Tiderfish

I need some truck specific advice for my EFAN swap.

I have already done the work. I have a BMW's efan that is rated at sixtymillion CFMs give or take. It is wired directly to the battery via 70AMP relay. I can activate the thing at will by jumpering the low voltage side of the relay.

The fan and shroud is all one piece. I was lucky and was able to fit the BMW fan/shroud inside the truck's shroud. This should provide some extra cooling since the BMW's fan/shroud is not as large as the truck's radiator.

I want it to activate when the radiator gets hot. So I got a thermal switch that closes when it reaches 190*F (+-5*) I know this is not right, so who makes a good thermal switch and where should I put it?

I have all the wiring on the passenger side near the battery. The wires are as short as I could make them to reduce loss. So the passenger side near the upper hose is ideal.

I would like to have the sensor touch the actual water, but just being inside the fins is good enough.

So to recap:

What thermal-switch do I need?
What temperature switch do I need?
Where is the ideal place to put it?

dr_bowtie

you can search this forum for my Efan swap thread or Google it and all the answers to your questions are there

Tiderfish

Okay, after searching a bit, I think I found the correct post.
https://www.f150forum.com/f10/swappe...at-pain-35751/


"this unit works great...if I had to buy one I would opt for the screw in sensor that goes off the water...Summit has them..."

Got any more details on that sensor?

"I have it set to kick on at 170degrees and it kicks off and 162degrees."
How did you get they kind of control?

I am afraid with the setup I have now it will be constantly turning on and off, and eventually damage something.

Finally the fan I used has many speeds, I am told a PWM will be able to adjust the speeds for various temps and loads. Does anyone have any more information on this?

Tiderfish

I have searched Google some, but I do not trust random schmucks. I want to hear from you guys on THIS forum.

dr_bowtie

Look for my Ebay Efan thread... there are links in there with BOTH parts and the Heavy Duty relays too

Tiderfish

I searched for posts created with your name with Ebay Efan as the keywords, and didn't find anything. Any more clues?

I even did a Google search and only found this thread.

unit505

If you look at the the main page for 86-96 f150, you'll see a thread pretty much maintained by several of us. If you take time to read all of the input, you'll find part numbers for the t-stat switches using a probe, wiring diagrams, Etc.
https://www.f150forum.com/f10/electric-fan-swap-152094/

I don't think any of us on that thread have gone with a "In Flow" sensor, but the fin probe does an outstanding job. Too many of us using it without issues to knock it.

Tiderfish

I did read the thread, of course after I posted this one. However I still did not see part numbers or links to where or what to buy. I will look again.

unit505

Actually the part number is in another post that is linked to the thread I posted. This fan controller works great. Actually, unless you do allot of idling, you'll never see the e-fan work. My e-fan only comes on after 10-15 minutes at idle or really slow driving where there's not enough air moving through the radiator. I've never had my fans come on after exceeding about 30mph.

http://www.autozone.com/autozone/par...=267187_9581_0

https://www.f150forum.com/f10/my-e-f...155144/index2/

Tiderfish

Thanks for re-posting those links. I am looking at the autozone kit, I don't get what it is.?

Is it a controller that senses heat and then shorts the relay at a pre-defined temp?

Does it have any settings? Like when to turn on and when to turn off the fan?