Why wouldn't either one of these PWM controllers from Amazon work?
This one is rated for 5 amp output
https://www.amazon.com/uniquegoods-...195327&sr=8-3&keywords=12+volt+pwm+controller
This one is rated for 60 amps
https://www.amazon.com/ELEGIANT-10-...195327&sr=8-4&keywords=12+volt+pwm+controller
Once you hooked it up and verified it was working, you could set the speed for different conditions with the speed control manually, and then measure the resistance for that speed. You could have say 3 speeds. So instead of the potentiometer, you would have 3 resistors with small 12v relays which could be fired by temperature switches and the A/C clutch system.
Those both use a potentiometer to control fan speed and have no way to control fan speed based on temperature, you could use it if you want a completely manual system but I would like something more on the adjustable automatic side.
This whole project is down the drain if he can't figure out a thread adapter. I see a potential for someone to make some money if they wanted to start making an adapter. There has to be something better than the original unit that comes on at 230 degrees. If this pans out I could get rid of my locked fan.
P.S. How hard are the original clutches to take apart? Could you take it apart, and be left with a shaft and the original threaded nut. Chuck that in the lathe and turn the hex of the original nut down till it was round. Is there enough meat left to turn the metric threads onto the remaining old nut?
The bushing shouldn’t take a good machinists more then an hour to make, I have a small lathe I’m going to try and make one on but I’m not very experienced with making threads yet.
As for the original fan clutch, you could take it apart and mill down the 47/48mm hex to the 40mm x 2.0 thread and use that as a bushing but then your destroying a clutch you could sell.
Does anyone know what size wrench takes the original clutch off? He said the new clutch had 40mm threads, which comes out to 1.575 inches.
It’s a 47/48mm nut from what I recall, my idi fan clutch wrench says 47mm but measures 48.xxmm and it fits on the 6.4L fan nut.
Isn't the whole point of having an electric fan that it's off and not creating any resistance for the engine when it's not needed? Otherwise, I seem to remember a mod on here awhile ago about getting the stock clutch to engage at a lower temperature.
The problem with the factory clutch is it only reacts to engine temp and fairly late at that unless you modify it to turn on earlier which is just wasting engine power for nothing. With the electronic clutch you can engage it to help with ac performance at idle, tranny temp when off roading or climbing steep hills at a slow speed where the torque converter would be unlocked and pumping out large amounts of heat and even help your intercooler on the large steep hills where you have little air flow and large engine load.
Does anyone know what diameter the 6.0 fans are?
Not sure on the fan but the fan clutch mounting is the same between the 6.9/7.3idi, 7.3ps, 6.0ps, 6.4ps. The 6.9/7.3idi and 6.4ps are both standard rotation (left hand thread) and the 7.3ps, 6.0ps and 6.7ps are reverse rotation (right hand threads).
Here’s a few links on the specs of the different fan clutches
6.9/7.3 idi
https://www.rockauto.com/en/moreinfo.php?pk=1793468&cc=1126729&jsn=8
7.3ps
https://www.rockauto.com/en/moreinfo.php?pk=1793514&cc=1127090&jsn=10606
6.0ps
https://www.rockauto.com/en/moreinfo.php?pk=1793478&cc=1427891&jsn=10703
6.4ps
https://www.rockauto.com/en/moreinfo.php?pk=2420658&cc=1444017&jsn=10800
6.7ps
https://www.rockauto.com/en/moreinfo.php?pk=6367779&cc=1501968&jsn=10893
Is there any way that electronic actuator could be adapted to the older style fan clutch? That could simplify things, maybe?
No way of modifying the idi’s clutch cheapy or easily even if you could find the electronic lockup mechanism sold separately.