115 ... if he had a lower set of gears. Dont forget those diesels only rev to about 3300 Rpms max.... (most of them)... i've never been able to see 100 with a 2002 F350 Supercab Long Bed on 34's w/ a 78mm Turbo, Superchips, (manual trans), Intake, Full Banks Exhaust. It would get to 90 quick as hell, but with the stock gearing, 3100rpm at 90 at 22 lbs of boost... 100 was not likely.

 

Interesting info I found on the Dmax from the early 2000's

http://www.duramaxdieselspecs.com/lb7.html

So either way this just says my truck is slow!! haha