Mitsubishi Sirius engine

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

Contents

[edit] 4G61

The 4G61 displaces 1595 cc. 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" engine.

Applications:

[edit] 4G62

The larger 1.8 L 4G62 was an SOHC 8-valve unit for longitudinal rear-wheel drive and all-wheel drive use. With an 80.6 x 88.0 mm bore / stroke, it displaced 1795 cc.

Applications:

[edit] 4G63

The 4G63 was a 1997 cc version. There were two different bore and stroke versions, SOHC and DOHC were produced. The DOHC version came turbocharged or naturally aspirated. It is found in various Mitsubishi models including the 1990-1999 Eclipse and Galant.

The Mitsubishi Eclipse, Eagle Talon and Plymouth Laser introduced the DOHC turbocharged version to the U.S. through the Diamond Star Motors joint venture between Mitsubishi Motors and the Chrysler Corporation (now DaimlerChrysler). 1990 to late April 1992 came with beefier rods and used 6 bolts to secure the flywheel to the crankshaft, May 1992 to present EVO versions have lighter rods and use 7 bolts to secure the flywheel to the crankshaft. They are referred to as the "six bolt" and "seven bolt" engines, respectively.

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 head. It uses MPI multi-point fuel injection, has 4 valves per cylinder, is turbocharged and intercooled and features forged steel connecting rods. With the release of the Lancer Evolution IX (286hp @ 6500rpm, 289ft*lb of @ 3500rpm, 7000rpm redline), it has received Mitsubishi's MIVEC variable valve timing system, which gives smoother power delivery and a flatter torque curve.

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.



[edit] 4G67

The 16-valve DOHC 4G67 displaced 1836 cc.

Applications:

[edit] 4G69

The 4G69 is a 2378 cc version built in Shiga, Japan. Bore is 87 mm and stroke is 100 mm. Output is 162 hp (119 kW) at 5750 rpm (160 in the Sportback Wagon) with 162 ft·lbf (219 N·m) of torque at 4000 rpm. It has a 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. The 4G69 incorporates Mitsubishi's MIVEC Variable Valve Timing technology. Applications:

NB: From 2005 - A slightly detuned version (115kW, 220Nm) is used across the entire Lancer range in Australia.

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