Cowl induction

the amount of pressure is dependant on vehicle speed. HP numbers really are not what determines the size. It's as big a hole as you can get it. So the maximum pressure is pushing the air in. As long as the entry to the carb is the same size (no smaller) as the carb neck, it will only help to have the biggest duct opening at the cowl you can fit.

BTW, rain will move up too, if it's pushed hard enough..lol.