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Less engine life is a trivial amount, if it gets taken care of. Oil changes, valve adjustments, and not hammering on it when it's less than operating temp. That truck in the videos is still like that, shifts at 2900, and no load will rev to 3050, just from tightening the springs. The shim method...

Yep, quote easy to turn em up, I even made a video on how to do it, on youtube. Bosch MW pump fuel rate adjustment (DT360, DT466, Ford 6.6 & 7.8, and a few others) - YouTube and tighten the gov springs fro a couple hundred more rpm: how to tighten gov springs on BoschMW on DT466 - YouTube

Post up some numbers off the pump, they tell a lot.

That means you have to do it, and report the happy results

I can tell you about what it does to a DT466 with nearly the same pump. I did a #0 plate, tightened the gov springs, and hiked the timing to 22*. Keep in mind, this truck weighs just over 27k pounds in the vids, so it wont seem too fast. I do say, it will run like you think it should have from...

cool site! Yeah, the 8.3 shares nearly the same pump as a 5.9. Not all do, and that's where you need to look. Make sure it's a P-pump, and not the electronic junk. Mods are simple. Grind down the fuel plate flat, and install it full forward. Hike up the timing to around 17-19*, and buy a set of...