A little more testing yesterday with the trailer in tow. Glare was bad as I was driving out of a rainstorm and into the sun.
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This was pulling a small grade at about 65 mph.
I came to a steep pull that I should have cruised right up, but traffic starts slamming on the brakes for a guy pulling a trailer way too slow and not getting over into the 2 Lanes to his right. So I accelerated up and passed him. It was an OBS Powerstroke pulling a small aerodynamic trailer. Not sure why he was going that slow.
This move got the EGTs a little higher than I'd like, but it was only there for a few seconds.
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I'm posting these because I have a few ideas about improving the system and want to be able to show what a bare-bones install is doing. A 130F degree drop is pretty good in my book, but I have a few experiments in mind to get the "Approach" closer to ambient. It will be interesting to see.
I've found "Approach" defined as the difference between ambient and final I/C outlet temperature.
Much of the research I have been doing centers around asking why Ford engineers choose to use this system on the new 6.7l diesel trucks.