Alternator Amps Produced and Drawn

[prossett]

I read from a search that the stock 83 Jimmy petrol engine alternator produces just 37 amps! Is this correct?

Where do the amps go with a stock set-up? I also need to add the draw from three 55W lights, so 13.75 amps.

 

[1985_K5_Silverado]

I read from a search that the stock 83 Jimmy petrol engine alternator produces just 37 amps! Is this correct?

Where do the amps go with a stock set-up? I also need to add the draw from three 55W lights, so 13.75 amps.

Same in '85, 37 amp alt was standard, 66 amp was optional. With standard lights and whatnot, this was plenty. However, with high-current accessories, such as one or more electric cooling fans, huge stereo amps, hi-wattage driving lights, and so forth, it's easy to draw more than you make with all that non-standard stuff running.

 

[dyeager535]

Draw would essentially have been the heater blower motor, radio, ignition system, and lights. That's base only of course.

Heavy duty heater, AC, etc. would likely have resulted in a higher rated alternator.

If the alternator is stock, Amp rating is stamped on the alternator case. Not always visible with the alternator installed IIRC.

 

[R77K10]

time for a larger alt

lots were 63 or 82 and others

were billions of different alt amp ratings over the years in stock factory form

can have a local battery or electric motor shop build one up for ya