Duration, and lots of it. Builders having been using that trick for years to "crutch" a cylinder head that doesn't flow all that great. You should read up on it. Asking for the actual dyno sheet had nothing to do with me asking about the camshaft.
It's funny to me how you always have to get nasty, with your replies. I don't think you know as much as you think you do. I certainly wouldn't listen to much of what you have to say. Is that funny enough for you? ;)