Yes To a point,(BTW evans is the shizzel ) to much duration on a boosted car will hinder performance, duration is good as long as there is little to NO overlap, and with most cams that carry a long duration you get overlap, Overlap can be dialed out with adjustable camgears but on a set of NA cams if you were to dial out all the over lap you would be left with a cam that would be as good if not worse than any OEM cam on the market, High lift "lower" duration is a optimal cam choice of forced induction setups, take a look at some NA cams and there specs and then look at some Turbo cams and specs, the lift will be there, but duration will be less.