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Old 06-27-2010, 11:47 AM   #31
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this is my setup,

the fan def helped my power and mpg, after a fresh oil change and filter ive hit 17mpg several times. on 33s and 3.73 gears. the biggest issue ive had is the controller failing. the probe style controllers seem to fail after a few offroad trips and i had to hot wire it on the trail using my fuse as the switch. now i just run it off a switch and have an additional gauge to remind me to turn it on. (my jeep isnt a daily driver). any pics of your setup???

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Old 06-27-2010, 02:51 PM   #32
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there is always a debate on whether you need a shroud or not...

I think 99% of the front wheel drive cars I saw in the pull a part have a shroud around their electric fan(s), but that also increases the depth of the unit

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Old 06-27-2010, 11:50 PM   #33
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the shroud is extremely important with low speed crawling. if your on the freeway it really doesnt need it, but when your at low speed its a nessecity
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Old 06-28-2010, 12:22 AM   #34
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I ordered a Radlock Gold plated....I mean Aluminum radiator from Novak Conversions that I hope to have tomorrow to go in my YJ with an AMC V8. I have the same fan setup. I bought a V8 conversion radiator from a company online called EXTREME Radiator.com and it was identical to the stock 6 cyl. radiator I pulled out to replace except the crusted up stock radiator cooled better. I am considering cutting some vents in the hood over the manifold to let some heat out of the engine compartment. I have a couple grill screens from two CJ's I parted out that I may cut up to fab up the vents. Even when the Jeep runs normal temp the Edlebrock carb will wreak of gas when the engine is cut off and it sets and soaks up the heat. I haven't noticed a difference in power with the electric fan but my gas mileage has gone from 8 to 9 MPG!
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Old 06-28-2010, 07:41 AM   #35
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When adding the new electric fan, do you scrap the factory fan shroud ?
If yes, how/where do you mount the power steering pump resevoir ?
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Old 06-28-2010, 01:29 PM   #36
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Im thinking about going the electric route so thanks for all the info. I've noticed that some vehicles have the fan mounted on the outside of the radiator and some on the inside.
What is the difference if any other than possible space limitations?
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Old 06-28-2010, 01:44 PM   #37
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Im thinking about going the electric route so thanks for all the info. I've noticed that some vehicles have the fan mounted on the outside of the radiator and some on the inside.
What is the difference if any other than possible space limitations?
Mount it behind the radiator when ever possible. mounting it in front puts it at increased likely hood of being destroyed.

I'm strongly considering doing this to my 4.0

E fans are FANtastic (I know that was awful)

anywho, there is no water here, so water crossing=mute point
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Old 06-28-2010, 07:06 PM   #38
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I got good results from my fan this weekend on my over 400 mile trip, gunna post results soon, just recovering from driving so much and working 10 hours today. Got some great fireworks in Nevada!
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Old 06-28-2010, 07:56 PM   #39
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I've been shopping this mod, as well.
I notice that there are pusher fans (mount in front of the radiator). And puller fans (mount between the radiator and the engine). I also see that there are single fans (like the image on page 1) and dual fans.
I think I'm inclined to try to dual fan kit. Same principal and the single, but you have a margninal redundancy of a second fan in the event of a failure in the first fan motor,
With mechanical fans, if the clutch fails you still have cooling.
With Electrical fans, if the motor fails, you will notice when the temp gauge is telling you to turn right....or when your Jeep starts doing its impression of a steam locomotive.
When my piggy banks recovers from my other recent investments into "TJ" I'll definately give this a shot and until then....I eager await hearing of your perfomance findings.
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Old 06-29-2010, 11:59 AM   #40
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Another great idea...down in flames.

There isnt enough real estate for me to mount a dual fan....the TJ radiator simply isnt big enough and I cant find a dual fan small enough.

So... I'll go with a big single electric fan.... just like everyone was discussing.... From the beginning.

Still learning....
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Old 06-30-2010, 01:57 AM   #41
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I've been shopping this mod, as well.
I notice that there are pusher fans (mount in front of the radiator). And puller fans (mount between the radiator and the engine). I also see that there are single fans (like the image on page 1) and dual fans.
I think I'm inclined to try to dual fan kit. Same principal and the single, but you have a margninal redundancy of a second fan in the event of a failure in the first fan motor,
With mechanical fans, if the clutch fails you still have cooling.
With Electrical fans, if the motor fails, you will notice when the temp gauge is telling you to turn right....or when your Jeep starts doing its impression of a steam locomotive.
When my piggy banks recovers from my other recent investments into "TJ" I'll definately give this a shot and until then....I eager await hearing of your perfomance findings.
I'm getting to it guys, had stomach pain very bad for 2 days now, hopefully tomorrow ill feel well enough to go get the info
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Old 07-02-2010, 02:55 PM   #42
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Feeling better? what happened w/the results?
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Old 07-02-2010, 06:04 PM   #43
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When adding the new electric fan, do you scrap the factory fan shroud ?
If yes, how/where do you mount the power steering pump resevoir ?
yes, scrap the shround, there is no need for it. The flex-a-lite kit has an option to buy a mounting piece for the reservoirs...added like $20.

...or you could just secure them to the metal rods that position the grill... not pretty, but it would work.
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Old 07-02-2010, 06:07 PM   #44
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the shroud is extremely important with low speed crawling. if your on the freeway it really doesnt need it, but when your at low speed its a nessecity
I guess you meant with mechanical fans? The electric fan covers nearly the entire radiator and mounts up against it with a rubber seal. It pulls air directly through the radiator. Even when idling/at low speeds, the electric fan is so efficient that it hardly runs. In my opinion and from the setup in jeeps, the shroud is only used because the fan is so far away from the radiator.
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Old 07-02-2010, 09:12 PM   #45
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depends on the elctrical fan your buying. most dont come with seals and the size to cover most of the radiator. I bought some ebay specials in the past that sucked.
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Old 07-03-2010, 05:09 PM   #46
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E Fan

Has anyone tried the new Jeep TJ fan from Derale?

