An fairly large voltage drop can be accomplished in an exceedingly small resistance by applying an exceedingly large current.
That's exactly the situation I have.
12.65-12.79 (lead-acid to AGM) volts and a .7 kilowatt starter motor (i.e wants 53-55 amps or so). The original equipment circuit takes 7 seconds to start a motorcycle and mine (all copper from tip to tip except for the tin plating on the terminals) starts the bike in 1 second.
I have shade-tree mechanics that want to get into measurable resistance arguments and I need an authoritative resource to point them to to satisfy them that I am not making things up (i.e the increased resistance is almost unmeasurable but the result of removing that unmeasurable increase is easy to see).
So hopefully I can get a site with figures shown and or some sort of equation that will allow me to show them hard numbers.
I'm also looking for any data on the added losses as current crosses from one type of metal to another, copper to steel and copper to brass etc. And of the losses of wire to terminal transitions (of even a brand new junction).
Any pointers towards hard numbers on things like the loss of 2, 6 inch pieces of copper wire with a brass butt connector in the middle vs. a straight 12 inch piece of wire is also desirable.
Part of this is what I would call a "green initiative". My circuits will allow motorcyclists to extend the life of their batteries 2-3 times and that means a lot less toxic lead-acid batteries to be properly disposed.
Again, thanks for the quick reply.
M./