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Mitsubishi 6G "Cyclone V6"
Manufacturer Mitsubishi
aka Type aka here, not up there
Type Gasoline
Production/Introduction 1987-Present
Status "In Production"
Displacement 2.0L-3.8L
Aspiration Normally Aspirated or Turbocharged
Configuration V
Cylinders 6
Fuel System Fuel Injected
Lubrification indicate the engine's type of lubrification
Output N/A hp @ N/A rpm
N/A lb-ft. of torque @ N/A rpm
Bore in inches
Stroke in inches
Compression 8.9:1
In. Valves in inches
Ex. Valves in inches
Firing Order 1-2-3-4-5-6
Left Bank Write which cylinders are in this bank (write N/A if it it is inline)
Right Bank (same as above)
Length in inches
Diameter in inches
Width in inches
Height in inches
Dry Weight lbs. / kg.
Fuel Consumption city/highway (mpg & km/L)
Emission/s CO: {{{CO}}}
CO2: {{{CO2}}}
NOx: {{{NOx}}}
Hydrocarbon: {{{Hydrocarbon}}}
Particulate: {{{Particulate}}}
Chief Engineer write here

The Cyclone V6 engine is a series of V6 piston engines from Mitsubishi Motors. Five displacement variants have been produced with both single- and double- overhead camshaft layouts. MIVEC variable valve timing has also been implemented in some versions, and the 2.5 and 3.0 L versions were also available with gasoline direct injection. Modern versions feature a one-piece cast crankshaft and cast aluminum intake manifold.


The 6G71 is a 2.0 L (1998 cc) version with a 74.7x76 mm bore/stroke. It produced 88 kW (120 PS) at 5500 rpm and 172 N·m (127 ft·lbf) at 4500 rpm.



The 6G72 is a 3.0 L (2972 cc) engine. Bore is 91.1 mm and stroke is 76 mm. SOHC 12-valve, SOHC 24-valve, and DOHC 24-valve versions have been produced.

The latest version was used in the Eclipse and Galant. Output in 2004 was 210 hp (157 kW) at 5500 rpm with 205 ft·lbf (278 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 four valves per cylinder with roller followers and features fracture-split forged steel connecting rods. A twin-turbocharged variant of this motor is used in the 3000GT VR4/Dodge Stealth R/T, producing 321 hp (325 PS) at 6000 rpm & 315 lb·ft (427 N·m) of torque, available as early as 2500 rpm. In the older version, used in many Chrysler models since 1987 this V6 was a SOHC 12-valve developing 141 hp (105 kW) at 5000 rpm and 172 ft·lbf (233 N·m) of torque at 3600 rpm



The 6G73 displaced 2.5 L (2497 cc or 152 cid). It was produced in a 24-valve SOHC or DOHC design, with 2 valves running off one cam lobe in the later. It has a smaller bore than the 3.0 liter version of the same block. Bore and stroke were 3.29in. x 2.99in. (83.5mm x 76.0mm), with a 9.5:1 compression ratio respectively. It was a 60-degree V6 and weighed around 342 lb (155 kg). Output for the SOHC version is 163 hp @ 5500 RPM's & 170 lb·ft (230 N·m) of torque @ 4350 RPM's. The engine had low-profile cast aluminum heads which helped it to fit into small engine bays, while pent-roof combustion chambers increased efficiency and made room for four valves per cylinder, arranged in a cross-flow pattern with a "tumble" intake port for both strong breathing and low emissions. Spark plugs were centered in the combustion chambers. The intake valves were 1.30 inches (33 mm) in diameter while exhaust valves were 1.14 inches (29 mm). A toothed timing belt was used. [1]



The 3.5 L (3497 cc) 6G74 is a 24-valve unit available with either SOHC, DOHC, or MIVEC DOHC. Bore is 93 mm and stroke is 85.8 mm. Output is 205 hp (153 kW) at 5000 rpm with 231 ft·lbf (313 N·m) of torque at 4000 rpm for the SOHC, 194 kW (260 hp) at 6000 and 324Nm (240 ft·lb) at 4500 rpm for the MIVEC. The most common 6G74 has a cast iron engine block and an aluminum cylinder head. It uses MFI fuel injection and uses forged steel connecting rods.


6G74 GDI[]

The gasoline direct injection version of the 6G74 was launched in April 1997 as the first GDI V6 engine ever produced. It differed from the basic 6G74 in many ways apart from its unique fuel injection system — it had a crown-curved rather than flat combustion chamber, upright intake ports rather than angled, and a 10.4:1 rather than 10.0:1 compression ratio. Mitsubishi claimed 30 percent better fuel economy, a 30 percent reduction in emissions, and higher power outputs than diesels.[2]


The 6G75 is a 3.8 L (3828 cc) version with 95 mm bore and 90 mm stroke. Output varies from 230 hp (172 kW) and 250 ft·lbf (339 N·m) to 263 hp (197 kW) and 260 ft·lbf (353 N·m) depending on application. It has forged steel connecting rods.


See also[]

  • List of Mitsubishi engines
Engines, platforms & technologies:
2G | 3B | 3G | 3A9x | 4A3x | 4A9x | 4B | 4D5x | 4G1x | 4G3x | 4G4x | 4G5x | 4G6x | 4G9x | 4M | 6A | 6B | 6G | 8A | KE
Astron | Cyclone V6 | GEMA | Neptune | Orion | Saturn | Sirius | Vulcan
GS platform | PS platform | Z platform
ACD | Active-Trac | AWC | AYC | GDI | INVECS | MATT | MIEV | MIVEC | MultiMode ABS | Modulated Displacement | RISE | Silent Shaft | Sport ABS | Super Select | Vertical Vortex


1. ^ The Mitsubishi 2.5 Liter V6 Engine. Allpar, LLC (1995). 2. ^ Press release: Mitsubishi Motors Adds World First V6 3.5-liter GDI Engine to Ultra-efficiency GDI Series. Retrieved on 2006-03-16.