Re: Do I need another batt. or upgraded alt.?
Its depends on output of factory alt. I ran about 1200 watts total on stock battery and electrical. Now I have about 1900 and have optima up front and small battery in back off factory alt.
2009 Pontiac G8 GT, New Era Intake, Doug Thorley Exhaust, Patrick G Tune
Building: Hybrid Imagine 6.5 front, Image Dynamics CTX 5.25 rear doors. Peerless SLS 8's rear deck off of Kicker ZXSum8 and ZX 700.5
2007 Toyota 4Runner
Eclipse XA100 sub amp and Incriminator 187 10 in 1.6 cubes
Working on Double Din, nice 6.5 Seperates and 6.5 coaxs rear
Refs: Pike110,Hintzyboy,dcmcki, qcsfinest704, MagickMan, allstar1500bd, ravemeister, Team PSI, Jntar, Brian Owens, and others....so many