Sentences with phrase «duration cam lobe»
As a result, both intake valves follow a central high - lift, longer - duration cam lobe.
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The previous LS versions have extensive aftermarket support where builders talk head airflow statistics, rod ratios (connecting rod divided by stroke), cam durations, lift and lobe separation and inductions schemes.
The cam lobe profile selected for engine speeds below 3000 rpm has a duration of 214 degrees and lifts the valves 5.5 mm.
For high - speed driving, CPS switches to a cam lobe with a duration of 250 degrees and valve - lift of 10.5 mm, allowing greater air flow into the engine for high power.
In order to achieve the optimum volumetric efficiency in the lower portion of the engine's operating range, rocker arms are programmed to follow cam lobes that provide low lift and reduced duration (shorter time open with less valve lift).