The position of the scoop will likely not be in the direct air flow. As I understand it you would need to get about 4-6 inches above the roof line to do that. You just wont likely achieve positive preassure in the air box (poor mans forced induction). It requires an awful lot of positive preassure to exceed the vacum from the engines intake. Still, you will get cool/clean air for the engine to draw from none the less. That alone is worth noteable hp.