pcv sucking oil ?

Some cheap aftermarket valve covers do not have a baffle under the PCV valve and allow an excessive amount of oil vapor to be pulled into the PCV system. Under hard acceleration your cylinder pressure goes up - therefore more blow by and more oil vapor to be pulled into the PCV. If it is a fresh engine it is entirely possible the rings are not seated yet. As was stated before, pull out the PCV valve and let it hang on the hose, then go for a drive and see if the smoke is still there. The crankcase will just vent to atmosphere, not a problem for a short while. If you still have the smoke on hard acceleration you have an excessively rich condition probably caused by an incorrectly adjusted accelerator pump, or float levels too high and the fuel sloshes back in the primary side on acceleration causing an over rich condition.