1/0 girth to the existing power wires and 2/0 girth to the grounds. Grounds are all part of the same path, increasing all the electrical (battery and ground) cable under the hood covers all you need. There’s really no difference grounding to the chassis locally back where the amps and caps are or back to the batteries to the chassis, it's all the same ground. Just because it passes the battery on the way doesn't change the properties of how it works. I know this throws people off sometimes but grounding to the chassis has always been done to reduce resistance as it is the shortest path to ground. Using 2/0 or 4/0 wire back to the front battery does the same thing. Unfortunately, today’s cars are not one big ground anymore; they are made of sections which are glued together which changes the characteristics of the grounding area/material. Sheet metal is a lot thinner too and outer body panels that all use to be metal share the skin with urethane panels too. Most of the time it’s not an issue, but I like it done this way, it’s clean, and it’s affective and I never have to troubleshoot ground loops.</p></blockquote><p></p>
[QUOTE="Doxquzme, post: 8849446, member: 689267"] Nothing changes but... the big three upgrade adds 1/0 girth to the existing power wires and 2/0 girth to the grounds. Grounds are all part of the same path, increasing all the electrical (battery and ground) cable under the hood covers all you need. There’s really no difference grounding to the chassis locally back where the amps and caps are or back to the batteries to the chassis, it's all the same ground. Just because it passes the battery on the way doesn't change the properties of how it works. I know this throws people off sometimes but grounding to the chassis has always been done to reduce resistance as it is the shortest path to ground. Using 2/0 or 4/0 wire back to the front battery does the same thing. Unfortunately, today’s cars are not one big ground anymore; they are made of sections which are glued together which changes the characteristics of the grounding area/material. Sheet metal is a lot thinner too and outer body panels that all use to be metal share the skin with urethane panels too. Most of the time it’s not an issue, but I like it done this way, it’s clean, and it’s affective and I never have to troubleshoot ground loops. [/QUOTE]
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