Did the noob do a simple calculation? To deliver 800W you would need about 100A @12V into the primaries.

 

It always pains me when the automotive element surfaces after 3 pages of posts.

This thread is against the AAC forum rules, Chapter 6, on automotive modifications, as seen here:
http://www.allaboutcircuits.com/l_tos.html
Therefore, this thread will be closed.

Please understand the reasons behind this action and bear no grudge.
Feel free to tread on the rest of the forums.

You may find answers to your questions in one of the links provided here: http://forum.allaboutcircuits.com/showthread.php?t=54400