I would think that two would be better, becuase of more surface area. But I guess it would depend on fan pitch, and rpm's mostly.
I'm for dual fans. I run one fan at all times when the ignition is turned on, and the second is either wired to the A/C compressor or a toggle switch for heavy traffic, drive-thru's, etc. I have a '94 GMC Jimmy with a 350 sbc, and I run dual 14" electric pushers on the outside of the radiator, wired as mentioned. My wife's '65 El Camino has one outside pushing, and the second inside pulling, because there isn't enough space. They overlap a little, but the second just takes a little load off the first one. -Josh
The cat's meow is dual fans with two stage control(one fan will kick on at lets say 185* and the other will kick on at 200* if needed), but the controller is a bit pricey. I too am going to use dual fans and my fans are out of a Chrysler Cirrus. It's pretty close to our radiator size and pretty easy to mount. I'm going to be using this one click me for a controller. Also has A/C input to wire to your A/C compressor coil, so when the compressor kicks on so do the fans, and it's adjustable. but it will turn on both fans instead of one.
I'll get a pic of it. yes, it's operated by a switch in the intake, on at 185*, off at 170*, it's a painless brand
Any chance you could post more info on this? I plan on running dual electric fans (the ones of the 1993+ Dodge Intrepid variety are better than aftermarket i hear) and would like to look more into that switch as my setup. Thanks
An OEM fan is generally better, reliability wise, than aftermarket. That's because they're built to run day in and day out. The, it makes me choke, Ford fans from Lincoln Mark 8's are awesome fans. They pull about 4500 cfm. That may be your best bet right now. And you can find them for about $50-$75 on ebay all the time.
ahh.. it's been awhile i've looked into it. they use variable speed now. like this one click me the other way to do 2 stage are with two kits for single fans with thermostats that kick on at different temps.
There is more to it than size. A smaller fan could conceivably pull more air than two large ones. Now, all other things being equal (speed, blades, etc), two small fans would likely cover more total area on the radiator than one large one - and thus draw more air. However, given all the variables, just find whatever fan(s) with the total CFM you want. A couple small ones might even be easier to fit.
camaro fans and a derale controller did this on my old truck works great and has 2 stages for ac on max or not
I'd go for duals, as stated above, they cover more surface area. I have dual Derale fans with adjustable t-stat control on the rad.
Electric Fans: most powerful single fan available anywhere is the 97-98 Lincoln Mk VIII, 4500+ cfm I use this fan on my GN. IT's THE BOMB! I wish I knew about this thing before I bought a flex-a-lite system for my 455. I'm not saying that my flex-a-lite doesn't work well either, it's just that the RF-64 fan is a mother-sucker! You can even feel the air going into the car, standing in front. I'd love to try one of these on a Buick V8 some day, and will post results. ElectraJim
At an idle, not very much. At speed I remember seeing a test that gave numbers in the 4000 cfm range.
Here are the fans on ebay that you'd want to look at: http://search.ebay.com/taurus-fan_W...sZ1QQsacatZQ2d1QQsaprchiZQQsaprcloZQQsbrsrtZd Not the Mustang fans, but the 9-blade Taurus/Mark 8 fans.
