Advice/Questions new system

[Tenacious]

Back to my original question, when I have 2 amps hooked up.. Should I get battery in trunk than? Or just upgrade the alternator instead of a new battery in trunk..Or just do big 3 and call it.

Do the big 3 and a single battery in the back won't hurt anything. No need to upgrade the alternator for that kind of power unless you have an old car with a very small alternator

 

---------- Post added at 11:55 PM ---------- Previous post was at 11:54 PM ----------

 

And the volt meter is a good idea. They're worth the $2 they cost on eBay

 

[NASTY08IMPALA 5,000+ posts]

Do the big 3 and a single battery in the back won't hurt anything. No need to upgrade the alternator for that kind of power unless you have an old car with a very small alternator 

---------- Post added at 11:55 PM ---------- Previous post was at 11:54 PM ----------

 

And the volt meter is a good idea. They're worth the $2 they cost on eBay

i would start with the batterynder the hood first .i wouldnt put a good batt in the back with a crappy one up front

 

[darron016 10+ year member]

Why get a voltmeter? so i know it is changing volts? whats the point of that?

 

[NASTY08IMPALA 5,000+ posts]

to watch rhe voltage and make sure its not dipping too low..wire it directly to amp..its a must have

 

[darron016 10+ year member]

Wire it directly to which amp?

What should the voltage be at? And what is too low?

And what should I do if it does dip too low?

 

[NASTY08IMPALA 5,000+ posts]

wire to sub amp ....should be around 13.8 -14.4 with car running ....dont dip below 12 and if it does turn it.down ..this will let u know how.good ur electrical is

 

[Tenacious]

i would start with the batterynder the hood first .i wouldnt put a good batt in the back with a crappy one up front

Depends on how old his battery under the hood is. If its pretty old then yea, it's worth replacing it anyways

 

[tommydh 10+ year member]

Do the big three first. I have a Hifononics BRZ 1700 @2ohms and a 4 channel pioneer amp in a mini cooper with stock Battery and alternator only have 2 of the big 3 done grounds and am not having any problems with dimming at all. Im running 1 sd-2 10 soon to be 2 of them as soon as I finish my box

 

[NASTY08IMPALA 5,000+ posts]

Do the big three first. I have a Hifononics BRZ 1700 @2ohms and a 4 channel pioneer amp in a mini cooper with stock Battery and alternator only have 2 of the big 3 done grounds and am not having any problems with dimming at all. Im running 1 sd-2 10 soon to be 2 of them as soon as I finish my box

yea but hes already experiencing dimming issues.big 3 isnt a miracle fix. id say he needs at least a god batt under the hood if the stock one isnt new

 

[darron016 10+ year member]

I have a stock battery but I just put it in last year bought it from O rillys so it is relatively new.

Yes I was thinking of only doing 2 of the 3 because the 3rd one was confusing.. I can do ALT to batt easily and batt to ground easily.. But the other one about the motor is confusing so I might just go with the 2,

 

[darron016 10+ year member]

yea but hes already experiencing dimming issues.big 3 isnt a miracle fix. id say he needs at least a god batt under the hood if the stock one isnt new

Stock is new, I replaced it thinking my old battery was dead. Come to fine out I needed a new alternator instead. My alternator is 6 months old.

 

[tommydh 10+ year member]

yea but hes already experiencing dimming issues.big 3 isnt a miracle fix. id say he needs at least a god batt under the hood if the stock one isnt new

I agree Im just waitig for my factory battery to die before replacing it. Now the way I was taught as Electrician when running Multiple batteries they need to be the same ones

 

---------- Post added at 01:29 AM ---------- Previous post was at 01:28 AM ----------

 

Stock is new, I replaced it thinking my old battery was dead. Come to fine out I needed a new alternator instead. My alternator is 6 months old.

what type of vehicle is it?

 

[darron016 10+ year member]

Chevy cavalier 1999

 

[NASTY08IMPALA 5,000+ posts]

the big 3 isnt confusing ur makin it harder than it has to be buddy..step 1 run fused power wire from alt to positive battery terminal..step 2 run ground from case bolt on alt to negative on battery ..step 3 run ground from the frame to the negative battery terminal...dont ground to block of engine

 

[tommydh 10+ year member]

I have a stock battery but I just put it in last year bought it from O rillys so it is relatively new.Yes I was thinking of only doing 2 of the 3 because the 3rd one was confusing.. I can do ALT to batt easily and batt to ground easily.. But the other one about the motor is confusing so I might just go with the 2,

that is the easy one you ground your engine block AKA alternator ground to ground point. You should probably see a braided strap or something similar there now.