How to: V6 Efan Conversion

[Xsen]

So coming back to this thread. I've found the PWM parameters - the fan expects 100 Hz PWM signal, positive polarity.

Now in the HPTuners editor I see that the PCM has the option of controlling the fan by the PWM signal, which would be the best way to get it working, as I would be able to fine tune the fan speed VS ECT. Has anyone ever tried going this route? True, a standalone fan controller is also an option, but I would rather stick with the OE PCM and not add any more failure points to the system.

Looking for the output pin number and the schematic in general - is the PCM directly connected to the fan motor or is there another module between. Will post my findings anyway, but maybe someone already knows all the answers and would be willing to share!

EDIT:
Here's how it looks in the schematic for a 2013 3.6 Ram:


Looks like the control signal is connected directly to pin 30 Connector 1. Or am I reading this wrong?

 

[Hemi395]

So coming back to this thread. I've found the PWM parameters - the fan expects 100 Hz PWM signal, positive polarity.

Now in the HPTuners editor I see that the PCM has the option of controlling the fan by the PWM signal, which would be the best way to get it working, as I would be able to fine tune the fan speed VS ECT. Has anyone ever tried going this route? True, a standalone fan controller is also an option, but I would rather stick with the OE PCM and not add any more failure points to the system.

Looking for the output pin number and the schematic in general - is the PCM directly connected to the fan motor or is there another module between. Will post my findings anyway, but maybe someone already knows all the answers and would be willing to share!

EDIT:
Here's how it looks in the schematic for a 2013 3.6 Ram:
View attachment 533034

Looks like the control signal is connected directly to pin 30 Connector 1. Or am I reading this wrong?

@crazykid1994 would be your guy to answer this

 

[Xsen]

@crazykid1994 would be your guy to answer this

Judging by his post on the previous page, I think he went with a standalone fan controller.

 

[Hemi395]

Judging by his post on the previous page, I think he went with a standalone fan controller.

He did. But he also did a lot of research on how to make it work with factory PCM so he has a good amount of knowledge on the subject.

 

[Shawn Burns]

I just wanted to revive this old page to add my experiences during the install.

First, I've watched the boosted videos and studied the how to in this thread. My clutch fan was an absolute stuck on ***** to get off. My solution was to heat the fan nut with MAP gas, while I used a breaker bar in the belt tensioner. The nut took about a minute and a half of steady flame, before it broke it's bond. I found that underneath the truck gave me better access to loosen the nut with a larger cresent wrench, especially after I removed the outermost portion of the shroud. I rigged a ratchet strap on the breaker bar, to keep steady tension on the belt while I was underneath the truck.

So far, my impressions are very good. I went with the dorman fan from Amason. The fan is butter smooth and can barely be heard under most circumstances. I have a tune from hemifever and a diablo tuner. I modified the tune to turn on at 196, from what others have recommended. Sean had it set to turn on at 212 (I think). I have a 180 stant thermostat that was already installed. I've noticed that the fan is turing on at 186 degrees for some reason. Sean may be right. I may adjust that up a bit after some testing.

The temps in PA are mild and I haven't towed with it yet either. I will report back with temp data from the next time that I tow.

Driveability... I am in the camp that it has freed up some power. I mostly feel a throttle response improvement. It also feels like the truck is easier to drive smoothly. Under some circumstances, the clutch fan can cause the motor to respond with a heavy flywheel-type of effect. The clutch fan made it difficult to drive smoothly under those circumstances. That feeling is gone now.

Economy... Initially, I feel that the truck has an easier time doing what I usually do. Some of that may be hopeful thinking and the psychological response to this type of thinking. I can post back when I have the chance to do some highway miles.