what do electric fans actually do for your truck performance wise, and if i end up getting some used off of a car is there any mods i will have to do, or anyother parts i will need to buy? also what type of cars could i get these electric fans off of ?

 

Electric fans eliminates the load on the engine that is created by the regular fan. As for what type of fan to buy, I know Flex-a-lite makes electric fans for silverado truck. The car that has the electric fans you need is the LS1 camaro. I do know Nelson Performance sells a plug-n-play hareness for both types of fans.

 

I think the benefit of electric fans comes from the fact that they don't always have to run. Yes, the fan clutch does jsut about the same thing. I have them, so I'm not trying to dog them, but I find it hard to believe that converting mechanical energy to electrical and then electrical back to mechanical is more efficient than just using a simple mechanical connection (belt). Then new load on the engine has to go somewhere, and its now in the alternator. My main reason to convert was that the fan clutch was sooo loud on these trucks. Now, when my fans are on low with the nelson harness, you cant even hear them.

 

Plus running electric fans helps clean up the engine bay by getting rid of the ugly a$$ fan shroud.

 

Exhappen put your clutch fan back on and run it in hot weather where it engaged then take it off and put the e-fans on and run it I guarantee you will notice a difference. The load put on the alternater isnt nearly as much drag as the clutch fan and assembly when it is engaged. You can get the e-fans off of any 98 and up camaro or trans-am. I would recommend the harness from Nelson Performance it is a quality piece and to my knowledge no one has ahd any problems with it.

 

Just got my harness in the mail and i was very impressed by it. I have the LS1 fans but have not installed them yet. I was surprised at the whole setup. There are actually relays and it looks factory with wire looms and everythng. It comes with detailed instructions about how to install. The only thing i need now is the time to install it in. It is like $90 plus shipping. Between the LS1 fans and that i think i dropped like $225. Which is way cheaper than a flexalite setup which will runn you like $399.99!!! EEEK!!!!

 

I just got my LT1 fans and Nelson harness on last week and I love not hearing(sounds like a damn airplane) that damn clutch fan and the loss of power when its 100 degrees outside and that clutch fan is dragging me down. The whole setup cost me around $150.

 

Another advantage of the elec fans IMO, is being able to more accurately control engine coolant temp if desired. My truck's coolant temps were consistent with the factory stat and fan clutch, but just a tick hotter than I wanted. By installing a 160* stat and having the PCM programmed to turn the fans on at 180* and off at 173*, I can now effectively have the truck running at 175* where I want it. Any electric fans that you install will require some form of control unit to turn them on and off, whether it be a manual switch, vsv, or PCM tuning. (of course they could be wired hot to run at all times, but I wouldn't recommend that in colder climates)

 

I have mine controlled by PCM(Nelson Harness) but also have a manual switch to turn both on when I want!

 

Does anyone know what GM fans fit the 1500 Avalache? I have the 34" radiator.
Thanks,
Damon