Electric Fan cooling

I have been thinking it might be a good idea to add a electric fan to my jeep for when i'm back in the woods wheeling. I have a 2brrl carb on my jeep now and have noticed it running a little hotter when at a stop light. (not too hot) but it cools down once on the move again. I'm pretty confident on the mixture with the two 2brrl, I have looked at the spark plugs multiple times to read how its running. 

I run an electric fan, dual electric fans rather, on my MB with a datsun ( wide short ) radiator. The electric fans come off a Chrysler New Yorker if I remember right...

brandon219 wrote: shrom2a wrote: I have been thinking it might be a good idea to add a electric fan to my jeep for when i'm back in the woods wheeling. I have a 2brrl carb on my jeep now and have noticed it running a little hotter when at a stop light. (not too hot) but it cools down once on the move again. I'm pretty confident on the mixture with the two 2brrl, I have looked at the spark plugs multiple times to read how its running.  Has anyone on here added one? What brand/size did you use? is it easy to install? seems pretty simple to me. I bought a Derale 1450cfm from summit.... It slide into the shroud and onto radiator like it was meant for it. You could not get anything bigger in there, I mean slide in. I have no issues. I can post part number if you cant find it

Did you guys have the fan addition to the original fan blade on the engine? or do you take that off and just run the electric?

Electric only, Summit RAcing part number DER-16514.. These are old pics ive had on here for a bit, when i said this fan just barely slid in i meant BARELY!!! Didnt need to force it in, slid in


    The only thing i will say is, i had to move my radiator over to pass side about 3 inches for the steering conversion.. If the radiator is in original location, since the fan is a pull type fan it sits behind radiator (of course) but it will be a real tight fit between rad. and water pump. This fan was also the skinniest one i found

Actually the fan i posted is interchangeable push/pull...  You hear fan only at idle really, the noise isn't enough to say so.. The advantage to putting a push fan outside of radiator is that you could run a bigger fan opposed to sliding a pull fan behind rad. Only disadvantages are that 1. you see the fan, which who cares i guess.... 2. Would be that its liable to get damaged from debris, that's what i'd be worried about if you do any wheeling. Or get a grill screen to protect it

Thanks guys this has been a big help. I think I'm going to go with the pull fan replacing the mechanical one. I like the idea of it being in the engine compartment over being seen through the grill.

Metcalf wrote: Flat fenders tend to have a lot of cooling issues because the engine compartments are so tight.  A great test for cooling capacity is to drive around with the hood off. If that gets rid of your cooling problems generally it means you have a problem getting the hot air off the radiator back OUT of the engine compartment. It doesn't matter if you have a super huge fan if you can't get the air out. You will see a lot of old school V8 flat fenders with louvered hood, minimal inner fenders, cowl vents, the rear of the hood raised, etc.... A fan needs a shroud, period. It doesn't matter if its electric or mechanical. You are not using your fan to its potential unless you have a shroud.

Daniel_Buck wrote: Brandon, how exactly does the fan mount?  In the photos you posted, I don't really see how it's mounted.  Does it just use the mounts that come with the fan (just drill a few holes through the shroud?)  I can probably figure out something, but just curious how you mounted it :) Do you have it on 100% of the time, with the ignition?  Or do you have it on a temperature switch? Out of curiosity, is there any reason NOT to ditch the mechanical fan and go for an electric fan?  Seems like having an electric fan might free up a bit of spinning weight from the engine, which is probably good?   I went driving in the mountains today, and it was warmer out there than right by the coast.  I noticed the engine temperatures getting quite a bit hotter than normal while going up hill (about 2,000rpm in 2nd gear).  I think if I were to have this thing offroad in the desert going real slow, there would probably be some overheating situations.  Want to try and do something about it now, before I start taking it offroad a bit. Think raising the back fo the hood 1/4" would do anything?  Or would it need to be something even higher than that to really move any heat out?

Hi Dan,

   Yes the fan is mounted with hardware that comes with the fan, they look like zip ties, the head of it is circular,with a square foam pad and a retainer that goes on outer side of radiator that attaches it, just slide them in between the fins on radiator. I have it on an adjustable fan switch then i also have a designated switch on dash to override if I'm going into a water crossing i can shut the fan off, so water doesn't get sprayed everywhere. As far as removing the mechanical fan, rule of thumb with any other motor is that it frees up a few ponies, so why not these engines? Less rotating drag= a few h.p... I'm not gonna put my head on a chopping block and say how much is gained, but something! I've heard of people raising the hood,,,, but i don't think it looks right. What thermostat you running?? I also put in a bottle of lucas super coolant (buy at advanced auto, autozone, or similar type store) it helped lower like 5-6 degrees! Here are a few more pics i just took. I highlighted where the mounting straps go through the radiator, hope it helps!!




   Obviously this is from looking through the grill from front.





Edited by brandon219 - 06 Aug. 2012 at 2:17pm