Why do LS7 Pistons have Valve Reliefs?
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Valve events for the stock LS7 camshaft (IO 11 degrees after TDC, EC 9 degrees before TDC) indicate that valve reliefs are not strictly necessary. Why then do LS7 pistons have valve reliefs? I see two possible reasons. To provide a safety margin in case of valve float or as a convenience because GM expects that a larger camshaft may eventually be desired. Does anyone here know more about this? I’m just curious and wondering.
Last edited by Gary Z; 01-05-2008 at 04:02 PM.