What is a Fast Bleed Hydraulic Lifter?

Part of engineering a hydraulic lifter is to determine what its "Bleed Rate" will be. The "Bleed Rate" is a scientific method of determining the time it takes the hydraulic lifter to lose its pressure once it is fully pumped up solid with oil. By changing this rate, the lifter can give different performance factors to the engine. One such design is the Crane Cams Fast Bleed Lifter. Its increased bleed rate enables it to provide improved vacuum, increased cylinder pressure and performance in the lower RPM ranges. It is best suited for those engines that are using a big camshaft profile that requires more compression ratio than the engine actually has. This situation would normally cause a loss of "bottom end" performance, but with the Crane Cams Fast Bleed Lifter the bottom end torque is restored.

NOTE: Fast Bleed Lifters are only for use if the compression ratio is below the recommended minimum shown on the application page for the particular camshaft you have selected.