Second battery in rear question!

[bassrace]

Btw running a negative from the front battery to the back battery is not necessary just ground it in the back. You could ground in 1 spot in the back and use a distrobution block to have spots for a few wires.

thats a really generic answer, some cars are not unibody and are welded together, and having just a ground spot in the back will cause horrible voltage drops, it all depends on the car, most of the time it is fine, if you are doing a huge build with lots and lots of power then its worth it to tun that negative wire back there, you will not only get steady voltages, but will be better for your amps as they dont have to deal with a shitty ass ground, also you have to have the same size ground wire as the positive wire, so if you use a distro block with lets say 3 8gauge wires coming out, then you need to make sure that you positive going into the amps are 8 gauge, and if that power wire is to small then you need to upgrade both neg and postive to bigger wire, it has to complete a curcuit.

Yea it was "generic" but to the point i doubt hes running crazy amounts of power so i dont think it would matter in his situation although it might i was just letting him know that he didnt have to do the negative that way he could just ground it in the back and as long as he had 0/1 awg wire goin to the distro and no more than a couple 4awg or 3 8awg it should be fine imho

[crunkjuice1]

The reason I ran ground from front to rear battery is because I doubt the efficiency of my cars frame so the direct path from negative to negative can only be done wire power wire IMO. Every car is different but the most direct path should be best. After figuring the rear battery out just ground and power the amp off the rear battery since both batteries are parallel the amp just sees one battery anyways.

[bassrace]

The reason I ran ground from front to rear battery is because I doubt the efficiency of my cars frame so the direct path from negative to negative can only be done wire power wire IMO. Every car is different but the most direct path should be best. After figuring the rear battery out just ground and power the amp off the rear battery since both batteries are parallel the amp just sees one battery anyways.

X2

[08tahoe]

Btw running a negative from the front battery to the back battery is not necessary just ground it in the back. You could ground in 1 spot in the back and use a distrobution block to have spots for a few wires.

thats a really generic answer, some cars are not unibody and are welded together, and having just a ground spot in the back will cause horrible voltage drops, it all depends on the car, most of the time it is fine, if you are doing a huge build with lots and lots of power then its worth it to tun that negative wire back there, you will not only get steady voltages, but will be better for your amps as they dont have to deal with a shitty ass ground, also you have to have the same size ground wire as the positive wire, so if you use a distro block with lets say 3 8gauge wires coming out, then you need to make sure that you positive going into the amps are 8 gauge, and if that power wire is to small then you need to upgrade both neg and postive to bigger wire, it has to complete a curcuit

what if im running two different brands of wire to the back, would it make any difference? they are both 1/0 gauge and ofc but the - is streetwires ultra flow and the + is jl audio metawire

[bassrace]

The jl is better but it isnt going to hurt anything using diff. Wire

[crunkjuice1]

only thing I can say is keep your 4 gauge runs as short as possible if your amps take that for power and ground. If they carry more than they can handle you could melt the jacket on it and burn your car if they aren't fused to protect the wire.

[08tahoe]

The jl is better but it isnt going to hurt anything using diff. Wire

thanks!

[dereileak]

The jl is better but it isnt going to hurt anything using diff. Wire

thanks!

remember to fuse at both batteries withing 10 inches, for both wires running back, some people get lazy and dont fuse everything rigth

[bassrace]

The jl is better but it isnt going to hurt anything using diff. Wire

thanks!

remember to fuse at both batteries withing 10 inches, for both wires running back, some people get lazy and dont fuse everything rigth

X2 most deff

[08tahoe]

ya i got it fused after the first batt and before the second with 200amp anl fuses but i just ordered 300 amp ones today. and i thought it was within 18 inches?