Quote:
Originally Posted by Tony
I don't know about EMP proof, but I had a 600 watt audio battery for a main battery in my sedan. It's been pulled out and waiting on a twin. I've got a battery box I built years ago for a full size battery that I'm outfitting to hold both batteries, fuse, cutoff switch, distribution block, and battery tender jumper.
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Old cars like ours, it's just about protecting the ECU from an electrical surge within the circuitry.. so I'm building a grounded bi-metallic box out of aluminum and copper to put it in. Plus probably some grounded copper/aluminum rings around parts of the harness to pick up some of the enduced current back to the battery, kind of like a noise filter.
Shouldn't have to be very heavy gauge stuff though, and car batteries are meant to absorb voltage spikes as much as much as start your car.