4G54 – MITSUBISHI 2.6L B2600 CARB ENGINE

The SOHC eight-valve 4G54 (also known as the G54B) displaces 2.6 L (2,555 cc), with bore & stroke at 91.1 mm × 98 mm (3.59 in × 3.86 in). The G54B for the US market had a cylinder head with additional jet valves to improve emissions (MCA-Jet system). The engine was fitted to various Mitsubishi models from 1978 to 1997 and to the American Chrysler K-cars and their derivatives between 1981 and 1987. It was primarily set up longitudinally for use in rear-wheel drive and all-wheel drive platforms but also as a transverse engine in the front-wheel-drive platform of the Mitsubishi Magna and Chrysler K platform. Chrysler commonly marketed the engine “Hemi,” whereas the Australian-made version was marketed as the “Astron II” and featured “Balance Shaft” technology, which was subsequently licensed to Porsche and other automakers. The original engine featured a Mikuni two-barrel carburettor with a secondary vacuum actuator; later versions adopted EFI. Chrysler commonly paired this engine with its A470 3-speed automatic transmission; in Australia, Mitsubishi adapted it to a 5-speed manual transmission and its “ELC” (Electronic Control) 4-speed automatic transmission, featuring electronic overdrive. Chrysler eventually replaced the 4G54 with its own 2.5 L engine, whereas Mitsubishi replaced it with a 2.4 L engine codenamed 4G64.

Specifications:

ECI-Multi[edit]

Multi-point fuel injection

• 98 kW (131 hp) at 4750 rpm (91 RON)
• 102 kW (137 hp) at 4750 rpm (95 RON)
• 212 N⋅m (156 lb⋅ft) at 3750 rpm (91 RON)
• 220 N⋅m (162 lb⋅ft) at 4000 rpm (95 RON)
• Compression ratio: 9.2:1

Carburettor

Single two-Venturi downdraught carburettor. 85 kW (114 hp) at 5000 rpm (91 RON), 198 N⋅m (146 lb⋅ft) at 3000 rpm (91 RON). Compression ratio: 8.8:1