Designing A 3 ECT Sensor Setup for the 6.5

[FellowTraveler]

As a side, Jay I see you use EVANS did you ever seal the openings between the radiator and support? There is an awful lot of air flowing around radiator at speed through the gap around it, remove the upper shroud and look down you will see what I mean here.

 

[schiker]

Another idea/thought.

I assume the thermostatic switch will be a variable resistance type sensor/switch. Such that PWM controller will measure the resistance of sensor (higher resistance = higher temperature) then progressively increase PWM % to increase fan speed.

You might be able to put a Potentiometer in series with the thermostatic sensor to fool the controller and turn fan on softly to cool A/C in stop and go traffic. It would cause the PWM to be off scale if the coolant temp sensor triggered but it will be a safe side increase so to speak. It will cool more not less. To get back to normal just turn potentiometer back to zero.

Might could put potentiometer in parallel if the PWM controller had a strong enough ref voltage but not as sure about that way. If you turned it to zero it would screw with the measurement as a ground reading ????? I think. Might could put a resistor inline to ground to keep some baseline resistance to offset it and the sensor might stay closer to original scale.

 

[FellowTraveler]

WESTACH http://www.westach.com/ has dual cylinder head temp gauges and individual sensors that can be placed under glows or injectors to get a more accurate reading of your diesel under all conditions.

I've been wanting to do this cyl head temp monitoring on my Burb but medical expanses have curtailed that a bit.