Good thoughts guys. Most of the answers are in my build thread. Down shifting to 3rd really does not help that much. I think it’s pretty much hosed by then. I made it to the top but the water temp really did not drop. Top of the list is timing. My meter is a dti tech time. It has worked well in the past but the last couple times I’ve used it, I have not seen the pump timing behavior I’d expect. I see less timing at low rpm rather than the advance coming out at 2k. I saw that once before with my other pump too. If someone has any thoughts on that, I’d love to hear them. I am currently pulling the turbo water from the back of the drivers side head. I did put a restrictor in that line because it seemed possible I was robbing too much water from the head. I am running a coolant filter as well. I know my heat load is more than stock but my camper is not that heavy. I weighed the whole rig first time out and truck and trailer with enough tools for a full engine swap and rebuild (those who remember that rally will know why I did that) was only ~12,500. I might be 13000 gross now with the generator and the extra battery but I doubt it.