Mercedes-Benz M113 engine
The Mercedes-Benz M113 (and similar M155) engine is a gasoline-fueled, spark-ignition internal-combustion V8 automobile engine family used in the 2000s. It is based on the similar M112 V6 introduced in 1998, then later phased out in 2007 for the M156 AMG engine and the M273 engine.
|Displacement||4.3 L (4,266 cc)|
5.0 L (4,966 cc)
5.4 L (5,439 cc)
|Cylinder bore||89.9 mm (3.54 in)|
97 mm (3.82 in)
|Piston stroke||84 mm (3.31 in)|
92 mm (3.62 in)
|Valvetrain||SOHC 3 valves x cyl.|
|Supercharger||AMG-developed with intercooler|
|Fuel system||Sequential fuel injection|
|Power output||279–641 bhp (283–650 PS; 208–478 kW)|
|Torque output||400–820 N⋅m (295–605 lb⋅ft)|
|Successor||Mercedes-Benz M273, Mercedes-Benz M156 (most AMG applications), Mercedes-Benz M152 (SLK55 AMG)|
The standard Mercedes-Benz M113s are built in Untertürkheim, Germany, while the AMG versions are assembled at AMG's Affalterbach, Germany plant. M113s have aluminum engine blocks and aluminum SOHC cylinder heads with two spark plugs per cylinder. The cylinders are lined with silicon/aluminum, and the heads have 3 valves per cylinder (two intake, one exhaust). Other features include Sequential fuel injection, fracture-split forged steel connecting rods, a one-piece cast camshaft, and a magnesium intake manifold.
The M113 E43 is a 4.3 L (4,266 cc) version. Bore and stroke is 89.9 mm × 84 mm (3.54 in × 3.31 in). Power output is 279 bhp (283 PS; 208 kW) at 5,750 rpm with 400 N⋅m (295 lb⋅ft) of torque at 3,000 rpm. Output for the variant used in the C43 AMG is uprated to 302 bhp (306 PS; 225 kW) at 5,850 rpm and 410 N⋅m (302 lb⋅ft) at 3,250 rpm.
The M113 5.0 is a 5.0 L (4,966 cc) version with a bore and stroke of 97 mm × 84 mm (3.82 in × 3.31 in). Power output is 302 bhp (306 PS; 225 kW) at 5,600 rpm with 460 N⋅m (339 lb⋅ft) of torque at 2,700 to 4,250 rpm. Active Cylinder Control variable displacement technology is optional.
The M113 5.4L is a 5.4 L (5,439 cc) version with the same 97 mm (3.82 in) bore as the M113 5.0 but with a longer 92 mm (3.62 in) stroke developed by Mercedes-AMG. These cars were the first to carry the 55 AMG title. Power output is 342 to 362 hp (347 to 367 PS; 255 to 270 kW) at 5,500 rpm with 510 to 530 N⋅m (376 to 391 lb⋅ft) of torque at 2,800–5,400 rpm. Many popular tuners such as Kleemann USA, Amg Affalterbach developed supercharger systems for this model, mirroring the later M113K design. 396 hp (401 PS; 295 kW) at 5,750 rpm and 520 N⋅m (384 lb⋅ft) at 3,750 rpm of torque in the SLK55 AMG Black Series.
M113 5.4 Supercharged (Kompressor)Edit
The M113 5.5L Supercharged is a supercharged and twin-intercooled version of the 5.4 L (5,439 cc) M113. It is commonly referred to as "M113K" - where 'K' stands for Kompressor (supercharger). Power output varies depending on year and model, from 469 bhp (476 PS; 350 kW) for the E55 AMG at 6,100 rpm to 574 bhp (582 PS; 428 kW) in the 2004-2006 CLK DTM AMG, with 700 to 800 N⋅m (516 to 590 lb⋅ft) of torque at 2,750–4,000 rpm. Many Mercedes-AMG enthusiasts consider the M113K was the last of the great Kompressor engines used by Mercedes-AMG excluding the Mercedes SLR McLaren. Mercedes-AMG replaced this model with their new 6.2 L naturally aspirated V8, making the transition from 55 AMG to the 63 AMG. Although the new 6.2 L M156 AMG motor produced greater peak HP, many enthusiasts were disappointed by the lack of torque present in the new N/A design.
The M155 SLR is a version of the supercharged 5.4 L (5,439 cc) M113 specifically for the Mercedes-Benz SLR McLaren. Power output is 617 bhp (626 PS; 460 kW) at 6,500 rpm with 780 N⋅m (575 lb⋅ft) of torque at 3,250 rpm. An uprated version with 641 bhp (650 PS; 478 kW) at 6,500 rpm and 820 N⋅m (605 lb⋅ft) of torque at 4,000 rpm is featured in the 722 edition.