Would to add a electric fan 2005 5.4 f150 but heard that it's not a good choice...

 

whats the reason why it would not be a good choice??

 

Yea and I would to speak a English...
Why wouldn't an electric fan conversion be a good choice? Less overall drag on the motor, so more throttle response, more power to the ground, better gas mileage, and theoretically the motor should last longer. The only downside I can possibly think of is if you plow a LOT of snow without a skid plate, it can pile up in the fans and burn them out, which with a stock fan that won't happen.

Do it, you won't regret it. There basically aren't any downsides. Its one of the best bang for your buck upgrades you can do.

 

How do you install one??

 

I heard sitting in 100+ degree temps idling your ac won't be able to keep up from not enough air flow. but my a/c and the a/c in alot of these trucks is crappy to begin with.

 

we are talking about a HP gain to the rear wheels of 2-3 HP aren't we? I have researched this a few times and most people I hear from comment that yes it does reduce strain on the motor, etc. but that the performance gain is truly negligible...

 

At maybe 1000 rpm. Troyer's numbers and others show 12-19 hp at the wheels on a dyno run. Done right efans are a good way to free up some power, this is why all the 2009+ F150's are coming from the factory like this. My old truck had efans and never had a problem.
Pros:
-Less parasitic drag on the motor
-Better air conditioning at idle
-More power
-Possibly more mpgs (depends on driving style and other factors)
-Ample cooling
Cons:
-The stock fan is more reliable (not much for there to break, but efans won't either if done right)

It's all about quality fans, controllers, and wiring. Solder and weatherproof all connections, get a quality fan (Ford OEM, Derale, and SPAL are my favorites), and a good controller (DC controls, my pick) and you'll have little worries about efans being there. So to answer the question, yes it's a good choice if done right.