I just towed my new 5th wheel home from Grande Prairie to Fort Mac, about a 7 - 8 hour drive. Had my tuning on the 8k tow setting. Towed like a champ, EGT's never went over 1300 and I pulled some serious hills. Coolant temp did go up pretty high a couple of times, but it might be a little low, seem to have a bit of a leak in the egr.
The EOT and ECT stayed pretty much within 10 to 13 degrees of each other, which I think considering how hard I was pushing it is fair.
I think though, that when I do the egr delete (which is soon) that I will change the oil cooler at the same time (as a precaution) I do think that the cooling system needs some overhaul too though.
All in all I was very impressed as to how well this truck towed this big biatch of a trailer (it weighs about 13 - 14k empty and I had full holding tanks all the way around)
One question though, what is the danger point for EGT on a 6.0? On the Dodge I felt fairly safe at over 1400 for short bursts.
Thanks all