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We made the move to a solid roller cam from Comp. A roller is designed for fast valve action, and toys with spring loads that would wipe a flat tappet in a heartbeat. We upped the ante a bit with our solid roller, stepping up to Comps' Xtreme Energy Street Roller profiles, using lobe numbers 4874/4875 on the intake and exhaust, respectively. The cam specs out at 280/286-degrees of advertised duration, and checks in at 242/248-degrees at .050-inch tappet rise. We had the cam ground on a 112-degree lobe separation, the same as our hydraulic.