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Chevrolet V-8 265-454 lifter, SBI Hydraulic High Performance lifters are 100% Rockwell tested. .842 or 27/32 dia
SBI High Performance lifters are backed with Over 20 years of Experience, Reliability, Quality, and Innovation.
SBI Performance Lifters are manufactured to a tighter tolerance than OEM lifters, which reduces lift loss due to leak down and allows full utilization of the cam event. Equaling more power.
Each SBI High Performance lifter has a precise Oil Metering System to eliminate excess oil to rocker arm at high RPM’s. All performance lifters have a Hardened Steel Snap Ring design as added strength over standard wire clips.
TO BE USED AS A GUIDE ONLY - Application Must Be Verified
SBI International Hydraulic Valve Lifters
The basic function of a hydraulic lifter is to ride up and down on the cam lobe and open the valves when the cam rotates. Sounds simple doesn't it? Wrong !
The hydraulic lifter is one of the most complex components of an internal engine, with a multitude of moving parts with the main purpose of maintaining zero lash. When the camshaft is at the beginning of lift, all the lifter internal components are in the zero-lash position. The check ball is seated and has sealed the high pressure chamber. Starting valve lift cycle (where the camshaft pushes the lifter up), the valve spring applies force on the lifter, which slightly depresses the internal components. Then, a controlled leak-down occurs: An internal spring pushes the internal components firmly against the push rod to remove any lash in the system, after which the process starts all over again.
Advantages to SBI International Hydraulic Valve Lifters:
- No assembly lash adjustments are required.
- Automatic thermal expansion / contraction adjustments.
- No service or wear lash adjustments are requires.
- No valve gear noise caused by component impact during the removal of lash clearance.
- More accurate valve timing which yields better emissions, fuel consumption, vacuum levels and torque.
- Decreased recession of valve seats.