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best temp settings for a dual speed radiator fan?

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russosborne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote russosborne Quote  Post ReplyReply Direct Link To This Post Topic: best temp settings for a dual speed radiator fan?
    Posted: 20-October-2017 at 9:17PM
Using a 195 degree thermostat.
Thinking 200 or 210 for low with a shut off at 195, but no clue for the high speed. The cheap variable probe I am using is set to come on at about 205 currently.

Lincoln Mk VII/VIII (brain fart) factory electric fan so even low works extremely well. Never had a overheating issue with this fan other than the time I forgot to put antifreeze in and it came close to boiling. But that was all my fault. Embarrassed
Any/all thoughts on temps welcome.

I just want to get rid of the probe in the radiator fin sensor I have so I need to figure out the temps I need.
Thinking something like this for the sensor locations
http://www.steigerperformance.com/PRODUCTS/sp40001.html
the dual 3/8th inch one.

Unless someone knows of a better way to run two fan switches?

Thanks
Russ


Edited by russosborne - 20-October-2017 at 9:25PM
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aquartlow View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote aquartlow Quote  Post ReplyReply Direct Link To This Post Posted: 21-October-2017 at 1:31AM
With an adjustable fan controller(Derale 16749) you can install a sensor/sender in the heater hose to allow the wiring to be more easily hidden, but a sensor/sender that is not adjustable really needs to be installed into the engines water jacket(intake manifold) for a more confident or accurate temp readings. Anything that is placed away from the engine itself may add to inconsistent turn on/off temps. I would also recommend you use the sensors/senders as "triggers" only to send signals to larger 70 amp relays since the Mark VIII fan WILL KILL a standard 30/40 amp relay, doing so allows smaller gauge wires to/from sensor to signal the relay with larger 8-10 ga wiring to the fan and battery. Here is the difference between a 70 amp relay and a standard 30/40 amp relay.
 
I run dual fans on my BBF Ranchero(with associated wiring/controllers/relays), so I know or at least have an inkling on what you are going through.
 
  FWIW, I use a 160' T-stat but have my fans turn on @ 185' on the larger fan and 190' on the smaller fan(Ford Windstar dual fan assembly), doing this allows the fans to turn on/off without fighting the T-stat since the fans turn off 10 degrees lower than their respected turn on temp(in my application) the T-stat is fully open even when the fans turn off.
  

Edited by aquartlow - 21-October-2017 at 1:33AM
www.supermotors.net/22468
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russosborne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote russosborne Quote  Post ReplyReply Direct Link To This Post Posted: 21-October-2017 at 3:30PM
Thanks.
I agree wholeheartedly on using relays. In fact technically I am using two per speed. I have the current sensor switch feeding a regular Bosche style relay, and that turns on the constant use solenoid I am using to provide power to the fan. I will be doing this for both speeds once I get that far.
Might be a tad overkill, but I had the solenoid anyway so figured why not? Definitely won't hurt anything, and the solenoid can handle all the power the Lincoln fan draws and more. And worst case I can use a standard Ford starter solenoid to replace it in an emergency (but not recommended for long term use though).

As far as using the water jacket I'm not sure I have enough places, would need three, one for the temp gauge, and two for the fan switchs. Agreed it is better though if I can.

Russ



Edited by russosborne - 21-October-2017 at 3:34PM
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aquartlow View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote aquartlow Quote  Post ReplyReply Direct Link To This Post Posted: 21-October-2017 at 4:07PM
Nothing wrong with a "little" overkill when dealing with a vehicle's electrical loads. Be careful with choosing/using solenoids, make sure they are rated "continuous duty" or they could overheat and fry internally in short order depending on current going through the solenoid. A Ford fender mount style solenoid is usually rated as "intermittent duty", so just do a little checking/verifying before laying out the coin for one or more.
Here are examples of a continuous duty solenoid:
 
Here is an example of an intermittent duty solenoid(note the likeness toward a Ford starter solenoid):
  
Just an FYI. Good luck with your install.
www.supermotors.net/22468
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russosborne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote russosborne Quote  Post ReplyReply Direct Link To This Post Posted: 21-October-2017 at 9:53PM
Thanks.
Yeah, the solenoids I have are continous duty. Just mentioned using the Ford starter soleniods in an emergency. They are a bit easier to get sometimes than a 70 amp relay.
Russ
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 22-October-2017 at 9:19AM
golf cart parts
 
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