Big 3 car audio upgrade, engine grounding?

sniperlif3

New member
Well i just have a question when grounding the engine... I have heard that you can either run wire from the negative of the battery to the engine or you can run the engine wire to the chassis which is then ground to the battery...
Why would you want to run the wire from the engine to chassis then to the battery rather than just running straight from the engine to the negative on the battery? It just doesnt seem to be as efficient, am i right?
 
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