How many Amps?

grebnereon Bronze Member Username: Grebnereon Post Number: 72 Registered: Mar-06	Posted on Sunday, May 21, 2006 - 00:10 GMT i want to run 1600 watts rms, i want to get an HO alt but im not sure how big to go, my car is a chevy beretta with not very many accessories...no power windows, no cruise, pretty much its just a base model. anyway, how many amps should my new alternator be?
/\|/E/\/\E/\|/ Silver Member Username: Nemen Post Number: 820 Registered: Dec-05	Posted on Sunday, May 21, 2006 - 00:56 GMT a 200 amp alt should be fined with your car.
Brandon Gold Member Username: Theelfkeeper Stockbridge, GA USA Post Number: 2183 Registered: Feb-05	Posted on Sunday, May 21, 2006 - 02:57 GMT 200 amps should be fine. watts RMS/12.6=amperage add that amperage to the stock alt rating or 40-50 amps. that'll give you a good base to go by in choosing a HO alt size. do know that getting one larger then needed won't hurt and will give you room to upgrade in the future. check out excessive amperage or iraggi. theres a group buy going on you might wanna look into. theres a thread in this section.
Optidriven Silver Member Username: N2audio Lawrence, Ks USA Post Number: 853 Registered: Mar-04	Posted on Sunday, May 21, 2006 - 03:56 GMT *"watts RMS/12.6=amperage"* Divide that result by about three before you add 40-50A for the stock electronics. Unless, of course, you play full volume test tones every second the car is running. If average volume music current draw were equal to full volume test tone current draw everyone running 500w or more would need a giant alternator.
Optidriven Silver Member Username: N2audio Lawrence, Ks USA Post Number: 854 Registered: Mar-04	Posted on Sunday, May 21, 2006 - 03:57 GMT wouldn't hurt to factor in efficiency of the amp as well, but if your 1600w is class D it won't make a HUGE difference -- they're 75-80%.
grebnereon Bronze Member Username: Grebnereon Post Number: 75 Registered: Mar-06	Posted on Monday, May 22, 2006 - 17:50 GMT alright guys thanks

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