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Following this we popped on the timing chain. Notice that the single dot on the lower gear is lined up with the dot on the larger cam gear. This indicates the cam is neither advanced or retarded. By repositioning the lower gear you can advance or retard the camshaft timing events. Advancing the cam by a few degrees will lower the powerband and favor torque, retarding the cam will raise the powerband and favor horsepower. Whenever moving the cam you must check piston-to-valve clearance.