When it comes down to it, the heavier smoking is from one thing - overfueling. Whether this is because of chip/injector mods, intake clogging, or crankcase oil from the turbo, it amounts to not enough air/too much fuel (yes, crankcase oil can be a fuel for the TDI - but you never want to see it happen!). I'd say normal is a light haze under mid to heavy accelleration. This is much easier to see at night when headlights are following.
I fyou are using taxed (non-dyed) diesel in your properly tuned vehicle, it should not smoke any heavier than a haze as described above. Running off-road (construction/ag) dyed diesel could smoke a lot more - it has tons more sulfur in it than road diesel. And it could get you in expensive trouble. Yet another reason to run BioD - doesn't smoke like DinoD...
There is something satisfying, however, in dumping a heavy, black, locomotive-like cloud on a tailgater....
I fyou are using taxed (non-dyed) diesel in your properly tuned vehicle, it should not smoke any heavier than a haze as described above. Running off-road (construction/ag) dyed diesel could smoke a lot more - it has tons more sulfur in it than road diesel. And it could get you in expensive trouble. Yet another reason to run BioD - doesn't smoke like DinoD...
There is something satisfying, however, in dumping a heavy, black, locomotive-like cloud on a tailgater....
