Alright I drive a Saturn SL2 and I have a JVC HU and a cheap Kenwood Mono about 400rms and I have everything wired correctly I promise so why is when the car is in audible the cap reads about 12.88v and when I crank the car it just goes up to 14.06 and not higher until I hit the gas and get up to about 55 ?
alright thanks and let ne ask you a question how do you install a battery in the trunk to run amp and subs on would it be like :
1. + from battery to amp 2. - from batttery to amp
or do I need a battery isolator to do this because I don't want to have my car battery hooked up with me trunk battery then it will cause major problems
Your alternator works kind of like your engine- putting out more power at higher rpms. If you're really concerned about it I'd add a better alternator with an external voltage regulator. Just connect your + to + and - to - of the batteries.
A better alternator will help you get your voltage up more than more batteries, and besides doing the 'big 3' would be the first upgrade I would do. You need a decent alternator to keep your battery(ies) charged anyway.
better alternator will not help to get the voltage up.... never will do that it will only give you more current.... if you get a external voltage regulator THEN it will give you more or less voltage regardless of stock or other alt
Alternators with internal regulators can very. I had two identical powermaster 200a alts, one idled at 14.6, the other at 15.2volts. If you are draining your battery because the alternator isn't keeping it charged, you should definitely upgrade that before adding more batteries to increase the strain. A battery can not charge itself, and being that few will hold a charge of more than 13 volts for long, upgrading your alternator (which bare minimum should be at 13.8volts) will be the most beneficial first upgrade.
Alright can I use a Deep Cycle Battery put it in the trunk run a + from battery to and amp and negative and would be good to (wouldn't it kinda self charge itself or do I need a optima battery)