incognyto

I just grabbed the biggest battery that I thought would fit... ripped the stock tray and battery cover out and extended the hold down clamp a little.... as you may see in the pic... another thing I did was remove the daytime running light's (you may not have if your not in canada) fues from the fuse box so I don't have the damn light's running all the time... and I can turn them off when I get somewhere without haveing to put on the ebrake and restart the car!! I think every little bit of voltage and current will help with my boom

hey regal, I also have a 2003 honda civic, glad to see someone else made the mistake of buying one haha j/k the stock alternator is about 70 amps if lucky i've heard theres some sort of ELD (electronic load sesning) or something like that. if you are still running the stock small honda battery go get a big one they will fit... i'll try and upload the pics of mine. I have 800 watts rms (j/l 500/1 and 300/4) with only the big battery I can still get the lights to dim I have the big three done with the exception of the alternator which will be done shortly after this message is completed. I have a marine rv deep cycle in the front and will be installing an AGM battery in the trunk with a 200 amp relay so that the batt's arn't connected less the car's running, i'll let you know if I can dim the light's after that, but i'm guessing no. I do have a cap with a digi volt gauge, I'll be removing it to see if there's any noticable differance. I'll also get tracking down a sc 144 GM alternator 120-145 amp alternator and hopefully get my buddy bill to weld up some sort of a bracket to get dual alternator's. OH and big three is extremely easy!! just DO IT!! it really isn't rocket science!! battery in 2003 honda civic