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First Gen electric fan set-up NEW Pics 1-25-09

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RICK212

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I want to install an electric fan on my small block 4x4 '72 Blazer. It's a street truck with very little wheelin'.

I'd like to see pics of any first gen's with electric fans to see how they are installed. Did you use the shroud? Did you use salvaged fans or purchased aftermarket fans? How did you power the fans?

Thanks...Rick
 
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I used windstar fans and a peice of angle iron on top and bottom to attach to rad support. Pics in my build thread link in my sig
 
Nice....!!!!! What year Windstar will work or are they all the same?

Loved your full roll cage. Any problems puting the soft top down? I have the same top and was wanting a full cage just like yours. Did you fab it yourself?

Thanks...Rick
 
yeah I built it myself, I have a jd2 bender. I designed the cage so it could be sat back in the convertible position but I don't like the way the cage is to do that and I never run the top like that, its either on or I take it off completely. I'm gonna cut the back half of the cage on next summer and redo it. As for the fans I think they are mid 90s ford windstar minivan, there are a few writeup on them on here and pirate. From what I have heard for a junkyard fan either get the windstars which fin the chevy radiators well or ford taurus 3.0 (I think) sho fan.
 
Using a shroud works, drawing air over the entire radiator surface is going to get you the best cooling results.

If you don't do an elec. fan, the next best thing is a clutch fan and ditch the flex fan idea all together.

dcp_4571elecfan.jpg
 
I browsed the net and found info about both '90-'95 3.8 Taurus and '97-'98 Mark VIII electric fans. My inner diameter of my Blazer's shroud is 19". Both F*rd fans are 18.5" and will fit right inside of my shroud. Is that what vtblazer did?

The F*rd guys were saying that the Mark VIII fan had the same motor, but a better fan blade design. I'm going to my local parts store and buy a new one instead of risking my time and effort on a used one.

I'll post pics of my project as I do it. I need to figure out how to wire up the fan. Any ideas??

Thanks...Rick
 
you can get fan controllers from summit racing and such so it kicks on at preset temperatures. I have mine running through a 100A 100% duty cycle relay and ran off a toggle switch on my dash. I have a controller to install sometime later but will still use the large relay. I also like having the option to turn off if needed manually.
 
What ever you do, make sure you have circuit protection that is correct for the wire size your using.

14 guage wire needs a 15amp breaker
12 guage wire needs a 20amp breaker...etc.
 
Nice fab job!!! It looks like you took your time and paid attention to the details.

Rick
 
It wasn't hard at all and no fancy tools needed. Or the windstar option is all done for you if you don't have the time.
 
How's the noise level with that twin fan set up?

Do they both come on at the same time?
Manual or auto off a t-stat switch?

Nice work, looks excellent.

attachment.php
 
Thanks, they have worked great so far.

I can't hear them on the freeway or when there's any road or tire noise, but I can hear them come on when idleing. They sound similar to a modern car when the fans kick on. I little more noise than the electric fuel pump.

They are both hooked up to a thermostat switch in the manifold. I have them both coming on at the same time now, but I have a wire connector on one to allow me to disconnect it if needed (I was worried about amp draw).

They also bolt onto the 4 factory mounting holes on the core support.
 
I wired mine as a two speed, used a on/off/on toggle.

On low you can't hearit and it only draws 4 amps but on high it really cranks and probably sounds similar to both of yours running, draws a total of 10 amps on high.

12 guage stranded wire running to two seperate relays with 20 amp inline automatic breakers.

The wires running to the toggle have such low amperage on em, they won't even read. :p:
 
I actually would like to find a way to make them two speed. They are really overkill when they both come on. Are the fans two speed or did you find a way to limit the current they get?
 
Built it by using an old school ignition resistor.

Knocks it down to around 4/5 volts going through the resistor.

dcp_4238fanwiring.jpg
 
:thinking: So you don't have them controlled by thermostat switch? I like how the thermo switch lets me forget about all that, but I suppose I could install a second one that kicks on only when and if the temps get high enough to need full speed operation. That might help keep the amp draw down on days where I need the lights, heater, and stereo all at once. Nice idea, thanks!

Edit: Do you remember the Ohm rating or have a part number?
 
It's a stock points style resistor for our year trucks, most auto parts stores still keep em in stock.

I have had to replace one but that's been over a two year time period, so now I just keep one in the tool box.
 
I just picked up a Mark VIII fan and ordered a control unit from DC Controls. Once they get in, I'll pull the truck inside and begin documenting my custom install.

My wife will be happy...no more having the cats getting cozy inside the shroud. Last time, Meow-Meow did not make it and I had to get her unstuck from the belts. Not a pretty sight.:(

Rick
 
bp71k5 said:
It wasn't hard at all and no fancy tools needed. Or the windstar option is all done for you if you don't have the time.
Click to expand...

Brian...that shroud is really nice. I forgot you had done that. Makes me wanna make one too. :waytogo:
 
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