Derale Performance Electric Fan Kit for 1987-2006 Jeep Wrangler - 2,400 CFM Derale D20161
I know their trans coolers are great.

Mike
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Old 07-03-2010, 05:31 PM   #47
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Never heard of Derale. It is more expensive than the flex-a-lite setup. I am waiting to see if this is the next Jeep mod or not for me. If it is, I will stick with the well known components, but that is just me.
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Old 07-05-2010, 01:54 AM   #48
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16.5 mpg on the trip. 600 miles. I just started my first full tank test in town, things look promising, and i'm kinda driving shitty because I have a lil more power now and its so much fun. Just had a great 4th, I'd like to thank the Indians in Nevada for making it possible! Sorry for the late results
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Old 07-05-2010, 09:49 AM   #49
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So is 16.5 higher or lower than you usually get? Was this 80mph driving or 65 mph driving? I am interested in the round town driving.
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Old 07-05-2010, 02:11 PM   #50
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ok, so a little more info on the trip. I don't think there is anyway to tell if this milage was better, worse, or the same, because the conditions were not controllable at all! First we drove 2 hours, and climbed over 5000 feet, often flooring it in 2nd gear up large hills. Then we drove around town some, then drove 80 mph through the desert up and down medium hills, rarely flooring it. Then back from the desert, then driving round reno. I didn't count my mileage on the way back but I think it was around 18mpg.
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Old 07-10-2010, 08:49 AM   #51
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Thanks tobycat1. Let us know what you find in your city driving.
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Old 07-10-2010, 03:11 PM   #52
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I will, might be hitting empty today so more results if I do
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Old 07-23-2010, 10:23 PM   #53
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Life has been very busy, lots of trips to Reno where I am moving for school. Got some stats for ya

Ok, 2 full city tanks in.

425 miles, 26.25 Gallons of regular unleaded gas =

16.2 MPG

This is still a 2.45 MPG increase over my average. I think these results are conclusive, but will continue to test. Hope this will encourage you all to try this out.
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Old 07-24-2010, 12:52 AM   #54
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I guess I found my next mod. Now I just need to pick the brand and decide if I need a shroud or not.
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Old 07-24-2010, 02:12 AM   #55
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I guess I found my next mod. Now I just need to pick the brand and decide if I need a shroud or not.
Its always safer to have a shroud wether you need it or not, nobody wants to loose a finger
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Old 07-24-2010, 02:16 AM   #56
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GOOD POINT i have 4 boysl
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Old 07-24-2010, 02:18 AM   #57
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just saying cause I've found myself putting my hand down and accidently hitting the shroud while trying to reach the back on the engine to find those pesky vacuum leaks
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Old 07-24-2010, 02:47 AM   #58
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These are a few things that I have found when running electric fan set ups.
I have run four different fan/radiator set ups in my YJ.

The horsepower gains that most companies claim are for the most part bogus. The fan can save a couple of HP but rarely what they claim.
The fan set up works best in the puller set up mounted on the motor side pulling air through the radiator.
If you have a stock radiator I have found it works best with a shroud. If your running an aluminum or a radiator that is more efficient than stock you can get by without a shroud if the fan covers enough radiator surface to cool the engine and has enough CFM.
I found that when running an electric fan with a shroud they don't seem to cool as well at highway speeds but they cool better in stop and go traffic or wheeling at low speeds.
Without the shroud they cool better on the highway but not as well in town or wheeling at low speeds.
If you will be crossing water or submering the fan you will need to have a manual switch to cut it off before crossing or submerging the fan.
Its hard to beat a good factory set up when you have a properly functioning clutch fan. I would not have changed my fan set up if I had not put a different motor in my Jeep. I only changed mine because the fan would not line up with the radiator and shroud.
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Old 07-25-2010, 03:36 AM   #59
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The fan set up works best in the puller set up mounted on the motor side pulling air through the radiator.
If you have a stock radiator I have found it works best with a shroud. If your running an aluminum or a radiator that is more efficient than stock you can get by without a shroud if the fan covers enough radiator surface to cool the engine and has enough CFM.
I found that when running an electric fan with a shroud they don't seem to cool as well at highway speeds but they cool better in stop and go traffic or wheeling at low speeds.
Without the shroud they cool better on the highway but not as well in town or wheeling at low speeds.
If you will be crossing water or submering the fan you will need to have a manual switch to cut it off before crossing or submerging the fan.
I have found these parts to be fairly similar for me, although I think that with a 2.5L engine the HP gain is significant. If my engine was say a 4.6L stroker or 5.7L v8 I doubt I would even feel it, but 2.5L engines are bogged down by even the smallest thing, like the mechanical fan.
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Old 07-25-2010, 03:41 AM   #60
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BTW, don't worry if your engine runs 5 degrees or so warmer on the freeway at full speed. Mine does now with the electric fan. I think it mainly has to do with constantly running my engine at over 3000 rpm on the freeway do to my gearing. Usually with my mechanical fan I'm sure it would usually be spinning like crazy draining my mileage and cooling the radiator down more than air flow alone can do, resulting in a cooler engine. The electric on the other hand cools the radiator only when its above the set temp, so it has yet to run when I am driving at full speed on the freeway.

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