Vtec???where??

When I am revving high and the Vtec is supposed to be kickin in I dont feel much at all. I was staying away from doing the ol' IHE. Because I wanted to get a new(faster) engine but right now I need something to for a little more power and the guy at the shop down the street sayed that if I get a CAI that will help strengthen my Vtec pull(and sound better), is this true or should I just save my money for my ITR swap????