Most high end speedos have been comming with 14 guage wire as of late.. that is what is recomended.. the wire does not make more power.. the speed control only puts out so much.. Larger wire wont force the speedo to have a higher output.. if your wires get warm or hot, it is bacause of resistence.. then going to a lower guage my help.. If they stay cool, there is no need for it.. i dont like 12 guage.. I run pan cars, and it is just to thinck..plus i dont see a need for it..
HERE IS MY TRADER FEEDBACK ON HOBBYTALK. http://www.hobbytalk.com/bbs1/itrader.php?u=8257