72 Demon slanty-to-340 Resto

moparmat2000 said
I see a lot of posts on the 100 and above amp alternators in these old cars. Can somebody school me on this. Why does one need a 130 amp alternator in one of these cars anyways. I put a 50A in, and enlarged my output wire to 8ga marine grade based on the length of run required, and bypassed the bulkhead. I plan on running everything as LED for effiency, except the headlamps because i hate the hokey look LED lamps, i plan on a small stereo, and no electric fan. I prob actually could have gotten away with a 35A alt, 10ga wiring, and the bypass.

Are you putting in EFI, a big booming system with a cinder block sized amp, and maybe a killer CB system where you want to talk to people several states away. Look at the power requirements for what that your planning on adding.

The 130-140 was an overestimation on my part, I'm not big on electrical. The 100A I'd guess is more for wiggle room in conjunction with the more modern stuff.

Same with the LED stuff where possible, plus less often changing lights. The electric fan would be the most draw from any single part of my system. idk what the EFI draws exactly. A more modern starter would be a good idea, starter obviously draws no power from the alternator but one that demands less power means the alternator works less charging the battery.