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I did an alternator upgrade recently, and I have 3 feet of 1/0awg wire left over. Would it make any difference if I were to use this remaining wire to replace my starter's current 6awg wire?
I have a 4.0L jeep wrangler and I have to crank it for a couple seconds to get it to start. Would adding a wire with lower resistance help anything? I don't see how I could hurt anything by adding 1/0awg wire, but would it help at all?
It certainly shouldn't hurt anything, but it is unlikely to help either as the wires to your starter should be appropriate anyway.
If your wiring is old then you may see an improvement, otherwise I would suggest leaving it alone.
It won't hurt anything providing that you have a solidly crimped connector on both ends. As a side note the long crank time is unrelated to the present cable. A new question addressing this issue may get you some helpful responses
with so many accessories being fitted to most fourbys power demands are higher.Lets assume you are upgrading from a 55amp alternator to 110amp.Upgrading your wiring is not only important it is critical.Electricity causes heat and if cable can't handle load placed upon it the cable can melt.To calculate voltage drop
1000
volts=voltage drop length=total length of wire in metres current=amps through wire area=copper wire thickness in millimetres squared-most car makers use minimum allowable wire thickness.Huge cost savings when multiplied by millions of cars made
