Electric fans

Yesterday evening I finished the electric fan swop, swopped my normal fan for 2 12" electric fans with 2 fan switches, 1 switch is a lower temp and the 2nd a higher temp for backup, works good, thanks to freddy for the telephone support on the relay wiring.

No problem Derek. This electric fans issue, forced me to look into the matter in a different way. I decided to build a small electronic circuit for switching the fans, instead of the water thermal switches. I pick up a voltage signal from the existing thermal switch on the engine block. That signal gets compaired via a op amp and switches the fans on or off.
The circuit is working-now I need the fans. Will posts pics soon. Cost of this electronic switch is nothing more than R50-00, although all components were lying around in my hobby shop.

Freddy,do you think your method will let the car run even colder, in other words do you think the fans will switch on earlier with the thermostat or the thermo switches ?

Deek, you can control the switch with a little potentiometer. In other word, you can decide where the fans must switch in. So I would answer yes.

[img][img]http://i112.photobucket.com/albums/n187/fsnijman/68060016.jpg[/img][/img]

Ive got 12" electric fans on my radiator now aswell, they are connected to the Ignition with a relay, so basically if the car is on the Fans are on.Runs somewhat cooler than the mechanical fan wich runs the whole time anyway aswell.

mine works off a temp. switch, i wouldent say mine runs much cooler, Ero_sennin, aren't you scared that your fan motors burn out because it runs the whole time aswell? Then I must add that I have 2X 12" fans witch pulls an average of 15 amps, this means your alternator is working harder now because of the extra charge, this works against the motor pullys, if it switches on and of on certain tempretures the alternater just work harder now and then. Ask Freddy he will explain a bit better but I wonder if it is good for the alternator and fan motors to run all the time when car is switched on....just an opinion

thats what i was wondering aswell thats why i posted, well if it burns out i've got two spare fans.
Well if someone can maybe tell/show a diagram of how to connect it to a thermostat or something then I can do that then.
Maybe wire in an over ride for what ever reason then aswell

only problem I have with "car is on the Fans are on" is that you need to be sure your battery is shapshap alla the time. The compression makes you use everything your battery can throw at it to crank the engine - as soon as your battery is going south then you kill it even more by first starting the fans and then the engine...

Also, how are ya gonna just sit and listen to your boom box without running the fans and engine?

Not to knock the idea (I trust hard-rigged switches more than thingies switching other thingies on without you knowing whether they are actually running - unless you have a LED showing your fans are running 😀 or even better - an engine heat gauge (not just water heat))

At the moment I am also in the same boat - my viscous clutch on my fan is seized fast, so it eats more engine power... where did you get the electric fans then?

adios
wind-o-maker

by the way, about the oil - I went to my traditional healer and he gave me a recipe for "Chuckpiss" he calls it (no relation to THE CHUCK - my healer still has all his teeth). You take only 1 litre of turps (saves weight as well!!!), add to that a teaspoon full of black peppercorns, 2 tablespoons Tabasco, a cup of rough iron filings (helps keep everything inside nice and smooth and polished shiny), one human finger (something about showing the gears the right way and good luck... well, not for the previous owner of the finger), various veggies (learned from doctor Mantu's magic AIDS cure) and the left nut of the endangered brown eagle. Basically he says that the CA18DET is so moer-of-strong, you can put anything in there! He says if you want to fight over oil, either buy a Golf, or write to George Dubbaya Boost

now, where did I put that rubber chicken
Time to shaddap again

Are you on the e-mail system then I can send you a thing I drew in paint, very simple to understand, not as technical as in science class, I'm a simple guy all these big diagrams with resistors and and and.... looks so complicated.
It might not burn out, or it may, if you have spare it is good but if it happens on the highway too some far and gone place you are fuckerised...by murphy and chuck will tell you "Murphy must just try this with me...."

Also, how are ya gonna just sit and listen to your boom box without running the fans and engine?

they sorta only turn on when i deactivate the imobilisor. 😂

Are you on the e-mail system then I can send you a thing I drew in paint,

Yup Im on the email system

I might need your direct e-mail to send it to you sunshine....pm it to me if ya want.

Did you get it, If you want we can get together tonight or so then I can show you the conversion I did on mine and chat a bit.

As widowmaker once said: "Sheeeeeyyyaaazzz!!"

Just stick with the original fan and you got no problems! 😀 Fan clutch can be had from Universal Coolers http://www.hot4cold.co.za/html/viscous_clutches.html for about R1300. Same as the one for the 300ZX. Fit and forget!

the whole setup for the electric fans cost me R650, it's alot easier to replace and cost alot less, plus I get some power to boot, the extra amps it pulls from the alternator is nothing compared to the strain the viscues fan puts on the engin, to replace a fan will cost me R105....temp.switches....R70.. copper pipe in line with radiator pipe R250( never needs to be replaced)and I can get it anywhere I please midas, auto zone.... I then just want to ad that when jou viscues fan seases or brakes or whatever you are in the same boat as someone with blown elctric jans and stuff, I have heard of cases where the visques fan has distroyd radiators and waterpumps.

My opinion is electric is a win win situation if you apply it correctly

electric fans are good. Id like to swap. But IMO nothing beats the cooling capacity of the viscious. wish i could get another standard fan shroud. Mine is cracked and melted and looking well dodgy

I spoke to a auto elec/mechanic about the fan story, he gave me a good idea, he said he would run 1 fan all the time and the 2nd from a temp. switch.
He also said that a car running too cold is just as dangerous as a car running too hot.

My car was running in 2 stripes and a little bit when it was hot with the viscues fan and the same now, only diffs is my car gets to that temp faster and as for the oil, I recon I'll put in GTX RS witch is W5-W60 that can handel the heat and cold...then I'm covered.

those cases sounds painfully familiar... anyway about the water pump - I have said this in the mailinglist. Nissan asked me sumn like R1400 or 2400 or someting jags, then I risked my ass to go to a parts shop in town that mainly caters to taxis and got a flippin box shape sentra CA18DE water pump for R100 plus VAT - brand spankme new. I had to jippo it a leeeetle bit to get on (buy one of them long thin stick-file thingies and take it easy to adjust holes and so), but it even looked better than the one i had on. BIG price diff.

What place was it? Eddies spares maybe?
I should go there maybe I can get some New replacement parts aswell. LOL
If it works it works!!!!!!

Most parts we need are the same as other nissans like the sentra and sti's, all you need do is take a sample and tell them to mach it, 95% of the time you will get what you need at a very good price. For example, Nissan timing belt R370 Midas match R 116, save baby save!!!