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Unread 03-21-2007, 10:17 AM   #16
JeeperDon
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If you feel your 2.5L is less than you want, swap in a bigger motor. Pretty much nothing you can do to a 2.5 will be worth it. I even added a cam to mine, along with Borla header, clean air system, elec fan, etc. Nothing made a difference I didn't have to convince myself I felt.

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Unread 03-21-2007, 10:52 AM   #17
SEZARO21
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I did the swap with a Taurus Fan. Very easy to do. I have it wired so that I can choose which speed I would like on and I can turn it off all together as well. I did this swap only for water crossings. If you're doing this swap expecting power gains, DON'T do it. There is no power gains.
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Unread 03-21-2007, 11:53 AM   #18
vadslram
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What did I do different?
does a 4.2 have that different a curve?
I definitely noticed a dif in power when I switched to electric and the idle went up about 100 rpm.
I did start with a lincoln fan but it wouldn't fit. I ended up with a 12" fan from Pep Girls. I got the temp switch/relay from quadratec or summit racing..I forget which.
Total cost of switch over $150 but that includes a big ***** linc fan that is still sitting on the floor of my garage.
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Unread 03-21-2007, 05:47 PM   #19
Tshark299
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Quote:
Originally Posted by Jeepfreak81
You don't have a wiring diagram on how to do this do you?? I have overheated twice because I bumped/.turned off the switch and didn't double check it.
I was afraid of doing the same thing, so I wired mine such that if the sensor gets hot enough and tells the relay to send power to the fan, but the override switch is off, the power is instead routed to a bulb I put behind my unused "Check Engine" light. I did this 2.5 years ago so I can't remember exactly how I wired it, but I believe i used a second relay used only to divert the power one way or another. I'm driving my XJ at the moment so I can't go look at it.... but I'll think about it more and see if I can't draw something up.
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Unread 03-21-2007, 05:49 PM   #20
Tshark299
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What are you guys using for temperature sensors?
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Unread 03-21-2007, 08:12 PM   #21
Mr.B
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Quote:
Originally Posted by Jeepfreak81
You don't have a wiring diagram on how to do this do you?? I have overheated twice because I bumped/.turned off the switch and didn't double check it.
I was going to do a write up on it, but I haven't found the time. Here's my diagram.

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Unread 03-21-2007, 08:26 PM   #22
ckiel24
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Quote:
Originally Posted by JeeperDon
If you feel your 2.5L is less than you want, swap in a bigger motor. Pretty much nothing you can do to a 2.5 will be worth it. I even added a cam to mine, along with Borla header, clean air system, elec fan, etc. Nothing made a difference I didn't have to convince myself I felt.
Im with don... You should be able to pick up a wrecked cherokee for under $1000 and have all the parts you need to swap in a 4.0 plus have a cherokee to part out that you could probably make your money back with. All you would have to do is fab up some brakets or buy some that are pre fabed and have some one weld them in for ya. On the other hand... That is an awsome diagram Mr.B!
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Unread 03-21-2007, 08:42 PM   #23
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Quote:
Originally Posted by ckiel24
...On the other hand... That is an awsome diagram Mr.B!
Thanks.
I look at it differently. The 2.5 is what I have. There are alot of other things that I need to spend what little money I have on. So whatever I can do to get just 5 MPH...
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Quote:
Originally Posted by Major Sanderson
You have no respect for excessive authority or obsolete traditions. You're dangerous and depraved, and you ought to be taken outside and shot!
Quote:
Originally Posted by Beefstew
I may have proven that I am in fact an idiot, by all of your standards...
Quote:
Originally Posted by ritjobbie View Post
Mr.B's post gets you as close to Buddha as you can get on JF...
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Unread 03-21-2007, 09:26 PM   #24
ckiel24
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True... But also wouldnt it make more since to get some different gears rather then spent the money on the electric fan? I know the gears are more $$$ and dont give you any extra HP but would they make a bigger difference?
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Unread 03-22-2007, 11:09 AM   #25
vadslram
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This is the one I used.
Came with everything but the fan and 12 volts.
http://store.summitracing.com/partde...5&autoview=sku

