if its TD then yeah.

pretty much in the way percy and zippy said, plus what me n alex said.

more fuel as all diesels run MEGA lean as people think black smoke is bad.

decent exhaust, filter, intercooler like any turbo car.

more boost once youve got to the point where there too much smoke (or too high EGT) for your liking.

bigger turbo once adding more fuel and boost isnt doing much.

charge temp gauge, boost gauge, and EGT gauge, they all pretty important, EGT especially.