SPARK IGNITED PRECHAMBER CONVERSIONS

		NVWT fuel storage before
Napa Valley Wine Train Engine #73 during refurbishment
			NVWT fuel storage after
Remanufactured EMD Roots-blown 12-645 E before conversion		EMD Roots-blown 645 12 cylinder being converted to spark-ignited prechamber

Picture engine left bank side

Picture of ignition coil

Picture under the valve cover showing gas injectors etc.

Movie clip test running engine at idle