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Overlap is one of the most interesting aspects of cam operation. This graph illustrates the time, in degrees, when both the intake and exhaust valves are simultaneously open. More overlap decreases low-speed torque but helps top-end power.
Cam Packed

Overlap is one of the most interesting aspects of cam operation. This graph illustrates the time, in degrees, when both the intake and exhaust valves are simultaneously open. More overlap decreases low-speed torque but helps top-end power.  View Related Article

 

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