Hydraulic Roller Tappet Camshaft

The Lunati 51012 is a hydraulic roller tappet camshaft engineered to optimize engine performance across a specific power band. Its specifications include advertised durations of 290 degrees on the intake and 300 degrees on the exhaust, with durations at 0.050 inch lift measuring 232 degrees intake and 242 degrees exhaust. This camshaft is designed to function effectively within an operating RPM range of 2,800 to 6,500. Further details of the Lunati 51012 camshaft include a lobe separation of 112 degrees. With a factory rocker arm ratio, the valve lift is 0.544 inches for the intake and 0.560 inches for the exhaust. The valve lash for both intake and exhaust is set at 0.000 inches. Adjustable pushrods or adjustable rocker arms are highly recommended, and a longer pushrod may be necessary when using 0.474 inches or more lift. Selection of a camshaft is a critical process that impacts peak horsepower, the engine's effective power band, idle characteristics, and available engine vacuum. The Lunati 51012 camshaft is noted for its suitability for street rods or pro-street applications and requires specific supporting modifications for optimal performance. It is recommended to have a 3000 RPM stall converter, headers, a compression ratio of 9.5:1 or better, and 3.90 gearing. Additionally, custom cams and head porting are advised for peak performance, along with good valve springs to prevent float.