Nah, it would cool the air after the blower. Search for a picture of a Ford Thunderbird Supercoupe engine bay. In the case of that car the charge is pushed out through the top of the blower, to the front of the car and then back to the engine. To me it makes no sense to do this unless water to air isn't feasible. It's like saying, "why not put a smaller supercharger on the engine just to see what the gains would be". In this case we already know the air to air would be less efficient while introducing other issues such as MAF placement and a delay in throttle response. Both are addressable but again, why bother? You know?