I've been told by quite a few reputable sources that you can see decent gains by either advancing or retarding your stock cam on a stock bolt-on car? I'm looking for hard data from people that have actually done it, not, "My buddy did it, and he ran pretty good" or, "get a new cam, or a custom cam, your wasting your time", I know a "different" cam would undoubtedly be better, thats not my question, anyone?
Don't want to sound arrogant, it's just that I need quick, accurate advice.
