300 amp X 12 volt Circuit breaker

[Excaliber]

The theory, and the math, are solid of course. OK, so here's your next weekend project, Pat, move your battery to the fender and rig up a short cable of same size and take some readings.

Bonus points: Then use a smaller cable!

Oh, I thought your battery WAS in the trunk! Mine is and my cable is certainly longer than 32". Don't know the size, but like me, it's really big.

[patrickt]

Originally Posted by Excaliber

The theory, and the math, are solid of course. OK, so here's your next weekend project, Pat, move your battery to the fender and rig up a short cable of same size and take some readings.

Bonus points: Then use a smaller cable!

Oh, I thought your battery WAS in the trunk! Mine is and my cable is certainly longer than 32".

I'll get right on it.

[patrickt]

Ernie, this is a really nice little article on "voltage drop." It's what you want to know and it is explained very well. http://www.engine-light-help.com/voltage-drop.html