electric fan conversion - which fan switch to choose?
#1
electric fan conversion - which fan switch to choose?
Hello.
Mine is a facelift V12 '92(with black bumper)
I am planning the electric fan conversion using the existing fan shroud and 17" 2 speed Ford fan (for Thunderbird/Taurus)
I am controlling it with a 3 pin thermo switch which I can screw on instead of the switch on the water pump.
Ref the sub fan, I bought an aftermarket 1700cfm 12" fan yet to fit.
I have to decide which fan switch to use, but I a wondering which to buy.
I would appreciate it when you give me any advice.
Here are the candidates;
1. Closing Temperature [°C]: unknown (low speed off)
Shut-off Point [°C]: unknown (high speed off)
Opening Temperature [°C]: 85 (low speed on)
Switch Point [°C]: 100 (high speed on)
* this is a diversion of X300 fan switch
2. Closing Temperature [°C]: 79
Shut-off Point [°C]: 85
Opening Temperature [°C]: 87
Switch Point [°C]: 93
3.
Closing Temperature [°C]: 88
Shut-off Point [°C]: 92
Opening Temperature [°C]: 93
Switch Point [°C]: 97
What matters will be what temp is the best for a V12 engine... But I have no idea.
I don't think 3 is good, for the closing temp is too high... The other spec doesn't seem so bad though.
1 and 2 has almost the same starting temp, but the temp for switching to high speed is different. Is 100 deg/C too high? Or maybe 93 deg/C too low?
Any advice will be appreciated.
Mine is a facelift V12 '92(with black bumper)
I am planning the electric fan conversion using the existing fan shroud and 17" 2 speed Ford fan (for Thunderbird/Taurus)
I am controlling it with a 3 pin thermo switch which I can screw on instead of the switch on the water pump.
Ref the sub fan, I bought an aftermarket 1700cfm 12" fan yet to fit.
I have to decide which fan switch to use, but I a wondering which to buy.
I would appreciate it when you give me any advice.
Here are the candidates;
1. Closing Temperature [°C]: unknown (low speed off)
Shut-off Point [°C]: unknown (high speed off)
Opening Temperature [°C]: 85 (low speed on)
Switch Point [°C]: 100 (high speed on)
* this is a diversion of X300 fan switch
2. Closing Temperature [°C]: 79
Shut-off Point [°C]: 85
Opening Temperature [°C]: 87
Switch Point [°C]: 93
3.
Closing Temperature [°C]: 88
Shut-off Point [°C]: 92
Opening Temperature [°C]: 93
Switch Point [°C]: 97
What matters will be what temp is the best for a V12 engine... But I have no idea.
I don't think 3 is good, for the closing temp is too high... The other spec doesn't seem so bad though.
1 and 2 has almost the same starting temp, but the temp for switching to high speed is different. Is 100 deg/C too high? Or maybe 93 deg/C too low?
Any advice will be appreciated.
#2
#3
maybe i just need my coffee but i am very confused by the data on your switches.
By opening and closing do you mean the switch itself?? Why would the switch be opening at a higher temperature than a lower one?
As a poor college student with a busted temperature switch I just straight wired my electric fan to come on with the ignition when I replaced it.
Sure it reduces the life of my cheapo fan, but it has no ill effects on the cooling system itself, so I don't really care for now.
By opening and closing do you mean the switch itself?? Why would the switch be opening at a higher temperature than a lower one?
As a poor college student with a busted temperature switch I just straight wired my electric fan to come on with the ignition when I replaced it.
Sure it reduces the life of my cheapo fan, but it has no ill effects on the cooling system itself, so I don't really care for now.
#4
I just copied & pasted the data, but I think opening means "on" and closing means "off", so it is not about the switch itself. I also confused at first though.
I want to control the fan neatly because I want to save electricity and fuel. When you turn the fan on while cold, the fuel will stay rich and waste gas. No to mention electricity.
Okay, then could someone tell me how high the temp is when the coolant temp gauge is in the middle? I will consult that temp to decide the sensor.
I want to control the fan neatly because I want to save electricity and fuel. When you turn the fan on while cold, the fuel will stay rich and waste gas. No to mention electricity.
Okay, then could someone tell me how high the temp is when the coolant temp gauge is in the middle? I will consult that temp to decide the sensor.
#5
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,920
Received 10,979 Likes
on
7,211 Posts
The old barrel gauges are not very accurate, though, so don't be fooled.
You certainly don't want the fans coming on sooner or longer than required....that's the whole idea of e-fans.
Maybe have low speed kick in at 93ºC and high speed at 98ºC or so?
More later, gotta get some work done !
