Simply adding 0.10 points of compression or so isn't going to do squat, really. Hell, a full point of added compression does very little. As with any modifications, they have to work together, as in: you don't just throw hotter cams in an other wise stock head because you won't have huge gains. You add to that headwork. Then, you have to make sure your intake, intake manifold, and exhaust manifold flow better, too. All has to work together.