Supra ST Myster Posted July 4, 2007 Share Posted July 4, 2007 How do people normally wire these in, so they are on all the time like the visious fan or to a temp controll unit so when the water temp gets to a certain mark they kick in? Link to comment Share on other sites More sharing options...
Pig Posted July 4, 2007 Share Posted July 4, 2007 I have heard they can be wired through an AEM - other than that, on all the time or linked to the thermostat Link to comment Share on other sites More sharing options...
SimonB Posted July 4, 2007 Share Posted July 4, 2007 You want them on a thermostat. The viscous fan is not on all the time, that's the point, it only locks up when it needs to. You don't want the fans on when you have enough air flowing through the rad anyway or they'll get in the way of that air, and it's a waste of power having them on when the temps are low. Link to comment Share on other sites More sharing options...
Supra ST Myster Posted July 4, 2007 Author Share Posted July 4, 2007 You want them on a thermostat. The viscous fan is not on all the time, that's the point, it only locks up when it needs to. You don't want the fans on when you have enough air flowing through the rad anyway or they'll get in the way of that air, and it's a waste of power having them on when the temps are low. Oh i didnt know that about the viscous fan,!! do you think the viscious fan is using more power to run over the twin electric ones? Link to comment Share on other sites More sharing options...
SimonB Posted July 4, 2007 Share Posted July 4, 2007 Oh i didnt know that about the viscous fan,!! do you think the viscious fan is using more power to run over the twin electric ones? Probably not. It's directly connected whereas the electric ones have to turn the alternator to produce electricity (which loses some power) and then turn the motors to produce movement again (which loses some more). Link to comment Share on other sites More sharing options...
tooquicktostop Posted July 4, 2007 Share Posted July 4, 2007 I run mine of AEM But have a Kenlowe thermostat that is almost brand new if you want to make me an offer, cost £60 a few weeks ago The kenlowe gives you control to turn the temp up in winter and down in summer, simple technology but effective Link to comment Share on other sites More sharing options...
Class One Posted July 4, 2007 Share Posted July 4, 2007 Billy has his wired up on a thermo Emin, so does Steve (and Adam) Sherwood on their car, and the Sherwood's car is runing huge power. Link to comment Share on other sites More sharing options...
bondango Posted July 4, 2007 Share Posted July 4, 2007 If you go with the above, or any Fan controller for that matter, make sure you use a heavy inline fuse and at least a 30amp Relay for EACH fan, they do draw a lot of current. If you wanna go electronic, HKS do a nice controller for dual fans so you can switch them on a different temps, it also controls IC water Spray, theres also a great one on Fleebay by Pivot. Link to comment Share on other sites More sharing options...
SimonB Posted July 4, 2007 Share Posted July 4, 2007 If you go with the above, or any Fan controller for that matter, make sure you use a heavy inline fuse and at least a 30amp Relay for EACH fan, they do draw a lot of current. If you wanna go electronic, HKS do a nice controller for dual fans so you can switch them on a different temps, it also controls IC water Spray, theres also a great one on Fleebay by Pivot. It's not cheap though, and takes up room in the dash somewhere. I made my own - small box from Maplin, 2 auto relays, a power distribution thingy for amps, thermostatic switch from X-eng (http://www.x-eng.co.uk/X-Therm.asp), couple of blue leds and a switch in the dash. Total cost about £50. Link to comment Share on other sites More sharing options...
AlanM Posted July 4, 2007 Share Posted July 4, 2007 I have the thermostatic switch from x-eng. How did you wire that all together Simon, could you do a diagram please? Link to comment Share on other sites More sharing options...
gaz1 Posted July 5, 2007 Share Posted July 5, 2007 i have mine running of the aem also;) Link to comment Share on other sites More sharing options...
SUPRASUZUKI Posted July 5, 2007 Share Posted July 5, 2007 If you go with the above, or any Fan controller for that matter, make sure you use a heavy inline fuse and at least a 30amp Relay for EACH fan, they do draw a lot of current. Agreed. I blew a a couple of 30amp fuses in quick succession(they blew as the fan initiated). I switched to a 40amp fuse and it's been fine since. Link to comment Share on other sites More sharing options...
SimonB Posted July 10, 2007 Share Posted July 10, 2007 I have the thermostatic switch from x-eng. How did you wire that all together Simon, could you do a diagram please? Here you go, thought it was probably a good idea to do one so I know how the hell I wired it up if I ever need to fix it! Basically there are two 30A auto relays that are wired direct to the +ve battery terminal (via a car stereo distribution block inside my box) - the output from these goes to the fans. The fan negatives are wired direct to the battery -ve. The input on the X-eng thermostat switch goes to a +12v ignition switched source - I used one of the VSV wires I no longer need. The two outputs (low and high) go to the relay coils, with the other side of those grounded. That gives you your basic operation. I have a fan override switch with a LED backlight, and a couple of LEDs that show when the two fans are running. That's the bottom of the diagram. I needed to use a DPDT relay otherwise whenever one of the fans is on the light on the switch would light up. This is just a small current relay I had from Maplins. There are 5 wires that go from the control box to the dash (+12V permanent, two fan activity lines and two relay control lines). The ground I just connected up to a ground point behind the dash. You could get a permenant 12v from behind the dash somewhere too and save yourself a wire if you could be arsed. Oh, I didn't show the fuse, which is between the battery +12V connection and the distribution block that goes to the relays. Link to comment Share on other sites More sharing options...
AlanM Posted July 10, 2007 Share Posted July 10, 2007 Thanks Simon, appreciated Link to comment Share on other sites More sharing options...
bolarbag Posted July 11, 2007 Share Posted July 11, 2007 It's directly connected whereas the electric ones have to turn the alternator to produce electricity (which loses some power) and then turn the motors to produce movement again (which loses some more). I've seen this description a few times, true fans will draw more current, but unless you have a big i.c.e install then its readily available, as the revs increase the more the alternator can convert, there is no draw on the engine as the alternator pulley runs freely, so taking the 5kg viscous fan out is a plus. Your only disadvantage is when your sitting at idle and you have the fans running, good for keeping temps down, but big draw on the alternator...which if its not up to the job will just draw straight from battery, You don't want the fans on when you have enough air flowing through the rad anyway or they'll get in the way of that air, and it's a waste of power having them on when the temps are low. Again another valid point, there is an optimum that the viscous fan can flow at above a certain speeds, so as Simon indicates it would be a waste to use them at high speed, pushing against flow. The electric fans are good, but they need to be properly ducted otherwise their no use, the standard ducting with the viscous fan is very good hence why theres not much advantage other than a little more control with the electric fans. imho unless your a bling king, you would be better off staying stock...I can't be arsed going back now that I have already bought them:rolleyes: Link to comment Share on other sites More sharing options...
Kev.O Posted August 4, 2007 Share Posted August 4, 2007 So if using the AEM to control the fans, can it turn on each fan at different temperatures? I want to know how many wires to run to the AEM Link to comment Share on other sites More sharing options...
SUPRASUZUKI Posted August 5, 2007 Share Posted August 5, 2007 Anyone interested in fan switches for different temperatures, the intermoto range and part numbers can be seen here - http://tvr3.dspen.com/Otter_Switches.html Link to comment Share on other sites More sharing options...
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