If you compare a hydraulic-roller camshaft to a flat-tappet hydraulic cam with similar duration at 0.050-inch numbers, the hydraulic-roller cam will always have a longer seat time.

Hydraulic Breakthroughs. Hydraulic roller cams have come a long way in recent years, and the thought of production engines like the LS7 that turn 7,000 rpm with a 100,000-mile warranty was ...

Some swear by flat tappet camshafts while others who made the switch to roller will never go back. 0:00 / 0:00 We’re going to present you with the facts and you can decide what’s best for your ...

The old flat tappet and new hydraulic roller cams may look similar, but they function very differently. The old cam specs were 238/248 (at 0.050) with lift of 0.550/0.570 on a 112 LSA.