blah I'll be setting all you hydraulic nay sayers straight very very soon :devil: Don't cry when I start turning some solid roller RPMs with a hydraulic roller cam. Too much spring... not really such a thing. There is HOWEVER power to be gained with a lighter valvetrain and less spring pressure. You get less damaging harmonics in the valvetrain if you design it right. You can *most of the time* fix a poorly designed valvetrain with overspringing it. Don't expect the best life out of any of the components, and don't expect to beat the guy with the right package.