I have to brag a little bit on my old girl. I used to dislike towing with it because I had to turn the power down to stock and watch my speed to keep it from warming up. Not anymore.
I finally had enough of it using coolant when I beat on it.
She recently got re-man fleece heads, ppe manifolds, up pipes, and down pipe, head studs, new oil cooler and an all aluminum radiator (don't know brand, took it off a customer's truck because his trans failed. He didn't want it back so on my truck it went. Zf6 ftw)
This thing is a different animal. More power and it runs 180* no matter the tune. On our first little trip I realized I never soldered the dsp5 wires back together from when I pulled the cab. Tony's tunes default to the big one so I never noticed till I went to turn it down after hooking up. It did flawlessly. Next trip I just left it on 5. Really put it to the test passing on a 2 lane. 5th gear WOT run from 55 to 85 to pass a couple cars. Egt's just kissed 1500* and coolant got up to 190*. And I average 12mpg with it on both trips! Which isn't much worse than my 6.7 Ford gets empty.
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