Ignition timing
the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke
en-US/ˌɪɡˈnɪʃən ˈtaɪmɪŋ/
en-GB/ɪɡˈnɪʃn ˈtaɪmɪŋ/
the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke