Just read the entire post on the flex a lite ( flexalite )fan review from 2006-2007. After searching their hasn't been much on them lately. Any new info on them either good or bad? I just installed a set and was curious on how they have come along since the last post in 2007.

I talked to some of the "REAL" vendors here, and they said not worth the money.

Less air flow than stock fan.

If your running at the track, great!! You can turn on and turn off as needed.

If you "USE" your truck, save the money run your stock fan, maybe invest in a better tune!!:D

My stock fan clutch locked up and was spinning all the time. I got a pretty good deal on a set of these electric fans so I figured I would try them. They were about the same price as replacing the clutch unit. Thanks for any input

I still use them and like them. If you spend most of your time towing/heavy then I would not recommend them but for the performance guy, they are great. My guys love them.

There's a guy build he's own fan units, different ones to choose from to. It has been mentioned here in a thread but, he is on a different diesel site. they sound kinda spendy but from what everyone the says there more then worth it. I wanted a flex lite fan but it sounds like its just using money as fire starter.

Look up fan damn on the dieselspot forum.

2 3.8 ford fans from a tarus or t bird and a derale controller will do the trick for half the money and push more air

i was not a fan of the flex a lite controller i had on my 01 it was junk

how did someone figure out the flex a lite fans didnt flow enough air?

do the other electric fans flow any better?

even when i am not towing, my truck starts to heat up to 215-220. in the winter they work great, but when summer comes they suck a$$. the controler is junk. i have gone through 2 of them. get something else. wish i could find a better fan set other than stock. i did however get an extra 2 mpg takeing the stock fan off. the only good thing i can say

how did someone figure out the flex a lite fans didnt flow enough air?

do the other electric fans flow any better?


Well, TxChristopher and I did some testing. This was with his Fan Damn Max, which is twice as strong as a Flex-A-Lite system.

Clutch fan at full lock up pulls more than 10,000cfm through the stack at 2500rpm. :eek: His Fan Damn Max pulled a little more than 4500cfm at 2500 rpm.

Now, this seems as a huge differance...and it is, BUT IF the clutch fan is at low enguagement, it's pulling 4900cfm at 2500rpm. Which is the same as the Fan Damn Max.

So, if you can keep your temps down where the clutch fan never enguages, then the Fan Damn Max or Fan Damn HO are in your future. But if you get a lot of clutch fan activity......you need to stick with the stock fan clutch.

flex lite's own website says not to use if gross weight 18,000 pounds or more. So they state it doesn't work well enough. You can sometimes find remanufactured ones on ebay for about half price, but I wouldn't buy one.

Well, TxChristopher and I did some testing. This was with his Fan Damn Max, which is twice as strong as a Flex-A-Lite system.

Clutch fan at full lock up pulls more than 10,000cfm through the stack at 2500rpm. :eek: His Fan Damn Max pulled a little more than 4500cfm at 2500 rpm.

Now, this seems as a huge differance...and it is, BUT IF the clutch fan is at low enguagement, it's pulling 4900cfm at 2500rpm. Which is the same as the Fan Damn Max.

So, if you can keep your temps down where the clutch fan never enguages, then the Fan Damn Max or Fan Damn HO are in your future. But if you get a lot of clutch fan activity......you need to stick with the stock fan clutch.

When is Fan Dam HO going to be available?

that makes sense, but i occasionally haul a load or two, and its usually relatively heavy, so im guesing this fan setup isnt for me, and ill find power somewhere else

again 2 ford 3.8 fans will pull 9000 cfm there as close as you can get

When is Fan Dam HO going to be available?

They are available now. :)

again 2 ford 3.8 fans will pull 9000 cfm there as close as you can get

Where are you takeing your measurements from?? Is that open air or in the front of the stack?

Where are you takeing your measurements from?? Is that open air or in the front of the stack?

Im interested in knowing as well! I wonder what the amp draw is under full load?

Just came back from the races. I was pulling a 22' enclosed trailer with 4- 4 wheelers. Going up a long (2-3 mile) pretty good grade about 80degrees out and the temps displayed on the edge on my truck went to 225 degrees engine and 215 for the tranny. Air not on windows down. Temps seemed high to me but I never watched them before I put the fans on. I think I will watch the temps. Hate to do it but may have to buy another clutch unit and stick the stock fan setup back on

They are available now. :)

Nothing shows on the website specifically Fan Dam HO, is this another model(upgrade) from Fan Dam?

