Mitsubishi Sirius engine

Sirius is the name of one of Mitsubishi Motors' four series of straight-4 automobile engines, along with Astron, Orion, and Saturn.

4G61

The 4G61 normally displaces 1.6 L, but there are two distinct variations: An earlier version uses 3.03x3.39 in bore and stroke, while a later one has moved to 3.24x2.95 in. This engine was always DOHC 16-valve and used either ECFI or MPFI fuel injection. A turbocharged version was also produced for the Mirage. The 4G61 does not have balance shafts like the other 4G6x motors. Instead, it has different components, some of which can be used on the "Silent Shaft" motors.

Applications:

* 3.03x3.39
o 1989 Mitsubishi Mirage ECFI
o 1989-1990 Dodge Colt MPI
* 3.24x2.95
o 1990-1992 Mitsubishi Mirage MPFI



4G62

The larger 1.8 L 4G62 was an SOHC 8-valve unit for longitudinal RWD/4WD use. With a 3.17x3.46 in bore and stroke, it displaces 1795 cc.

Applications:

* 1988 Mitsubishi Cordia
* 1988 Mitsubishi Tredia


4G63

The 4G63 was a 2.0 L (1997 cc) version. Again, there were two different bore and stroke versions, and both SOHC and DOHC were produced. It is found in various Mitsubishi models including the Eclipse and Galant but also appears in Chrysler-branded versions of the Eclipse: the Eagle Talon and Plymouth Laser.It comes with either 6 (pre 92.5) or 7-bolt cranks.

Note that the 4G63 block in the Eclipse and Galant (and other Mitsubishi and Chrysler passenger cars) is not identical to the 4G63 block found in the Mitsubishi Mighty Max and Dodge Ram 50. The car-bound 4G63 has a bore and stroke of 3.35 in (85 mm) and 3.46 in (88 mm), whereas the truck 4G63 has a bore and stroke of 3.31 in (84 mm) and 3.54 in (90 mm).

Output for the US-spec 2004 Mitsubishi Lancer Evolution is 271 hp (202 kW) at 6500 rpm with 273 ft·lbf (370 N·m) of torque at 3500 rpm. It has a cast iron engine block and aluminum DOHC cylinder heads. It uses MPI multi-point fuel injection, has 4 valves per cylinder, is turbocharged and intercooled and features forged steel connecting rods.

In the United Kingdom, a special Lancer Evolution, the FQ-400, produces 302.13 kW (405.2 hp), from a 4G63 engine. At 202.9 hp (151.3 kW) per liter, it has possibly the highest specific output per liter of any production engine.


Racing

Its turbocharged variant, 4G63T (also sometimes referred to simply as the 4G63), has powered Mitsubishi vehicles in World Rally Championships for years in the Galant VR-4, Lancer Evolution, Carisma GT and Lancer WRC04. It was the powerplant of the Lancer Evolution when Tommi Mäkinen won his four sequential WRC championships. The engine is also used in a variety of turbocharged 2-liter models of Galant and Eclipse.

Applications:

* 3.31x3.54 SOHC 2-barrel carburetor
o 1988-1989 Mitsubishi Mighty-Max
o 1988-1989 Dodge Ram 50
* 3.35x3.46 SOHC carburetor
o 1988 Mitsubishi Cordia
o 1988 Mitsubishi Tredia
* 3.35x3.46 SOHC MPFI
o 1988-1992 Dodge Colt Vista
o 1989-1992 Mitsubishi Galant
* 3.35x3.46 DOHC MPFI
o 1989-1992 Mitsubishi Galant
o 1990-1999 Mitsubishi Eclipse
o 1990-1994.5 Plymouth Laser
o 1990-1999 Eagle Talon
* Mitsubishi Starion (Australia)



4G64

The longitudinal 4G64 was the largest variant, at 2.4 L (2350 cc). Early models were 8-valve SOHC, but a later 16-valve DOHC version was also produced. All used MPFI with a 3.41 in (86.5 mm) bore and 3.94 in (100 mm) stroke.

The version used in the Chrysler Sebring/Stratus coupes produced 147 hp (110 kW) at 5500 rpm with 158 ft·lbf (214 N·m) of torque at 4000 rpm. The Chrysler version features fracture-split forged powder metal connecting rods.

Applications:

* 1988 Mitsubishi Galant
* 1988-1990 Mitsubishi Van
* 1990-1992 Mitsubishi Pick-Up
* 1990-1992 Dodge Ram 50
* Mitsubishi Eclipse/Chrysler Sebring/Dodge Stratus


4G67

The 16-valve DOHC 4G67 displaced 1.8 L (1836 cc).

Applications:

* Mitsubishi Mirage



4G69

The 4G69 is a 2.4 L (2378 cc) version built in Shiga, Japan. Bore is 87 mm and stroke is 100 mm. Output is 160 hp (119 kW) at 5750 rpm (162 in the Lancer) with 162 ft-lb (289 N·m) of torque at 4000 rpm. It has an cast iron engine block and aluminum SOHC cylinder heads. It uses MFI fuel injection, has 4 valves per cylinder with roller followers and features forged steel connecting rods, a one-piece cast camshaft, and a cast aluminum intake manifold. Applications:

* 2005 - Present Mitsubishi Eclipse
* 2004 - Present Mitsubishi Lancer (Available only with the Ralliart Trim Package)
* 2004 - Present Mitsubishi Galant
* 2004 - Present Mitsubishi Outlander