91LXStang2727

Could it be that the stock alternator isnt strong enough with my underdrive pullies an 1200 watt audio system? If so would a 100 amp alt. do the trick?

Goosepoop302

that is definatly the problem

do you have a capaciter on your system??
also im not sure how strong you would need

Goosepoop302

you cna go take a voltage meter to it with the car on and tell us what it says its at

91LXStang2727

I dont think i have a capaciter an i did just get volts checked an they said it was fine so im thinkin mayb i jus need a stronger alt.? I just dont know how strong i should get. I was thinking the 3g but id rather get the 100 amp if it will b fine.

Goosepoop302

well do you know what the volts were at??? basicly waht a capaciter will do is store any excess power that your system is gunna draw when it hits, that way its takes less strain off the rest of your electrical system.

if it turn out that your volts are ok you prolly need a stronger amp, your alternator pully is slowing this one down so its not charging as much

91LXStang2727

I beleive he said it was at 11 and thx for giving me some info.....appreciated

Goosepoop302

i think while the car is on it sould be closer to 14 but correct me if im wrong

5.0 MPG

you deffinately need a new 3 g alt

91LXStang2727

Getting a 3g alt. installed tomorrow i cant wait.

frop

11 volts is a pretty much a dead battery. 14.5-14.7V(when running) is what you should see, though 13-15 is acceptable.