Why is my voltage drop so awful?

[hatedonmostly 5,000+ posts]

I have to agree, fuck your numbers. Who the fuck uses 4 gauge for big 3.

I had leftovers. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[BlactimusCrime 10+ year member]

Id take all your connections apart and sand the mating surfaces to make sure youre getting the best contact possible

 

[Magnus 10+ year member]

You shouldn't have ANY voltage drop across the system. It should all be the same. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[hatedonmostly 5,000+ posts]

Id take all your connections apart and sand the mating surfaces to make sure youre getting the best contact possible

All ground points have been sanded, brohamsandwich //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[Buck 5,000+ posts]

Did you mean the batteries should be a ton closer to each other?Or that the voltage should be a ton more with the batteries that close to each other?

I mean the voltage at your amp should be close to the voltage at your rear battery.

 

[hatedonmostly 5,000+ posts]

I mean the voltage at your amp should be close to the voltage at your rear battery.

I see.

Can I get my rear battery tested without disconnecting it from the system? When I got it, it was resting low at 12.4 and had never been used...

 

[Buck 5,000+ posts]

I see.
Can I get my rear battery tested without disconnecting it from the system? When I got it, it was resting low at 12.4 and had never been used...

I don't know, but it sounds like a connection issue, not a battery issue.

 

[350zspl 10+ year member]

change all your 4 awg in your whole set up from bumper to bumper with 1/0 or 0 awg

and it will be better i can assure you

and always run your system with the car on

so buy $100 worth of wire, spend and afternoon with your friends talking smack and swapping wire

and it will be fixed

 

[BlactimusCrime 10+ year member]

You shouldn't have ANY voltage drop across the system. It should all be the same. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

....if you assume no resistance in the wire, this is never the case tho, all wire has some sort of resistance no matter the size, length or material, though it may be minuscule.

 

[hatedonmostly 5,000+ posts]

I don't know, but it sounds like a connection issue, not a battery issue.

Alright, I'll try to check my grounds and distro...

 

[Autobox_Pro 10+ year member]

change all your 4 awg in your whole set up from bumper to bumper with 1/0 or 0 awg
and it will be better i can assure you

and always run your system with the car on

so buy $100 worth of wire, spend and afternoon with your friends talking smack and swapping wire

and it will be fixed

//content.invisioncic.com/y282845/emoticons/applause.gif.bb805d8088f72dbc2fe808c29e85fb4c.gif:applause://content.invisioncic.com/y282845/emoticons/applause.gif.bb805d8088f72dbc2fe808c29e85fb4c.gif:applause://content.invisioncic.com/y282845/emoticons/applause.gif.bb805d8088f72dbc2fe808c29e85fb4c.gif:applause:

 

[hatedonmostly 5,000+ posts]

change all your 4 awg in your whole set up from bumper to bumper with 1/0 or 0 awg
and it will be better i can assure you

and always run your system with the car on

so buy $100 worth of wire, spend and afternoon with your friends talking smack and swapping wire

and it will be fixed

I have 1/0 front to back, just 4 to the amp after the distro.

 

[350zspl 10+ year member]

I have 1/0 front to back, just 4 to the amp after the distro.

i think you typed you have 4 awg as your wire used in the big 3 in your op

 

[hatedonmostly 5,000+ posts]

i think you typed you have 4 awg as your wire used in the big 3 in your op

You're right, but nevermind.

 

[Stalin-ohaulic]

You're right, but nevermind.

There is obviously high resistance between the rear batt and the amp. If you're dropping .2 and there is no current being drawn, that is bad. In a parallel circuit the voltage should be the same. It's only once you start drawing current that the resistance of the wire should become evident. You need to either shorten the run from the back batt to the amp, or shorten the ground or both... or tighten something. It's right there. It can't be anything else.