Adding battery to the Suby

[truz05 10+ year member]

ok. so ill tell you all what i have now, and what I plan to do

Class D 5-channel Memphis... about 1400w rms amp. sub is wired at a higher impedance than 1ohm so it's drawing less. I'd say about 1000w rms.

Car = 99 Subaru Legacy Outback. right now just the one stock grp 35 battery. 85 amp alternator.

Plans = Big 3. Now i'm also looking at the Carquest private label version of the Deka Intimidator, which is pretty much an Optima Yellowtop. I cant exactly fit this battery in the stock place, and im not about to rewire the battery cables. So i'm thinking why not put the Deka in the back?

Questions = How do I add the battery to the back? Will it charge itself through the alt? What size cable am I going to be running and from where to where? Right now I have 4 awg running from the battery in front to the amp in back. Thinking of using this same wire to go from the new Deka battery in the back to the amp in the back. And was thinking of using the rest of it to do the Big 3. Would the 4 awg cut it for either jobs?

thanks

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[truz05 10+ year member]

also, will any distr. boxes help? and will I need another fuse? thanks

 

[Boulderguy 10+ year member]

You can get away with the 4g since your system isn't huge but you're dancing on the edge my friend. Better to use 1/0 to connect batteries, 'specially if you're running the system with the car off.

Run a single length to the new battery & fuse it at both ends - 250a if 1/0 cable. Then ground at frame. Don't know who that battery manufacturer is but be sure it's sealed like the Yeller-tops if you put it in the cabin.

 

[mlstrass 5,000+ posts]

I just added a Deka Intimidator and wired it with 1/0. Grounded to the frame as suggested above.

VERY nice battery, better than a YT //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif