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Camshaft Information





PositionGEN I19921993199419951996Gen II1996199719981999200020012002
Exhaust Closes43º43º43º43º43º42.5º42.5º42.5º42.5º42.5º42.5º42.5º
Intake Closes91º91º91º91º91º86.5º86.5º86.5º86.5º86.5º86.5º86.5º
Exhaust Opens65.5º65.5º65.5º65.5º65.5º 82.5º82.5º82.5º82.5º82.5º82.5º82.5º
Intake Opens21.5º21.5º21.5º21.5º21.5º23.5º23.5º23.5º23.5º23.5º23.5º23.5º
Exhaust Duration288.5º288.5º288.5º288.5º288.5º305º305º305º305º305º305º305º
Intake Duration292.5º292.5º292.5º292.5º292.5º297º297º297º297º297º297º297º
Exhaust Lift.495".495".495".495".495".541".541".542".542".542".542".542"
Intake Lift.525".525".525".525".525".541".541".542".542".542".542".542"
Valve Overlap64.5º64.5º64.5º64.5º64.5º66.0º66.0º66.0º66.0º60.0º60.0º60.0º


Talking about idle, performance, it appears that cams haven't changed drastically over the years. In addition to significant engine upgrade in 1996, engine pistons were changed in 2000 to cast from forged. Apparently this impacts these newer engines ability to run higher boost superchargers, turbos, and nitrous oxide (NOS) systems.


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