Does it haze at idle? And cruise, as well? I can tell you a smaller turbo won't fix that. It takes about 12k rail pressure to make 200s smoke free at idle (I mean smoke free like a stock truck) with ovals. Josh is correct, it's gonna take quite a bit of fine tuning to make the ovals run clean.
No joke. I gotta mess with mine some more. mines not terrible but when I jack the rail up it lopes due to the pilot injection being so big lol.