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a few suggestions,
1. valve seals installed wrong
2. restricter fitting at turbo is wrong size
3. pcv/vacuum failure is sucking oil from crank case
4. oil drain for turbo is wrong/blocked
You need to find out what the smoke is (is it oil?) and see if any is inside the combustion chamber (do the plugs get oil on them. Do the top of the pistons look oily. Is the exhaust manifold / outlet coated in soot from burning oil before the turbo - or do you see it after the turbo). Or do you find it in the intake/intercooler/pre-turbo.
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