Mitsubishi Innovative Valve Timing and lift Electronic Control (MIVEC) Aluminum is also used for the timing chain case and cylinder head cover, the latter being resin in the normally aspirated 4B11 used in other Lancer models. The 2010 Lancer Sportback Ralliart is certified to the LEV II / Tier 2, Bin 5 emissions standard. Iridium spark plugs contribute to lower emissions and help extend major service intervals. Using a timing chain instead of a belt allows for a more compact design and also helps ensure reliability. The intake tract and airbox are unique to the Ralliart, and the intercooler setup and plumbing differs slightly from the Evolution, as well. The Lancer Sportback Ralliart engine employs the same smaller, single-scroll turbocharger that is in the Lancer Ralliart sedan. Compression ratio is 9:1, same as in the Lancer Evolution. Fully floating pistons improve reliability while reducing frictional loss. The 2.0-liter (1,997 cc) engine's bore and stroke both measure 86.0 mm (3.4 in.), making it a "square" design with a bore-stroke ratio of 1.0. The pistons are gravity castings made of a high strength aluminum material designed for durability and quiet operation, and also include a unique ring package optimized for this engine. Also unique to this engine are reinforced forged steel connecting rods that are attached to pistons unique for the application. The 4B11 T/C features a cross-drilled forged steel crankshaft that rotates in 4-bolt main bearing caps. High internal rigidity helps ensure smoothness, and so the 4B11 does not use a balancer shaft. An integrated die-cast ladder frame contributes to engine block strength and also helps reduce noise, vibration and harshness (NVH) levels. Likewise, the internal components are reinforced to withstand high levels of boost. Although based on the architecture as the 4B11 naturally aspirated engine, the 4B11 T/C starts with a unique semi-closed deck block casting and is reinforced for turbocharging. The 4B11 T/C is an intercooled-turbocharged 2.0-liter DOHC inline four-cylinder engine built with a cast-aluminum cylinder block and cylinder head. As in all Lancer engines, the Mitsubishi Innovative Valve-timing Electronic Control (MIVEC) system controls valve timing on both the intake and exhaust camshafts to optimize performance at all engine speeds. The Ralliart engine's redline is 6,500 RPM compared to 7,000 RPM for the Evolution. ![]() of torque available from 2,500 RPM to about 4,700 RPM, the Ralliart engine provides a "sweet spot" that yields accessible everyday performance. of peak torque at 3,000 RPM (Evolution: 300 lb.-ft. The Lancer Sportback Ralliart engine produces 237 hp at 6,000 RPM (Evolution: 291 6,500 RPM) and 253 lb.-ft. Beginning with a Lancer Evolution long block assembly, the turbocharger, intercooler and valve timing are adapted for impressive street-oriented performance in the Ralliart application. The 2010 Lancer Sportback Ralliart is powered by the same modified version of the 4B11 T/C turbocharged and intercooled engine that debuted was featured in the Lancer Ralliart sedan.
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