Turbo cam question

Back to the LSA thing, there is another factor with the wider angle that hasn't been mentioned.
Not only does the wider LSA reduce the overlap, but it opens the exhuast valve sooner before BDC. Given that the charge is being forced in moreso than in an N/A application, the exhuast event begining sooner before BDC uses some of the expansion from the combustion to help evacuate the spent charge from the cylinder. (This is also found in supercharger/nitrous specific cam profiles)
The tradeoff with this is that some of the power is bled off at the same time.
In a turbo application, this also has a secondary plus. Since the spent gasses are exiting the engine sooner after the combustion event, they're hotter, and still expanding. This aids the turbo in spooling up. Whereas with a tighter LSA, the turbo is trying to spool boost into the motor, while the intake side is being corrupted by exhuast gas reversion from the valve overlap. So you have pressure on both sudes of the turbo shaft which impeads the turbo from spooling up.