Electric Fans

ONLY for ADVANCED technical discussion about the 240sx!
Anand
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Alright. I got a pair of SPAL 11" fans... the guy said if I cut the connection from the existing fan and plug it in there, would that be fine???

here is what the guy said:If you're using this on an 240SX, simply remove theOEM fan, disconect the four-wire harness, cut the harness plug off from theOEM fan, and re-attach the harness plug to the dual fans. It's a two-stagesystem. The first fan kicks on at something like 188 degrees, the secondat 206 degrees, or so. Then attach the dual fans to the radiator. Youshouldn't need to purchase anything additional. It's plug and play. It'lltake you an hour, maximum.

is this ture????


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stretch240sx
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cant help you out... but maybe when you get it can you say how it goes?

YamaOni
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Ok, Do you have electric fans now? If its a fr car probably not right? Is your fan attached to the water pump pulley? If that's the case you will have to wire in a water temp sensor and hook up the fans to come on and shut off. You will also need to keep the belt to run the water pump. Can you give more info?

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Kinesthesia
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I thought all 240's with A/C had one electrical fan against the rad. I assume he's talking about the plug for that fan.

I could be mistaken.

Anand
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Kinesthesia wrote:I thought all 240's with A/C had one electrical fan against the rad. I assume he's talking about the plug for that fan.

I could be mistaken.


yea, I belive that is the plug that was spoken off.

now my question is.. would what this guy told me to do be right?

he told me that one fan will turn on at one point and then the other i think one around 80 deg and the other at like 1something...

I want to know if this is true or should I get a thermostat kit and wire the fans to that!?

Aries
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I would just get a thermostat kit.

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Mayhem_J30
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if you do the electrical fan I would get an accurate temp gauge and not use the one in your dash. it's very important to monitor that temp so you don't run hot

StanBo
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Aries wrote:I would just get a thermostat kit.


I am running dual FAL 12" fans & a Permacool adj temp controller.

I removed my clutch fan and my electric fan.

One fan takes over the clutch and the other takes the place of the A/C fan.

The A/C fan hot leg gets wired into the Permacool. It is a blue wire. The black gets spliced with all of the other grounds (1 from each fan a large one from the controller etc.)

The fans are great. Too bad my rad is broken and now I have to take them out to install the new rad, waterpump and thermostat.

The controller is $30 and is well worth it.

240canuck
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ok I got a question I got a 92 auto 240sx with no AC so i got no elctric fan all mechanical. would the easiest way to hook up an electric fan be to just wire it to a 12 volt source that turns on when your ignition is on? and leave it at that maybe 2 12" fans. will that be adequate? also how far from the rad should the fans be and do i need to use a the fan shroud also??

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Nismo1182
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I have 2 12" fans that turn on when the ignition is on. They are bolted to the raditor directly, no shroud. Hasnt overheated yet...

ZilverX
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OK, I was wondering about this. We have a `91 240, w/AC (broken), so have the manual fan, plus the electric on the radiator. Out of curiosity, we took off the manual fan and watched the temp gauge. Once it got warm, the electric fan came on and kept the temp gauge in the safe zone. Been driving for a couple weeks this way and seems OK. Without the AC, it looks like we can get away with this set-up.

96_S14_SE
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240canuck wrote:ok I got a question I got a 92 auto 240sx with no AC so i got no elctric fan all mechanical. would the easiest way to hook up an electric fan be to just wire it to a 12 volt source that turns on when your ignition is on? and leave it at that maybe 2 12" fans. will that be adequate? also how far from the rad should the fans be and do i need to use a the fan shroud also??


I would wire in one of those 4 wire relays, the blue ones from a nissan in. Run a lead from the battery to a 30 amp fuseable, then to the power in to the relay. Run the power out to the fan. Tap one of the triggers in to the primary ignition circuit, and ground the other out. This will allow the fan to come on with ign on.

You could do both this way or, better wire in a thermostat for the second fan, so that the power usage is halved unless needed.

