I want to think about how the turbocharger responds to ram air effect.
Seems to me that a turbocharger "connects" the exhaust and intake pressures of an engine; if the air on the intake side is compressed to 5-10 PSI, the compressor turbine is going to need more energy to spin in that environment. The compressor gets that energy from the exhaust turbine; if the compressor has to work harder putting air in the engine, the exhaust is going to have to work harder leaving the engine.
The equation is not a simple one; you have valve over lap, fuel injections, turbo geometry, and intake and exhaust temperatures to consider. But I would think that the turbocharger reduces the effectiveness of ram air. I have the hunch that their are definite benefits to be had with ram air, but I think those benefits are far outweighed by the cool air scoops would allow you to utilize.