How hot is too hot?

The higher your RPM's, the faster your fan spins. The higher your manifold pressure, the harder your engine is working. Higher RPM's and lower manifold pressure on a hard pull will result in your engine running cooler. Cleaning out the radiator is a good idea once a year. Pull the condenser without disconnecting it, pull the charge air cooler, and blow them all out separately.

 

Recently purchased 2007 T800 w/ my first Accert; didn't care at all for the high temps, especially the oil temps. Many told me to "get used to it", that I was just accustomed to my old W900 w/ single turbo temps. One day I removed the mounting bolts from condenser, and charge air, moved them where I could get between them, and went to work. First used air, with homemade extended nozzle that had a slight bend. I next sprayed some AC condenser cleaner from home improvement box store, then LOTS of water, again with a homemade extended nozzle that had a slight bend- (those things make the job MUCH easier!).
At this time, I also put one of those stainless screens in my grill, to hopefully keep the bugs out. Did this in March, or April, IIRC, and even now with ambient temps quite a bit hotter, my truck's water temp averages about 7* cooler, and in a hard pull, it not only won't heat up as much, but will cool down to normal temp quicker. Need to compare my dash gauge against a heat gun for accuracy, but average water temp appears to be about 205*.
In all honesty, all the cleaning didn't seem to do a thing for the oil temps, 225* during a hard pull, is about the warmest. Would like to have cooler though.