Quote:
Originally Posted by gtofreek
For under hood battery applications, 4 gauge is plenty of cable for the starter. 2 gauge is the most you should ever need. If the battery is in the trunk, then I would step it up to 1 gauge. Any cable large enough to operate the starter, will be double the cable you need for charging the battery.
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I agree, and my experience says the same thing (I do high current charging systems for a living but that's just an aside). My only reason for using 2ga on my cars is that most of the generic parts store 4ga wires, while passable, aren't exactly that stellar for the long haul. I've never had a problem with 2ga and I've got some on a car that are 10+ years old and work perfectly still, even in +100F heat.