those who have installed a 3g alternator and have an electric fan

i just installed a 3g 130 amp alternator on my mustang. always before when i would kick the fan on you could watch the needle drop some on the volt meter on the dash. i figured that once i had the 3g on there that the needle wouldn't even budge now but it still moves down some until the fan gets up to speed. is this normal? it seems to be able to keep up now at least. always before all i could run with the fan was the low beams, nothing else. at least now i can run the fan on high and the lights on.

Sounds pretty normal to me. Mine has always dipped when I load it and recovers quite well. It tends to dip at idle with the headlights, a/c, etc. all on at one time too. I have never killed a battery or experienced any problems because of it.

thats good to know. i was hoping that i didn't get ripped off on ebay.

Mine does the same thing and I have the 200amp 3G alternator...

thanks guys. i feel better now.

Most fans will pull a huge start up amperage and then settle back down, I would not sweat it :D

same here.