Just came back from the races. I was pulling a 22' enclosed trailer with 4- 4 wheelers. Going up a long (2-3 mile) pretty good grade about 80degrees out and the temps displayed on the edge on my truck went to 225 degrees engine and 215 for the tranny. Air not on windows down. Temps seemed high to me but I never watched them before I put the fans on. I think I will watch the temps. Hate to do it but may have to buy another clutch unit and stick the stock fan setup back on

I so wonder how these fans will do on my LB7 here in Hotter Then Hell Texas???
I have read in the past that if you have A/C on that these fans run 100%, meaning both fans on full blast. I wonder if your truck would have run cooler even though you would have A/C on? Could you go try that and report back to us?:D I have never seen my oem dash coolant guage higher then 195-200 and my tranny temps highwer then 170. I wonder how far if any these guages are off?

I still use them and like them. If you spend most of your time towing/heavy then I would not recommend them but for the performance guy, they are great. My guys love them.
Towed other trucks to pulls in 90 + temps and never got hot,80 to 85 mph,air on,I need a set for old red :D,but no $$,I think I gained 1 to 1.5 mpg with the fans installed

Nothing shows on the website specifically Fan Dam HO, is this another model(upgrade) from Fan Dam?

He's still slow on this updating thing. Wish he would get better about it :rolleyes:

It is offered as an upgrade for those who already have the Fan Damn, or it can just be purchased for $770 out the door. The Fan Damn HO is simply one regular Fan Damn fan and one Max fan. I can tell ya, I have never heard an electric fan pull so hard as the Max fan can. Hopefully soon I'll be testing out the Fan Damn Max under full load, full heat conditions.......

Just came back from the races. I was pulling a 22' enclosed trailer with 4- 4 wheelers. Going up a long (2-3 mile) pretty good grade about 80degrees out and the temps displayed on the edge on my truck went to 225 degrees engine and 215 for the tranny. Air not on windows down. Temps seemed high to me but I never watched them before I put the fans on. I think I will watch the temps. Hate to do it but may have to buy another clutch unit and stick the stock fan setup back on

ill buy them if you wanna go back to a stock clutch type :D

whats the link to this ridiculously expensive fan damn ho fan?

Where are you takeing your measurements from?? Is that open air or in the front of the stack?

i use to have a thunderbird, i asked those guys if anyone had gotten a reading from a single stock fan, i may ask around on some of the 4.6 forums also, same sized fan but i think it pulled more air, that sucker worked brilliant on my Tbirds i had

I so wonder how these fans will do on my LB7 here in Hotter Then Hell Texas???
I have read in the past that if you have A/C on that these fans run 100%, meaning both fans on full blast. I wonder if your truck would have run cooler even though you would have A/C on? Could you go try that and report back to us?:D I have never seen my oem dash coolant guage higher then 195-200 and my tranny temps highwer then 170. I wonder how far if any these guages are off?


I will be towing to the races often and will keep you updated. I am going to adjust my fans to come on around 185 which means they will be at full at 195 I may have to play around a little to see if lowering the temp for the fans to kick on makes a difference or maybe even hardwire a direct switch to put them on high when I hit a big climb.

a switch would probably be a good idea, just to ground them on when you need them

Where are you takeing your measurements from?? Is that open air or in the front of the stack?


thats what there factory rated at look it up 4500 cfm per fan 2 are 9000 cfm that should be mounted at the rear of radiator like on the fords

AAAhhh ricer math :D

4500 and 4500 is not 9000, it's more like 4500 all the way accross and that would be in open air too, not with resistance. With as much resistance our stacks have, you can just about cut that number in half when actually measureing from the front of the stack. So you can guess-a-mate around 2000-3000cfm at any given spot across the front of the stack.

Not bad for some simple electrics and the price is really where it's at. As a matter of fact, I'm going to be using one of those same fans on my wheel'n Jeep........I'll take a airflow measurement when I get the fan and post the numbers. then we will realy know. ;)

AAAhhh ricer math :D

4500 and 4500 is not 9000, it's more like 4500 all the way accross and that would be in open air too, not with resistance. With as much resistance our stacks have, you can just about cut that number in half when actually measureing from the front of the stack. So you can guess-a-mate around 2000-3000cfm at any given spot across the front of the stack.

