Solid, Hydraulic, Roller, Non-Roller... Pros and Cons

[MiracleMax]

What advantage does a roller cam have over a flat tappet cam. Properly ground, a roller will have more aggressive ramp rates which translates into quicker opening and closing events.

Typically where a roller shines over a non roller in a street application is fatter torque with the same or better peak hp (providing of course both cams, roller and flat-tappet where designed to do the same thing)

Seems to me that most hydrualic rollers are about as aggressive or maybe a bit more aggressive than a typical solid tappet cam. The down side is a lower redline, the lifters a pretty heavy for a hydraulic roller so it becomes a balancing act. If your considering an engine that is designed to operate below a 7,000 rpm redline, then a hydraulic roller is not a bad choice. Especially if your flirting with a 6500 rpm redline. Comp cams is supposed to have a hydraulic roller lifter capable of higher than 6500 rpm operation?