Ever since I bought this 06 I think that it is 06 now. People are already talking about the 07 trucks and how they will be different, I don't know what year it is sometimes, lol.
The question about the common rail spinning a bigger turbo, (or any turbo) faster than a 12V is fairly simple to answer. The way I found out about it was when the B-1 quick spools were out and the TST's were out they actually stopped selling B-1's for a while because it didn't matter if you ran 40 psi boost or 60 psi boost they were still blowing. The reason why was because it was just excellerating too fast and just spinning right in half.
The common rail, depending on which year you have, shoots two and three shots of diesel per stroke. A preliminarry shot, a main shot, and an emmisions shot. Okay, when you have the prelim. shot you are getting the fire rolling and it makes it easier to get the main shot completely burned. A more efficient burn meens more expansion of gases, more exhaust pressure at lower RPM, and more lower end boost. Thats why in a 12V, if you crank up the aneroid, inj. , DV's so where it fuels way too hard on the bottom it seems like you lost your bottom end, ... . well you have! Too much fuel on the bottom meens you are drowning the fire out which meens less expansion of the gases.
Okay one more. The common rail 04. 5-pressent, has the third emmissions shot. This is why the later engines get such poor MPG. It shoots a shot right before the exhaust valve opens. This in my opinion adds to EGT and creates much more expansion of gases with the explosion coming out the exhaust. Now the Third shot I don't fully understand. Why this is, I don't know, I may be way off here, but I always heard that when a diesel runs at higher EGT's, it creates more oxides of Nitrogen. Why they made the truck run hotter and get less MPG is beyond me other than the reason to get the quicker spool up of the turbo. The newer trucks definatly smoke more, even stock trucks soot up the fenders.
So, what we need from the computer genious's now is an ECM mod that will shorten the first shot so we can run bigger boxes and bigger injectors so the truck doesn't rattle to death from too high timing, (bigger prelim. shot lots = more timing and pre-dettination) and a mod that gets rid of the third shot for driving MPG.