but 2 difrent compression ratios? where is crossbow with his manual cause now this is gonna eat away at me.ZoomZoomH said:it's the same engine design worldwide, just with different tuning for each region's fuel/emission requirements.
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still searching...Cylinder head construction is of aluminum-silicon alloy - thermally treated for strength and durability after the casting process - with an asymmetrical, four-valves-per-cylinder design. Two inlet valves (32.5-mm for the 1.8-liter; 35 mm for the 2.0-liter and 2.3-liter) are positioned at 19 degrees, and the two exhaust valves (28 mm and 30 mm, respectively) are positioned at 20 degrees. The compression ratio for the family of 4-cylinder engines varies from 9.7 to 10.8 depending on displacement and market.
Displacement variations for Mazda's new family of engines are achieved by increasing bore size (87.5 mm for the 2.0-liter versus 83.0 mm for the 1.8-liter) while keeping the common stroke length of 83.1 mm for the 2.0-liter and 1.8-liter. The stroke for the 2.3-liter with S-VT is 94 mm.
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