Electric supercharger...
Don't laugh...
I know the thought of one giving any gains on a car engine is ludicrous, given the demands for air of a larger displacement internal combustion engine.
What about on a small displacement, lower power engine though? If it could pressureize the airbox, it should be able to keep up for short periods of time. It would not be restricting like something mounted in the intake tube, and if it failed, it is mounted pre-filter.
1985 Honda Big Red 250ES
27x12-10 Mud Bug rear tires on ITP aluminum rims
27x10-12 Mudlite on front
*****************************************