with the added electronics to my car like fog lights and 4 channel amp and soon to be subs is a stock alternator good or do i need a high output one

 

Do your big 3 n you should be good. I run ~5000 watts on my Caddy with a stock alt, it is a 140amp compared to civics 90 though.

 

well i got a 1000 watt amp and then prob another 500 watt amp so i should be good right? and i thoght my alt was only 75 amps

 

i think your on the edge of the stock alts output. after you get it installed puy a meter on the pos & neg terminals of your bigger amp then turn it up to your listening level if it drops below like 12.4 i'd seriously think about doing a HO alt ,,,, amps like to clipp at low voltage and this will kill your subs, a extra battery will help but its just a band aid

 

what if i got a capacitor to take care of the amps

 

it's like a battery but doesnt have much for reserve caps charge and discharge fast.. it would help but you need to find out what your voltage is dropping to and then go from there. you might be fine

 

Simple. Hook your sound system up, and yes, use a cap (1F i recommend) for your sub amp, Turn it up at night with your lights on, something dance or rap with nice doof, and see if your lights dimwith ever bass thump. If they do, get a bigger alternator

 

i dont have a sub amp yet just an 80x4 rms amp for my speakers should i get like a 500k cap for that? and then get a 1f when i do get subs

 

You generally dont need caps for speakers, cause the power drain is alot less and more constant. With subs, it requires lots of power in short bustscalled spikes, and caps, well they deliver lots of power in short bursts. The basic rule is 1F per 1000w. But the cap has to charge from somewhere... the battery. The fact remains that you may need a bigger alternater, with or without caps.

 

ok where is the cheapest place or website ot buy a high output alternator from