could anybody tell me what the stock alternator put out watt wise in a 89. 92 iroc with dual fans, fuel pump, lights, radio etc..? i just hooked up a single electric fan to my '83 z-28 efi and now the voltage drops below 13 v at idle! never did this with the mech. fan! is the drain that much? i believe stock for me is 80 watts.what have you guys needed to put in your modded rides?

 

alt. is usually rated in amps, 80 or 105amp
13v isn't that low,

 

At 14.5V that's 1160 to 1522.5 watts. W=IE