4G63

The Mitsubishi Sirius or 4G6/4D6 engine is the name of one of Mitsubishi Motors automobile engines, along with Astron, Orion, and Saturn.

The 4G6 gasoline engines were the favoured performance variant for Mitsubishi. The ''4G61T'' powered their Colt Turbo, while the ''4G63T'', first introduced in the 1980 Lancer EX 2000 Turbo, went on to see service in the Sapporo and Starion coupés during the so-called "turbo era" of the 1980s, before creating for itself an illustrious motorsport heritage as the powerplant under the hood of the World Rally Championship-winning Lancer Evolution. A UK-market Evo known as the FQ400 had a version of the ''Sirius'', making it the most powerful car ever sold by Mitsubishi.

The 4D6 diesel engines supplemented the larger 4D5. Bore pitch is 93 mm.

4G61 (1.6 liters)

The 4G61 displaces with bore/ full length stroke of . This engine was always DOHC 16-valve and used either Multi-point (MPFI) or Electronic Control (ECFI) fuel injection. A turbocharged version was also produced for the Mirage and Lancer. Unlike the other Sirius motors, the 4G61 does not have balance shafts.

Performance

* 4G61 at 6100 rpm.
* 4G61T (USA/Canada only) at 6000 rpm and of torque at 3000 rpm.
* 4G61T (Japan, early) at 6000 rpm and of torque at 2500 rpm.
(late) at 6000 rpm and of torque at 2500 rpm.

Applications

* 1988–1992 Mitsubishi Mirage / Mitsubishi Colt (MPFI)
* 1988–1992 Dodge Colt / Plymouth Colt
* 1988–1992 Eagle Summit
* 1992–1995 Hyundai Elantra

4G62 (1.8 liters)

The larger 1.8 L 4G62 was an SOHC 8-valve unit for longitudinal rear-wheel drive and all-wheel drive use. With a bore and stroke of , it displaces . It was available either in carburetor form, multi-point fuel injection, or ECI Turbo as found in the Lancer EX 1800GSR or 1800GT, and Cordia GSR.

Applications

* 1980–1987 Mitsubishi Lancer EX 1800GSR or 1800GT (A175A)
* 1981–1986 Mitsubishi Delica/L300/Express
* 1983–1987 Mitsubishi Chariot HR
* 1983–1989 Mitsubishi Cordia
* 1983–1989 Mitsubishi Tredia
* 1984–1988 Mitsubishi Galant/Eterna

4G62T

Turbocharged version of the 4G62

4G63/G63B (2.0 liters)

The 4G63 was a version.

Bore x stroke is SOHC and DOHC were produced. Both versions were available in either naturally aspirated and turbocharged form. For front-wheel drive applications, the turbocharged Sirius' name was changed to "Cyclone Dash". As fitted to the fifth generation Galant JIS gross were claimed - the output claims later shrank to - for the turbocharged and intercooled "Sirius Dash 3x2 valve" engine. This version could switch between breathing through two or three valves per cylinder, to combine high top-end power with low-end drivability as well as allowing for economical operation. It was a modification of Mitsubishi MCA-Jet technology which used a secondary intake valve to inject air into the engine for more efficient emissions control. The DOHC version was introduced in 1987 in the Japanese market Galant, and came in turbocharged or naturally aspirated form. It is found in various models including the 1988-92 Mitsubishi Galant VR-4, the U.S. market 1990-1999 Mitsubishi Eclipse, and the Mitsubishi Lancer Evolution I-IX. Later versions also received Mitsubishi's variable valve timing system, MIVEC.

A SOHC carbureted eight-valve version (engine code G63B) was also available in Mitsubishi's pickup trucks (L200, Strada, Mighty Max, Dodge Ram 50) from the eighties until the mid-nineties. It produces at 5500 rpm in European trim (1989). The SOHC version was also used in Mitsubishi Galant models until 1993. It has of output and of torque at 4,750 rpm.

Also, a SOHC version was produced until the late 90s and early 2000s and was used in Mitsubishi cars like the Montero and the 2.0 L 2-door Pajero with an output of at 4700 rpm. Also the N33 and N83 Space Wagons and Galant (UK market) received the 4G63, in single-cam sixteen-valve format. A similar version, with , was also used in some light duty Mitsubishi Canters from 1997 on.

The Mitsubishi Eclipse, Eagle Talon and Plymouth Laser introduced the DOHC turbocharged intercooled version to the U.S. in 1989 through Diamond Star Motors, a joint venture between Mitsubishi Motors and the Chrysler Corporation. From 1990 to late April 1992 came thicker connecting rods and the use of six bolts to secure the flywheel to the crankshaft; May 1992 to 2006 Evolution versions have lighter rods and use seven bolts to secure the flywheel to the crankshaft. They are referred to as the "six bolt" and "seven bolt" engines, respectively.

Output for the 2003 US Mitsubishi Lancer Evolution is at 6500 rpm with of torque at 3500 rpm. It has a cast iron engine block and aluminium DOHC cylinder head. It uses multi-point fuel injection, has four valves per cylinder, is turbocharged and intercooled and features forged steel connecting rods.

The final version of the engine was found in Lancer Evolution IX. It was equipped with Mitsubishi's variable valve timing system, MIVEC. This version also had a revised turbocharger, extended reach spark plugs, two-piece rings.

A SOHC 16 valve turbocharged version called 4G63S4T is produced by Shenyang Aerospace Mitsubishi Motors Engine Manufacturing (SAME) in Shenyang, China, producing a peak power of and a peak torque of for most applications, and rated in some applications. This version is equipped with a TD04 turbocharger.

Racing

Its turbocharged variant, G63T (also sometimes referred to simply as the 4G63), has powered Mitsubishi vehicles in World Rally Championships (WRC) for years in the Lancer EX 2000 Turbo, Galant VR-4, Lancer Evolution, Carisma GT, and Lancer WRC04. It was the powerplant of the Lancer Evolution when Tommi Mäkinen won his four consecutive WRC championships in his Lancer. MHI and T-4 turbos were both used as power for these engines. A 1.7L variant of the 4G63 was also used in a custom made hill-climb McLaren F1(Known as McLaren F1 Evo) made by Komvet Racing.

Applications

* 1980–2003 Mitsubishi Galant
* 1981–1987 Mitsubishi Lancer EX 2000 Turbo
* 1982–1987 Mitsubishi Starion
* 1983–1992 Dodge Colt Vista
* 1983–1998 Mitsubishi Chariot
* 1983–1989 Mitsubishi L200/Mighty Max
* 1985–1998 Mitsubishi Delica
* 1983–1988 Mitsubishi Cordia
* 1983–1988 Mitsubishi Tredia
* 1990–1999 Mitsubishi Eclipse
* 1992–2007 Mitsubishi Lancer Evolution
* 1993–1998 Mitsubishi Pajero
* 1994–1998 Mitsubishi RVR
* 1997–2000 Mitsubishi Canter
* 2002–200? Mitsubishi Lancer
* 1999–2005 Mitsubishi Dion

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