- Apr 7, 2019
- Reaction score
- My Car
1990 Bronco, Eddie Bauer, 306ci
1978 F150 Ranger, 545 Stroker
1973 Mexican Mach 1 ( final confirmation TBD), 351C
So I now know the capacity of the factory alternator, at least in its current condition...I am running an 800w stereo amp, a USB GPS speedo, and an iPhone charger....that is too much draw for the installed alternator. I know this because the battery lacked the juice to start the car in the shopping center parking lot. it may be obvious I guess, but the OEM alternators just weren't designed for modern draw. I'll be installing an upgrade asap.