Not bad for some simple electrics and the price is really where it's at. As a matter of fact, I'm going to be using one of those same fans on my wheel'n Jeep........I'll take a airflow measurement when I get the fan and post the numbers. then we will realy know. ;)


there was post about someone who had swapped to 2 3.8 fans on the board here digg it up there the most powerful e-fan you can get. also why would it be 4500 all the way across. if thats the case why would you need 2 of them? one and a shroud would accomplish the same feat as 2 according to that logic.

http://www.dieselplace.com/forum/showthread.php?t=285618&page=6&highlight=ford+electric+fans


looks like there good at 12k

but hey its not my pocketbook so buy whatever

also why would it be 4500 all the way across. if thats the case why would you need 2 of them? one and a shroud would accomplish the same feat as 2 according to that logic.


No, because there is too much surface area for one fan to cover. One fan of that size can't handle twice it's surface area like that. You'll loose flow like crazy trying to pull air through one big schroud. That's why you add the second fan side by side, now you have that same amout of flow all the way accross the given surface area. It like when it's hot outside and you are standing in front of a fan. If you stand directly in front of the fan you get a lot of air, if you stand to the side you get a little less air, then if you stand even further over, you get no air. You are outside of the given area where there is no airflow. If you put 2 fans side by side, you now have that airflow over a wider range, but it's not twice the airflow in any given area, it's the same airflow just more spread out.

A simple flow test in front of the stack would easily set the numbers straight. I have nothing against the Taurus fans, I just think the numbers are speculative since no one has actually tested them. Even TxC summed it up here fairly well (in that same thread), and that's just by doing some simple math and knowledge of how these fans work: http://www.dieselplace.com/forum/showpost.php?p=3065658&postcount=43

those 3.8 fans were not exclusive to the 3.8s, i believe they came factory on alot of 4.6 cars to, at least from dealing with thunder birds that would be my assumption

and you both have no proof of either theory working, the problem with theorizing, is just that, its theories and speculation, till somebody puts two fans together on a shroud, and measures a CFM reading you both have no true way to prove witch one of you is right

rttoys your theory does make sense, but like i said above, no proof, sometimes things turn out unlike the way people expect, its happens, its the real world

so anyone have the capability to test them? i sure don't, but i could dig two 3.8 fans up somewhere

and you both have no proof of either theory working, the problem with theorizing, is just that, its theories and speculation, till somebody puts two fans together on a shroud, and measures a CFM reading you both have no true way to prove witch one of you is right

rttoys your theory does make sense, but like i said above, no proof, sometimes things turn out unlike the way people expect, its happens, its the real world



You have to remember, when dealing with electric fans and the space given in our vehicles, it becomes a lagistics thing. Yes, you can have one big electric fan in the middle that pulls 10,000+cfm completely through the stack, BUT we don't have the space for a motor that size or the electrical system capable of powering it (we won't even get into cost ;) ). So to make it even close (size and power wise), we divide it up and use 2 smaller fans that completely cover the entire area. Now, from what I've seen and measured, we are still very shy of hiting that 10,000+cfm mark through the stack with electrics, it can only be done with a clutch fan driven off the engine. so you take what you can get and use your truck accordingly. Some will be able to tow more, some less, it all depends on your particular circumstances.

I have proof on airflow, just not with the Taurus fans. That's why I was asking where the numbers came from on the Taurus fans. From what I've seen and heard, they seem pretty bad ass, but I would still like to see some hard numbers on them, because I think they have been blown out of proportion. I've delt with a lot of electric fans in my life and I can tell you TxC's Max fans are the strongest I've ever heard, seen or measured. If i remember right he told me they run around 7-8000cfm freeflow (measured). When measured up against the stack, that's where we got the numbers of 4-4500 at any given area in front of the stack. TxC and I did airflow measurements accross the stack using his Fan Damn Max fans vs the stock clutch fan, here's the thread from his website: http://www.dieselspot.com/forums/showthread.php?t=1281 We also measured a Jeep Cherokee electric fan and some other electric fan i had here, it's amazing to see the difference. Numbers don't lie.

TxC has the measuring equiptment and the taurus fan is an exact match for my wheel'n CJ5, so I'm going to find one and measure it myself. I'll even put it in my truck just to take a measurement in front of the stack, if ya'll really want me to. It doesn't change anything, if it's working for you, then that's fine, roll with it. :)

well you could run a pusher fan in front and a puller in back and sandwich it if need be