A base Ford Zetec-SE 1.25 L engine was modified to utilize one of the four cylinders. The aluminum cylinder head is equipped with fixed dual overhead cams with twin intake and exhaust valves. The engine bore of Ø71.9 mm, equipped with flat-top piston, with the stroke of 76.5 mm provided 0.31 L of displacement and a compression ratio of 10:1. The piston was modified to include a fused silica disc insert of Ø48.5 mm for optical access. The cylinder head is equipped with port fuel injection and a centrally mounted gasoline direct injection. |