I will be installing a 3G in my car soon and I am planning a system. I will be running an electric fan and maybe UD pullies. How well will I be able to keep up with 1k-1300 watts. I probably wont go this high but just in case, I would like to know.
That's a hefty load on any car. First off, you'll need to have atleast 2g wires for everything. Make sure your alternator is directly connected to your + battery terminal with the 2g wire and reground the alternator with the same wire. I would definatly suggest running a second battery in the trunk with a seperate ground, but connected + to + with the first battery under the hood. The MOST important thing with this much wattage is fusing! Make sure you have a fuse with in 18" of the battery under the hood and another fuse before the amp. If you neglect the fuses, one small short can catch stuff on fire and everything you have done will be wasted.
I already have 1/0 gauge wire that I will be upgrading with and I will be placing my fuse within 12" of the battery.
Even better, most people get discouraged by the price of 1/0 wireing. That's what I use for my 2 MTX 1501D's and my MTX 6304.