Upgrading My Electrical System

[bs199sg]

Hey, I am looking to upgrade my 2007 ford focus SE 2.0l's electrical for my system. I have a 5000 watt sub amp and a 600 watt door amp. I know I'm running the stock alt, so that's 120 amp max. Aka that's around 1600 watts max. There are 2 4 gauge wires running to the amps.

I'm looking at a 370 amp alt https://www.dcpowerinc.com/fit/Ford~Focus~2007~2.3L-I4-Duratec/8407-370-xp.html . [/URL]

I also have to find 2 batteries; one for my trunk and a new main one. I was looking at xs power, but I'm stuck there. I know the one in the trunk needs to be a dry cell b/c of the fumes.

For the batteries, I was looking into installing a 200 amp relay right next to the main battery. http://www.amazon.com/Stinger-SGP32-Battery-Relay-Isolator/dp/B001HBYXVS .

 

I'm not sure if I need any more fuses than I already have. (one on each of the 4 gauge wires).

 

Also, kind of out of the electrical questions, but I also need a new sub box. I'm running 2 12's, and they need 0.85 cubic ft. to 1.75 cubic ft. of space in the enclosure.

 

Thanks!

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[Popwarhomie 5,000+ posts]

What amps?

 

[bs199sg]

Hifonics Colussus Pro 5k and a Polk audio PA 660

 

[Popwarhomie 5,000+ posts]

Iirc that amp did like 2500rms bridged at 2 ohms. You should be fine with a 270 amp alternator and a g31 rear battery. It has 1/0 gauge inputs.

 

[adulbrich 5,000+ posts]

Yea, the amp will not do 5k.

Should be fine with a bigger alt, two batteries, and zero gauge.

You don't need to waste your money on a battery isolator, unless you play your system with the car off. I also don't recommend playing your system with the car off if you only have one extra battery in the rear. Low voltage is an easy way to blow big amps

 

[bs199sg]

What amp fuse do you recommend? and I believe I need an inline fuse after the battery to my amps. Am I correct?

 

[Popwarhomie 5,000+ posts]

Depends on the wire used.