HO ALT not an option, what else can I do?

[bgowdy 5,000+ posts]

How big an alt will I need anyways? The way I calculated it was 4000W/13V=307A. Since my stock was 135A add that, so I would need 450ish?If my stock alt is rated to do 135 A, how much do you feel it can safely be rewound to do, without getting into thermal problems?

hm... id say you would be ok with a 250amp alt and and a couple of good batts plus the stock batt under the hood(3-4 total). i have a 220a alt with stock batt and 2 batts in hatch(all 3 are shotty lol) but still manage to stay above 13v depending on song, also mine are pretty dead right now seeing i havnt actually charged them in a while lol so mine would probly be higher if they were charged because my system comes on the second i start my truck lol

 

[MECHMAN 10+ year member]

Guess I'm the only one who is enjoying living in the "Untied States." :/

 

[RodeoSport 10+ year member]

If all else fails, maybe look into a GM 1 wire conversion.

Could you please elaborate? Im not familiar with 1 wire alts.