That's a good read and all.......but I'm just skeptical that that $50 efan pulls as much air as the stock mechanical fan. When we replaced our fan clutch, we noticed at just off idle the mechanical fan was blowing way more than the stock efan. That doesn't sound very scientific I know, but I just don't have anything else to go by. The dukmiester said he read 4000 CFM somewhere, I'd just be skeptical with anything less.

 

4000 cfm sounds pretty high for one fan. Never seen one single that's that high..... You can get 2200 2400 cfm pullers that will definitely get the job done. Thing is dino lives in like Saudi Arabia. I have faith that if his set up cools it there it will work here. Anything in the 2000cfm range with good shrouding will do the job if the rest of your cooling system is in order. Oh I see that 4000 is both fans combined nor just the e fan... if you get two new e fans you'll have no.problem!!

 

I still think that dinky radiator is the issue, not the fans......but experimenting with fans is easier than experimenting with rads. On our other vehicles, including water cooled motorcycles, if I multiply height X width of the rad core and divide that number by the motor CID, I get 2+ square inches rad surface area per motor CI. With the XJ, u get 1.23 square inches rad surface area per CI. That very reason alone is why every component in the XJ cooling system absolutely must be in top notch condition, especially this time of year.

Man Law - no rusty, lumpy, cruddy looking stuff in the radiator, raise the hood once a week and check things out.

 

Agree! I think I got lucky!!

 

Sorry to jack this thread... but do you guys think this is a good upgrade? I mean that read about doing it seemed convincing but i want to know if anybody on here has done it with that much satisfaction???..

 

i have this upgrade on my XJ with two stock e-fans and i run really cool and never have an overheating problem also one fan is hooked to the ignition so it is automatic when i turn key and the other is hooked up to a switch and they both blow a lot of air

 

GOOD SET UP IMO....will work similar to stock. And dual electric fans is a great upgrade. You get more power, less wear and tear on the water pump, better mpg and if you bury an efan in the water you are much less likely to damage the radiator then with the mechanical

 

I dunno what mech fan they tested, but I can tell you mine with 4 different fan clutches pulls less than I think it should, period. I have had lots of elec fan setups on rangers/ B2's and I garuntee a black magic fan pulls more than the stock mech with a clutch.

 

Thought this was a good write up and a easy way to do the temp sensor without messing around with the CPU.


http://www.naxja.org/forum/showthread.php?t=1035194

 

http://www.dirtboundoffroad.com/feat...onversion-kit/
These are what I am going to run! I took my Mech fan off and put another condensor fan on and sitting at stop lights it only gets to about 215 but I want to up grade!!

 

Where's tjwalker....and his signature that says "without data, all u have is opinion"....or something like that. lol

 

What I've been curious about, with regard to efans, is any benefit of a rheostat?.....set the "fan on" at low speed (minimum load/shock to the motor/alternator), then dial the rheostat up when/as needed, bringing the fan speed up. Still gotta keep an eye on the temp gauge though.

 

That dirtboundoffroad looks like a well thought set-up.....not to mention 4000+ CFM.

 

DJB, there are fan controllers out there that are soft start, but you are gonna pay for 'em.

 

Yep, installed several Flex-A-Lite variable speed fan controllers (60% to 100% fan speed) and they work well. The rheostat was just a thought and wonder how it work with that triple fan set up. Even at 60% start-up, u can definitely hear/see the load on the motor/electrical system with big amp fan(s).