What´s your impedance rise? we wired a ZX to 1 ohm for about 3 months on a friend´s car and it worked great, impedance rise was x3 tho so maybe we were lucky hehe, but maybe you could wire it to 1 ohm for a couple of minutes just to test how loud can you get by reconing the subs
You do have a great alt and nice batts.
im not sure what it is how can i find out?