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Flex-A-Lite Fan (looking for input)

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It has a new haze at idle?

Load valve train noise

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Who has done the Flex-A-Lite fan conversion on their truck? Any problems with the install? Any real data on the claimed mileage increase? Any dyno data on the claimed power increase?
 
I doubt you'll see an MPG increase over a fan that hardly runs at all, at least that's the case with my '03. If you want more mileage, do the mods I have done.
 
If you tow heavy, be aware that the Flex-a-Lite mechanical fan will flatten out at high RPM, taking less horsepower but moving less air exactly when you need all the airflow you can get - towing a heavy load up a long, steep grade.



Rusty
 
Sorry, I should have specified I am talking about the electrical fan kit they have.



I had that set up on my 03 for a couple years. Worked perfectly until I went from towing a 14K trailer to towing a 18K trailer cross country (mountains).

As a matter of fact I have my flex a lite set up right here ready to make a sweet deal if you decide to go with them. I will tell you this, if you are towing heavy: GCVW or higher-dont get rid of your mechanical set up. Other wise it is your call. I was on my third fan clutch for my mechanical fan when I swapped over to flex a lite which was my main reason to run them. I do believe you will have some improvement in fuel milage but I really cant say what. My truck started out as one of my shop trucks and we pulled a lot of different trailers regularly and I never got very accurate records. As hard as my mechanical fan pulls down the motor between shifts when engaged I cant believe that doesnt have some impact.

Making the sales pitch here- if you want to save a few hundred bucks and go with electrics: PM me :D
 
They fans move less air than the OEM setup, and I have read about several folks running theirs on the dyno with no hp gains.

I wouldn't expect any mpg gains, my fan doesn't engage until over 215*, and in 55K miles it has only engaged once, so under 99% of driving the fan isn't a fuel robber.
 
I have had them on my truck since they came out, in the beginning the thermostat gave problems but they took care of it. I have manual over ride in my truck, that turns on fans in a emergency, AC works better. If you live in a winter climate, you will love them! Truck warms up quicker, and fans barely come on. I adjust start up time for winter so truck runs hotter.
Rick
 
They fans move less air than the OEM setup, and I have read about several folks running theirs on the dyno with no hp gains.



Yup. I tried the then-current twin Flex-a-Lite electric setup on my 1996 3500 V-10/47RE. It overheated on long grades when towing a 5th wheel as well as when towing in Houston summertime stop-and-go traffic. To add insult to injury, the 100 amp draw of the fans would pull the battery (only one on a V-10) down when idling for extended periods with the headlights on.



I went back to the mechanical fan. The electrics would probably work well for a mall cruiser, but I wouldn't recommend them for heavy towing in hot weather.



Rusty
 
I needed the cooling for towing but wanted electric fans so i went with 2 tarus fans from an 93 sho. They supposedly pull 2500 cfm on low and 4500 cfm on high. I used the grid relays (since i deleated them) and triggered the low side off the a/c and high off 190deg switch in head and an emergency switch in cab. Been runnin them for almost 2 years and all is good!
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I ran a Flex-a-lite on my old V8 Dodge and loved it for city driving and especially during the winter. However I would pull it off every summer and re install the stock one for towing my TT as it just didn't move enough air. Shadrach
 
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