i would hate to rain on everyones parade and piss people off...
but getting a CAP will do nothing for you!
yes your lights wont dim (if thats the only problem you want to fix then a cap is good)
but ur problem is with a cap u are working ur alternator twice as hard!
with a cap ur battery is shooting power to the cap when it drains and ur alternator has to dish out even more power because its charging the battery and the cap!
the WORST thing would be to get a 5 farad cap!
all a cap is, is an extra battery, and would anyone here hook up 2 batterys for ur one alternator to charge???
i know a very lot about stereo systems, kinda weird this is the first time posting in the car audio section! (never even posted on the old forums)
this is weird that your lights are dimming!
im running a solid 7-800 watts no cap, stock batt and alt and no lights dimming!
i also have a digital fuse block that reads the car voltage and i have not ever dropped lower than 13.8 volts!
i would understand with the people running 2-3 amps and anything over 1000 watts would dim the lights!
also whoever said, you add up the numbers on the fuses on the amp to find out the amps is wrong!
there is a formula to convert watts to amps! i will get that for you guys!
i know just to run the car you are pulling between 25-30 amps constantly!
so all i need to do is find the formula and it will tell you how many watts you can run safely! with the 45-55 amps that are free!
on saturday im going to get my system tested for spl
because i know someone is thinking (he only has a 700 watt amp thats why hes not dimming his lights)
just by ear i think i might hit between 150-160 DB....not bad for 1 sub!
heres the formula!
volts x amps = watts
so if volts x amps = watts than ...
watts divides by volts = amps!
so if u have a 420 watt amp running at about 14 volts ur pulling...30 amps!
which means you are very safe!
i remember there being things about the very shitty batteries put into the hyundais.....might wanna check into that!
my 700 watts is pulling 50 amps!
so im running the alternator at the max 80 amps with car running
(and by the way....not to be a smart ass but my amp isnt running a 50fuse..)
that info should help