I've been kicking the idea around of modifying the intake by installing a hood scoop for ram-air affect. On the back side of the Y-duct, why not remove the plate and install an adapter/duct which would run-up from the back side through the hood into a ram-air hood scoop. A filter would need to be attached to the Y-housing and then from there attach a short but large diameter duct from the filter. The hood scoop would be a diverging scoop to increase the air flow but once the airflow goes below the hood in order to increase static pressure you would have a diffusing duct.
Of course in order to lift the hood, you'd need separation from the duct attached the filter and the diffusing duct from the hood. This is a simple fix by adding a seal on one side so when the hood is closed the flange on the filter duct would mate with the seal on the diffuser duct.
Can you imagine the increase in airflow into the intake at speeds about 100 mph....
You would definitely get a greater amount of impact air going into the supercharger.
Any thoughts out there?