Picked up a trailer in Calgary for my brother. Took it out to the farm 365 kms. and dropped off a core Hemi engine that I picked up 2 weeks ago, and a couple of 1000 litre totes.
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Then we picked up a 2003 Dodge Ram with a 5.7 Hemi and hauled it to the farm. About a 156 kms one way.
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And this was towed with no engine fan!
I took it easy on the hills, but it that was the only time I even came close to worry about it overheating. The oil temp got to a high of 107 degrees C, but strangely enough that was after the hill. Some kind of thermal lag happening there. Normally the oil temp is 101 *.
I now have Torque Pro running on my phablet with the OBDLink MX Bluetooth adapter. I highly recommend this!
Now I know what is normal (at least for my truck) for IPR duty cycle and HPOP pressure.