Now:
Black240 wrote:now my question is.. would what this guy told me to do be right?

he told me that one fan will turn on at one point and then the other i think one around 80 deg and the other at like 1something...
Heres the deal there are two relays both tied to the ign primary and run off a single 30amp fusable. The stock fan is a 4 wire dual speed fan as well. When the car hits 95c - 203f the ecu signals the low speed relay on, and keeps it on till 100c - 212f, as well as anytime the ac is on below 100c - 212f.

When the car hits 100c the ecu trips out the second relay to come on turning the fan speed to high, it also comes on high anytime the triple pressure switch is on, with ac on.

Quote »I want to know if this is true or should I get a thermostat kit and wire the fans to that!? [/quote]It should work that way especially if both new fans are single speed fans. The only thing I dont really know is if the ecu kicks the low side off when the high side is activated. From trial and error, and IIRC in my dealings with it, it leaves both sides open reducing resistance in the motor of the fan allowing the increase in speed...

You could get a new plug from a JY, tie that in with simple butt crimp connectors to the new fans, and double check. If all is good solder the connections for a 100% connection and be done with it.

Another alternative is run a new relay like previously stated to the fan closest to the headder, and tie the neg to the oem harness. This has one fan spinning constantly when the ign switch is thrown. Then simply wire both pos and both neg together from the oem harness and tap that into one fan. It will spin only when getting too hot or with ac (as the second will be spinning constantly) and I feel this is the best way.

I can post wire colors and the likes on specific relay setup if you wish...

edit: btw I run dual speed altima fans in my car. One is directly plugged into the OEM cooling harnes with the other borrowing a ground, and then power is run from a new constant on relay, I ran (I had room for new relays in the box and it looks oem). The thing is I have the second (constant) fan wired to the high speed wiring into the motor yet it spins at low speed (still very very decent cfm's). This is why I say the ecu leaves both hot allowing more current to be drawn thus higher speed is achieved.

240canuck
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what gauge wire should I be using to wire in my fans??? and also what would be the easiest place to fing a primary ignition circuit would it be like the driving lights or something like that???

bruinbear714
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Hey Anand, u ever get the fans going in your car?

nnkfws333
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How would you wire in a thermostat? I was going to buy one but wasn't sure where to hook it up at. Meaning where can I draw power from (where, which wire) and also where do I hook it up ot a 20amp fuse. Thanks for the help.

Anand
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bruinbear714 wrote:Hey Anand, u ever get the fans going in your car?


LOL...actually no i have not.. I haven't had anytime to do it.. I did however install a short shifter. that took about 20 min..

Somehow thinking it will take me like couple of hours to finish and I am not too sure on how to do it so it keeps me from actually getting started... one of these days I'll just do it.

I had a question.. since I am going to take my clutch fan off.. do I need to replace any belts or anything or just take the clutch belt off andthat should be fine??? I just recently replaced all my belts and I don't really want to buy new ones..

nnkfws333
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No it should be fine. I need to get a thermostat on my AC fan cause summer is rolling around and Florida gets hotttttt

ZilverX
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For the stock AC fan, I took off the engine fan, started the car and watched it warm up. When it hit mid range on the gauge, the electric fan kicked in and kept the temperature under control. So, if this is the way ours works, I may not need to add an auxillary fan - ? Been running it this way for a couple weeks, and so far so good.

96_S14_SE
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Black240 wrote:I had a question.. since I am going to take my clutch fan off.. do I need to replace any belts or anything or just take the clutch belt off andthat should be fine??? I just recently replaced all my belts and I don't really want to buy new ones..


No you wont need any new belts and all belts will still be needed. You remove the belt and remove the mech fan assembly from the water pump pully. Bolt the pully back on, and attach the PS / water pump belt back on.

Anand
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thank you... now I just have to get myself to actually do it.. I have had the damn fans for the pase like 3 months or something...

xsblacksx
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whoa


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