Electric Fan Questions

[SR20DET240]

Never really done the research myslef. Cheapest place would probably eBay.

Try doing a search, if that yields none to your liking, then make a post.

[96_S14_SE]

That guy in the picture has a/c.... First off I noticed the condensor hard lines, then he said he replaced the mech and condensor fan in the text And his setup is a bad idea as only 60% of the rad is getting cooled. In the florida heat my 16 fan mated like that caused it to overheat with the ac on quickly in traffic.

Another way to use the condensor fan or tie into the condensor harness, yet have it run continuously is to take the ac fan low relay and cut the ecu input wire (going into the relay) and ground it (the side going into the relay). This way it only is on with ignition on, though with just ign on its still on hehehe great for in between strip runs or auto-x laps though, but not so good if your just chilling in a lot listening to tunes, sans car running. Thats why they made switches though.

I personally use dual altima fans that have dual speed settings, but they dont fit without some heavy hacking of the fan assembly. I have one wired to a new relay always on on low (a bullet connector is between the fan and relay to allow me to cut power on cool days of car off ignition on sits) and the second just took the role of my ac condensor fan. The always on fan is on the drivers side as well so that I have air running past my header durring idle time.

[4cefed]

Another advantage to giong to an electric fan it to lose some rotating mass. With less rotating mass, you can build RPMs faster, and those of you with boosted engines know the faster you build RPMs, the faster you can make boost. yes, there will be some increased drag from the alternator when the fan comes on, but not as much as that mechanical fan is adding.

[1 Dirty Truck]

See what I get for not reading the whole article?! Thanks for finding that out and not ripping me a new one.

I cannot comment about the free revving of the car due to the fact that we didn't recconect the recirc box (Yeah you don't need that!) which made the car loose most of it's low end.

Then the rad crapped out on me. I will be driving the car again in a month or two and will not feel any of the difference. hahahaha

[SR20DET240]

4cefed,

That what I was saying before. On that link at the very top, I believe the est. power #s were .5kw power drain from engine, while the mech fan uses 4 kw of engine power. Dont quote me on that though.

The reason we are putting fans on bazan's car is because the old viscous clutch is seized up, so he going with e-fans instead of buying a new fan clutch.

[96_S14_SE]

I can and have commented onthe power gains of the elec fan swap. I happen to have an automatic and gained 1.5 - 2 tenths in the quarter as well as increasing my MPG by 3 on the average.

Over the cpl of years Ive had it its saved me at least 3 times the initial cost of the 16" fan (95$ which I sold to my friend with a 300zx TT for 50$ and bought the alti fans for 50$) in fuel alone.

We slapped it on the Z with a coustom aluminum fan shroud and the improvement was imediate and noticeable. IIRC he shaved a tenth or so off of his time. He went from a 12.1 to a 12.0 placing him 3rd in the stock turbo Z32 catagory.

[tad_240]

Okay, not to sound like a total idiot, but I don't know a whole lot about the electronics invoved with the electric fans, so how do they know when to kick on, I seen someone had something about somekind of box, but was not sure. I have a 90 240 and have taken the A/C out because when I got the car someone had cut the wires going to the condenser( I have no idea why, unless it locked up?) so would I only need one fan , and in that case, should I get one 12 inch or one 15 inch fan? I am new to the site, so any help would be great.

:help

[bruinbear714]

Most people get dual 10s or dual 12s. The fans are controlled by a thermostat control circuit. You place the probe on your radiator, through the fins, or in your hose and it'll tell the circuit when to turn on the fans.

Pros of getting the fan:

1) cleans up your engine bay. there will be a LOT of room as you can see in the picture below in my engine bay.

2) improved gas mileage. I get about 2-3 miles per gallon extra with an electric fan. This is because at speeds higher than 40mph your radiator is cooled by the air flow and your engine doesn't that mechanical fan to drag it down.

3) improved engine response.

4) hp increase? maybe, but very slight.

Cons:

1) when it is on, it is loud and sucks up about 15-20Amps of current

2) can overheat your engine if you don't install it correctly. Very difficult to mess up the install if you follow directions.

3) Puts more drag on the engine when it is on than the mechanical fan.

[4cefed]

4cefed,

That what I was saying before. On that link at the very top, I believe the est. power #s were .5kw power drain from engine, while the mech fan uses 4 kw of engine power. Dont quote me on that though.

Doh, maybe I'll pay more attention.

[tad_240]

thank you for all the info bruinbear714, you answered alot of my questions, but i am still a little confused about the best way to mount the fans to the radiator. I read earlier that plastic screws would work but i think that they would get too hot and like someone else said, those nice new fans would not be so nice if they fell off, so any input on this question would help. Also, is removal of the mechanical fan clutch and blade that easy? Do you have to unplug any wires or switches, and what all needs to come off of the front of the motor, by the way, I have not looked at it that close, so if there is next to nothing, forgive me for asking, thanks

:smoker

[240fan]

the AC condensor fan comes on for 3 different reasonsits in the Hanes book, going from memory its like-the AC is on and your speed is below 40(45?)-speed below 40 and temp hits 195-temp 212 at any speed so I just wired the 14" slimline motor to the original nissan wire to the condensor fan relay, with a switch override to turn the fan on when I want it, that grounds a wire at the ecu that controls the relay. the switch lights up when my fan is on, unless the relay cuts in and turns the fan on automatically. I would recommend the twin electrics though. on heavy traffic and over 90'F the single 14" doesnt cool it enough.