I just saw a new product from Flex-A-Lite. http://www.flex-a-lite.com/auto/html/ford-diesel.htm

It does warn that Electric fans are not recommended for primary diesel engine cooling when the combined gross vehicle weight (CGVW) exceeds 18,000 pounds (truck, trailer and load)

Any Opinions?

 

I like them. If I had 500 bones laying around I'd do it now. As it is, it's on my to do list.

 

i dont tow with my truck and i want them too. i heard they can give a "significant" improvement in horsepower, no fan or clutch to spin over. i like the idea of it.

 

My thoughts: A new fan clutch is around 250 bucks from what I have found. When my clutch goes out, I am going to go to electric fans.

 

I installed those fans on my truck about 3 weeks ago. I noticed a slight increase in power. I haven't checked to see if I picked up any mileage yet. The only complaint is that they are a little noisy, but its not that bad. It does help keep my tranny cooler at low speeds though.

 

noisy? how noisy, as loud as the stock fan with the clutch engaged? do the two fans move more air than the stock fan does without the clutch engaged fully?

 

I've got a dual Flex-A-Lite fan on my 98 Suburban 6.5 turbo diesel- I know what you are all thinking- but I needed a people hauler and Ford didn't have the Excursion when I bought this. Any way, I have almost the same fan in that rig and it works good but didn't notice any mpg improvements like were claimed in the advertisment. It moves 5500 cfm when it is on full power and the only way I can hear it is if the window is down and moving slow. The one downside to it is it is wired into the A/C so in the winter when the defrost is on so is the fan on and I have to keep a winterfront over the radiator to keep the temps up.

 

Why wouldn't a person wire the electric fans to an adjustable temp controller so the fans kick in only when needed? I have this set up on my hot rod lincoln and honestly the fan rarely kicks in, but is always there if/when needed. If/when I put this dual fan set up on my truck, I would for sure go with an adjustable temp switch. There is no sense to wiring electric fans for always on, HP gain from losing the stock fan is lost due to more HP needed to crank the alternator to keep the battery charged.

 

Wonder why the CGVW is reduced by 2000# for the excursion or the F250

 

The fans do have an adjustable temp setting. Mine are set to come on 5* over the thermastat temp and the fan comes on at 60% power and at 10* over temp they kick up to 100%. The only time they are always on is when the A/C is on, even at highway speeds. I need to wire them into the head pressure switch on the A/C to they only run at low speeds or idle. The 29 amps they draw probably reduces and hp gain from removing the fan clutch.

 

I installed flex a lite fans yesturday on my 07 f150. They are quite noisy, even over the roush cai and exhaust. The engine seems to rev alittle quicker but I'm not so sure it was worth the effort.

 

I'd say that very statistic pretty much debunks the whole thing...

 

If you run fans 24/7 you will run too cool and gas mileage will horribly stink