Is there a way to get the probe into the fluid itself? Maybe a different probe option?

My only concerns with the external probes are that they go in the radiator instead of the engine itself, and they measure the radiator's physical structure along with air passing through more than they do the fluid coursing through the engine.

 

the temp switch is adjustable. The probe is a must stay dry item, at least I think thats what the directions said somewhere. I think the probe is close enough +-10* of the water temp. I used the heat gun to set my temps. Also there is not much airflow where I have the probe.

 

you're making it a lot harder than it needs to be..

I use and trust the probe.. all you gotta do is fire up the truck, watch the temp gauge, when you reach operating temperature, walk over to the controller (if it's controller controlled adjustable) and turn it until the fans fire.. if it isn't controller adjustable, stick the probe in the rad in a place where the temperature is warm enough to engage the fans..

a ten dollar IR temp gun will make short work of this.. it all starts with a truck idling at operating temperature, no matter how you adjust it.

 

http://www.ebay.com/itm/UNIVERSAL-1-...b8760a&vxp=mtr

Here's something you simply put in the top radiator hose.

 

nice find! I would go for that if I didnt already have a functional system in place. But you would still need a sensor and some sort of wire harness, could you refrence those too?

 

http://www.ebay.com/itm/140765663770...84.m1438.l2649

http://www.ebay.com/itm/Professional...bd7737&vxp=mtr

This is what I am purchasing as soon as my wife gets home and gives the thumbs up. Since the connector on the CTS is simply two wires that can be connected to the fan harness, it will be a simple splice job to the fan switch.

 

+1......

 

I saw zero difference with my e-fan.

The best benifit? On hot days when the clutch would lock up and zap about 20hp is a thing of the past.
I drove my Grandpas 01 CTD for a week, and didn't even manage 14MPG, that's worse than my Dakota, and diesel is more expensive. Stupid automatic tranny garbage.

 

i think i have to agree with Hahns about the electric fan. i have got some of the highest gas mileage in my 81 with the mechanical fan on. the electric fan did not seem to make any noticeable difference other than the truck got quieter and maybe a bit more power.

 

I installed a TCP fan on my Ram, but haven't driven it enough to notice mileage difference. It uses temp sensor to controller and another input form AC compressor clutch. When temp gets to 180, fan #1 comes on at 50%. When AC is turned on, they both run at 100%. Driving around town today at 90+ degrees with AC on, temp was reading 181 degrees. Holds pretty steady around that temp. (also have 180 stat and SCT tune).


Also installed e fans on Jag several years ago with the probe in the radiator. As drew mentioned, used IR therm to determine where to install for correct temp readings. Seems to work well aslo.

Have not hadd any problems with alternators running electric fans.......