I'm not convinced about porting wastegates. The whole purpose of a wastegate is to maintain a pressure drop across the turbine wheel. If you drop the drive pressure then the turbine isn't doing as much work. A wastegate only needs ported for more/better flow when it can't keep boost down at higher rpm.
But what I think is important and maybe what Gerg is getting at is merging the wastegate gas flow back into the main flow. If done wrong this can bump up your turbine exit pressure which also bumps up drive pressure.
But what I think is important and maybe what Gerg is getting at is merging the wastegate gas flow back into the main flow. If done wrong this can bump up your turbine exit pressure which also bumps up drive pressure.