Cheers
DD
The following users liked this post:
Japthug (02-20-2014)
#6
Thank you for the info all the time Doug.
Yes, that is what I am talking about! Sorry for my poor English...
I will keep on looking for some more switches which will be likely to be used.
I will keep on looking for some more switches which will be likely to be used.
#7
Good luck with the chnage. Well worth doing;
Greg
The following users liked this post:
Japthug (02-20-2014)
Trending Topics
#8
Hi Greg, thank you for the input. I must have made a mistake, the sub fan will be definitely too large... I can sell it off or maybe I can cut off the shroud.
I think the main fan must be okay, for the shroud is almost 18" and the fan I bought is 17.3". I can't say anything until I actually see the fan I bought... But the fan blade itself is 17" in the later model (at least on mine) so that'll fit.
I think the main fan must be okay, for the shroud is almost 18" and the fan I bought is 17.3". I can't say anything until I actually see the fan I bought... But the fan blade itself is 17" in the later model (at least on mine) so that'll fit.
Last edited by Japthug; 02-20-2014 at 01:16 PM.
#9
Hi Greg, thank you for the input. I must have made a mistake, the sub fan will be definitely too large... I can sell it off or maybe I can cut off the shroud.
I think the main fan must be okay, for the shroud is almost 18" and the fan I bought is 17.3". I can't say anything until I actually see the fan I bought... But the fan blade itself is 17" in the later model (at least on mine) so that'll fit.
I think the main fan must be okay, for the shroud is almost 18" and the fan I bought is 17.3". I can't say anything until I actually see the fan I bought... But the fan blade itself is 17" in the later model (at least on mine) so that'll fit.
But the main problem is how to mount them. You can fix them to the radiator fins, but I do not like this as I worry about the rad fracturing from the fan vibration. I made up a little fan chassis from aluminium square tube to hold the two fans and fixed the chassis to the toprail and the bottom cross member in rubber mountings. You could use the same mountings as the old shroud used if they are OK.
Good luck
Greg
#11
Well maybe the person who listed it is confused but "open" means disconnected and "closed" means the circuit in completed.
Either way the car will NOT run rich if the fans are constantly running.
If the car is not yet up to temperature the thermostats are not open, the fans are helping cool the radiator and the coolant that is inside it, but that coolant is not being circulated through the engine.
Having electric fans always on will technically give the alternator more work to do, but you are never going to see that at the pumps
Either way the car will NOT run rich if the fans are constantly running.
If the car is not yet up to temperature the thermostats are not open, the fans are helping cool the radiator and the coolant that is inside it, but that coolant is not being circulated through the engine.
Having electric fans always on will technically give the alternator more work to do, but you are never going to see that at the pumps
The following users liked this post:
Japthug (02-24-2014)
#12
Hi sidescrollin, thank you for the correction. You're right, I was mixed up with the knowledge of fan control and radiator temp.
I found out that the fan I am going to use pulls serious amount of electricity when hot, and now I understand the fan switch sits where the coolant that is cooled down through the radiator comes, I will go for the X300 temp switch. As you said it will make no problem when it starts to rotate while the coolant is not so high.
Thank you all for the information.
I found out that the fan I am going to use pulls serious amount of electricity when hot, and now I understand the fan switch sits where the coolant that is cooled down through the radiator comes, I will go for the X300 temp switch. As you said it will make no problem when it starts to rotate while the coolant is not so high.
Thank you all for the information.
#13
This device:
AutoSpeed - $25 Temperature Controller and Display!
can control a relay based on temperature readings and has a digital temperature display
having a hysteresis feature, they can be set for example to turn on a relay at 195*F, but not turn off again until the temperature has dropped to 190*F to avoid constant cycling
there is also a programmable offset so that the sensor can be adapted to temperature offset due to heat loss through a cooling jacket.
ebay has them in both centigrade and fahrenheit versions .. as well as 12vdc and mains operated displays ... make sure you get the right one, they all look the same
$20 to $25
AutoSpeed - $25 Temperature Controller and Display!
can control a relay based on temperature readings and has a digital temperature display
having a hysteresis feature, they can be set for example to turn on a relay at 195*F, but not turn off again until the temperature has dropped to 190*F to avoid constant cycling
there is also a programmable offset so that the sensor can be adapted to temperature offset due to heat loss through a cooling jacket.
ebay has them in both centigrade and fahrenheit versions .. as well as 12vdc and mains operated displays ... make sure you get the right one, they all look the same
$20 to $25
The following users liked this post:
Japthug (02-25-2014)
#14
Thread
Thread Starter
Forum
Replies
Last Post
abonano
S-Type / S type R Supercharged V8 ( X200 )
25
09-25-2015 10:43 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)