I've been running a 16" electric fan {2,000 cfm.} with a 170 deg thermastat for 2 years now. I have it wired to a relay so it comes on with the ignition and stays on the whole time. If the engine heats up or I turn the AC on the stock pusher fan comes on to help out. I have had no problems with this setup at all. No shroud, just mounted to the radiator core using the mount kit that came with the fan.