Again, you are telling me something with little if anything to verify it. Link me to something plz, I have only seen a top ten in DP mag and I don't remember what engines were on it nor where they placed.
A bully dog programmer and a few other things gets 550 horse? Again, what are the other things, what year is your buddies truck? Auto/manual? Stock/built/clutch? etc....
When it comes down to it, Cummins 5.9 and the Duramax have and continue to flat out dominate in racing. There is no Ford PSD powered vehicle so far that I am aware of that has gone faster than Zane Koch's 7.3 obs, best of 10.86, and that's actually not very quick compared to what the Duramax and Cummins powered vehicles have achieved up to now. It's good to be loyal to the brand you love, but you're forgetting who sits on top when making tremendous power and setting records, PSD's are in 3rd among the big 3's engines. Banks' Sidewinder Type D has run 7.72, there are also at least 2 or 3, perhaps more Duramaxes that have run lower than 10 seconds. The Scheid rail, 7.0 1/4, Jimmy and Dale Smith's 4x4 drag truck 9.75. As mentioned before, if you're gonna say something provide some back up, preferably something other than spew.