It has a second lead for an over ride (they say for A/C) that you can hook up to a switch for manual on. I don't know why I would want it off with the engine temp above 180
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Unread 03-22-2007, 08:32 PM   #26
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Quote:
Originally Posted by Tshark299
What are you guys using for temperature sensors?
I bought a Torqflo #733653 from autozone. It cost me about $18. I know it's cheap, but it is adjustable. I have it set to start the fan at about 195*, and when the radiator gets down to around 145*, it shuts off. There are better ones out there. I think mine is made by Flexa-a-lite and repackaged. It's been working great so far. I couldn't find much on the internet about it, except this Nissan forum that someone else used one.
http://nissan4wheelers.com/eve/forum...31#14610527331
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Everyone is Welcome
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Quote:
Originally Posted by Major Sanderson
You have no respect for excessive authority or obsolete traditions. You're dangerous and depraved, and you ought to be taken outside and shot!
Quote:
Originally Posted by Beefstew
I may have proven that I am in fact an idiot, by all of your standards...
Quote:
Originally Posted by ritjobbie View Post
Mr.B's post gets you as close to Buddha as you can get on JF...
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Unread 08-09-2010, 06:34 PM   #27
pickleman
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i have everything i need to wire up my fan but i can't find any spot to put my temp sensor to make everyhting work, does anybody know where i can put it on a 2.5l 93yj ? thanks
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Unread 08-09-2010, 07:40 PM   #28
laybackman
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I went with a Zirgo fan and their kit to make it work automatically. But the 16" 3300CFM fan kit is rather expensive now but it is a sweet fan. It looks just like the fan in my '01 GC which is just about the same size and would be much cheaper. You could use the Zirgo kit to make it automatic.

One very important tip! If you use the probe in the upper radiator hose you will need to use a little Permatex to help seal the hose back up. That is because the copper wire that is attached to the probe makes a good seal very hard to accomplish. What I did was make a small groove on the inside of my upper radiator hose with a hack saw blade whee that copper line would lay. Then with the Permatex coating it works just fine.

To make the 'brackets for the Zirgo fan I used doubled up strips of sheet metal and used self tapping screws to hold the sheet metal in place. Then I attached the faqn to those doubled up strips.

Here is what I did:

http://home.comcast.net/~laybackman/Zirgo/Zirgo.htm
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Unread 08-09-2010, 07:48 PM   #29
Mr.B
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Quote:
Originally Posted by pickleman View Post
i have everything i need to wire up my fan but i can't find any spot to put my temp sensor to make everyhting work, does anybody know where i can put it on a 2.5l 93yj ? thanks
I read somewhere here recently, that someone cut up another radiator hose, and wrapped the probe in it around the real radiator hose. I hope that makes sense. I'm not sure how it's working for him though.
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White '94 YJ 2.5L 5 speed, 35" BFGs KM2's, 5" lift, Mark VII 2 speed fan, Milemarker PE8000, Front Aussie Locker, Power steering conversion, '98 Cavalier seats, MORE Boomerangs in front, 136 amp ZJ alternator, JB conversions SYE, Tom Woods custom drive shaft, 8.8 with ARB, 4.88 gear ratio, Teralow

My Jeep

'89 XJ Laredo Bone Stock

Member:The Wrecking Crew

Ham license:
KB6(tooeasytosearch)

Everyone is Welcome
www.rubiconramblers.com

Quote:
Originally Posted by Major Sanderson
You have no respect for excessive authority or obsolete traditions. You're dangerous and depraved, and you ought to be taken outside and shot!
Quote:
Originally Posted by Beefstew
I may have proven that I am in fact an idiot, by all of your standards...
Quote:
Originally Posted by ritjobbie View Post
Mr.B's post gets you as close to Buddha as you can get on JF...
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Unread 08-09-2010, 07:50 PM   #30
trucknut
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Hey whats wrong with the power of the old faithful 2.5L??? Every time I am on the highway I am always at the front of a very long line!!!

I added an electric fan to mine, not to gain power but to get a little extra cooling at low speeds and when plowing. Used a pusher fan in front of the rad controlled by a toggle switch on the dash.
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