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<blockquote data-quote="audioholic" data-source="post: 5313975" data-attributes="member: 549629">You will find that the construction of the vehicle itself will be a much more dominant factor. Richard Clark and David Navone did an experiment a few years ago to measure the resistance of several (then) modern vehicles. It was found that most displayed extremely low resistance when using the chassis ground, but a few models displayed a much higher resistance. It was determined to be caused due to the uni-body construction plus a few design choices that did not lend themselves to quality current transfer.Basically, if you have a full framed car, dont even consider running a dedicated ground cable. If you have a uni-body car, it may or may not be advisable, and if you are concerned then test your chassis resistance versus your power cable resistance (to give a comparison) using your DMM.The less conductive nature of steel versus copper plays almost role in this comparison, due to the sheer amount of steel in question.</blockquote>

[QUOTE="audioholic, post: 5313975, member: 549629"] You will find that the construction of the vehicle itself will be a much more dominant factor. Richard Clark and David Navone did an experiment a few years ago to measure the resistance of several (then) modern vehicles. It was found that most displayed extremely low resistance when using the chassis ground, but a few models displayed a much higher resistance. It was determined to be caused due to the uni-body construction plus a few design choices that did not lend themselves to quality current transfer. Basically, if you have a full framed car, dont even consider running a dedicated ground cable. If you have a uni-body car, it may or may not be advisable, and if you are concerned then test your chassis resistance versus your power cable resistance (to give a comparison) using your DMM. The less conductive nature of steel versus copper plays almost role in this comparison, due to the sheer amount of steel in question. [/QUOTE]

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