Anyhow, over at LightningRodder.com, the discussion comes up frequently. It's agreed by everyone that the stock clutch fan works better than electric fans. Especially for street driven vehicles in stop-and-go traffic. It's even been agreed upon that the electric fan doesn't save anything power wise because the alternator has to pick up the slack to keep the battery charged. When the alternator is working overtime, it adds more drag to the engine.
So, Six-Of-One, Half-Dozen-Of-The-Other. Years ago, had an efan that I had put on another truck, die on me in city traffic. Just gave up the ghost and quit working. Worked fine,, til it didn't. I swore I'd never do one again. Then I got swayed into trying one on my Lightning. Got it all mounted and wired, started truck, when the fan should've come on, big bunch of smoke came out from in between the fan and motor. Big, thought the truck was going to catch fire. Don't have a fire extinguisher in my garage. Will soon. Took off efan and wires, tossed it all in the round-open-top-file. NEVER AGAIN!!!!!! Wrote off the monetary loss as a live and learn experience. NEVER BUY ANOTHER DAMN EFAN! Tried em twice, got stung twice. Once is a mistake. Twice is pure stupidity. Yup, I'm stupid, dumb as a box of rocks. For having done it a second time.
I'm not concerned with a few hp, nor a few mpg. Not worth the risk. I'll keep the clutch fans.