I've been running Efans for a few months now and have learned quite a lot. I am running Dual 10" fans from amazon part# RAF-10-RD+FMK-X2 just wired to a switched ignition signal. I did run the Hayden fan controller but that died after 2 months. part# 3651. I made my own fan shroud out of 1x1 aluminum angle and some checkerplate i had lying around. With just the fans and shroud with no special ducting (this matters) around the sides to force the air through the rad.   My rad temps in th