Nissan VG engine


The VG engine is a family of V6 engines designed and produced by Nissan between 1983 and 2004. It was added to a new engine family name PLASMA.
Produced as Japan's first mass-produced V6 engines, the iron block/aluminum head 60° VG engine was produced in displacements between 2.0 and 3.3 liters. Early versions used SOHC cylinder heads with two valves per cylinder; later models featured DOHC cylinder heads, four valves per cylinder, a slightly different engine block and N-VCT, Nissan's own version of variable valve timing, delivering a smoother idle and more torque at low to medium engine speeds.
Both production blocks and head castings were used successfully in the Nissan GTP ZX-Turbo and NPT-90 race cars which won the IMSA GT Championship three years in a row.

Origins

Development of the VG series began in 1979 by Nissan Machinery, a former member of the Nissan Group keiretsu. The objective was to replace the inline 6 L engine, which traces its roots back to the Mercedes-Benz M180 engine introduced in 1951, with an all-new V6 engine.
Nissan engineers wanted the VG to have improved performance, fuel economy, reliability, and refinement, while being both lighter and more compact than its predecessor. The resulting engine was designed from scratch, sharing little to no mechanical components with its predecessor or any other automaker. Extensive computer design techniques were used during development, which made the VG series one of the most advanced and high-tech engines of its day.
The VG engine series featured a sequential multi-port fuel injection system, and Nissan's Electronic Concentrated Control System. ECCS used a microprocessor and an oxygen sensor to control fuel delivery, spark timing, exhaust gas recirculation rate, and engine idle speed, depending on the current operating conditions of the engine. This system reduced carbon emissions, improved fuel economy, and improved engine performance during cold-start and warm-up conditions.
The advantages of the VG engine over its inline 6 predecessor was that its V6 configuration would have greater torsional rigidity for higher performance potential, and its shorter length would give Nissan designers and engineers more freedom for vehicle design, allowing for both more frontal crush zone space and transverse mounting for front-wheel-drive vehicles.
All VG engines use a timing belt to synchronize the camshafts with the crankshaft rather than a timing chain. The VG series engine was put into thousands of Nissan vehicles, debuting in Japan in the 1983 Nissan Gloria/Nissan Cedric and in the US and other markets in the 1984 Nissan 300ZX, making it the first V6 engines made by a Japanese manufacturer to be produced in mass-production.
After the introduction of the VQ engine in 1994, the VG engine was slowly phased out in Nissan cars, and after 2002 it was only available in the Nissan Frontier and Nissan Xterra. The VG engine was retired in 2004, by which time all V6-powered Nissans had switched to the VQ. The last vehicle powered by a VG series engine was the Y31 Nissan Cedric for fleet use, which kept use of the VG20P engine for more than 20 years until it was retired in 2007.

VG20E

The VG20E is a SOHC engine produced from 1983 on. It produces between and net. In the earlier gross rating system, early eighties' models claim.
Applications:
  • 1983–1987 Nissan Gloria/Nissan Cedric Y30
  • 1987–1999 Nissan Gloria/Nissan Cedric Wagon/Van Y30
  • 1986-1988 Nissan Bluebird Maxima U11
  • 1986-1992 Nissan Leopard F31
  • 1987–2002 Nissan Gloria/Nissan Cedric Y31
  • 1991–1995 Nissan Gloria/Nissan Cedric Y32
  • 1996–2002 Nissan Gloria/Nissan Cedric Y33
  • 1997-1999 Nissan Leopard JY33
  • 2000–2005 Hongqi Century Star - based on Hongqi CA7180 and 7202 Audi 100 based

    VG20ET

The VG20ET was based on the VG20E, but with an added variable-geometry turbocharger. The VG20ET produces. This SOHC motor debuted after the VG20E in 1984. Also coming with the Y30, this motor was known as the "Jet Turbo", and came with the Nissan Leopard models XS, and XS-II Grand Selection. Contrary to the VG30ET that came out in the US, the VG20ET came with an intercooler in certain models to push the horsepower output to, a great jump from the normally aspirated VG20E. The turbo included with the VG20ET had two different settings. At low speeds, the turbo's wastegate would stay closed improving the response at low rpm. At high speeds, the flap would stay open, decreasing resistance and increasing exhaust flow. At its maximum flow, the flap would open at an angle of 27 degrees, while the A/R ranged from 0.21-0.77. Being that the VG20ET had a short stroke, it was thought to have insufficient low end torque. Nevertheless, the VG20ET was a great improvement over the VG20E.
Applications:
The VG20DET is an DOHC engine with a ceramic turbocharger and intercooler. It has a bore and a stroke of and produces. This engine features NVTCS.
Applications:
  • 1987—1999 Nissan Gloria/Nissan Cedric
  • 1988.08—1992.06 Nissan Leopard

    VG20P

The VG20P is the Autogas version of the VG20. It produces at 5,600 rpm and at 2,400 rpm. Later versions produce at 6,000 rpm and at 2,400 rpm. It is an overhead cam, twelve-valve engine.
Applications:
The VG30S is a SOHC twelve-valve engine with an electronic carburettor which produces at 4,800 rpm and at 3,600 rpm. This engine was mainly offered in export markets with more lenient environmental regulations, such as the Middle East and Africa.
Applications:
The VG30i is a engine produced from 1986 through 1989. It features a throttle body fuel injection system. It has a long crank snout, a cylinder head temperature sensor positioned behind the timing belt cover, and a knock sensor in the cylinder valley. It produces at 4,800 rpm and at 2,800 rpm.
Applications:
The VG30E produced and. Bore and stroke is. In the 300ZX, it produced and of torque. In April 1987 the "W" series VG30 was released, adding 5 horsepower but leaving torque unchanged. In 1989, the Maxima received the rating, but also used a variable intake plenum improving torque to at 3200 rpm.
Applications:
  • 1984-1989 Nissan 300ZX 9.0:1 compression ratio for NA
  • 1984-1989 Nissan Laurel
  • 1985-1994 Nissan Maxima
  • 1987-1988 Nissan 200SX SE
  • 1988-1996 Nissan Homy & Caravan series E24
  • 1990-1992 Infiniti M30/Nissan Leopard
  • 1990-1995 D21 Hardbody Truck
  • 1990-1996 Nissan Pathfinder/Nissan Terrano
  • 1992-1999 Nissan Gloria/Nissan Cedric
  • 1993-1998 Nissan Quest/Mercury Villager
  • 2004-2006 Derways Cowboy
  • Langley Speedway Pro 6

    VG30ET

The VG30ET was available in early production with a single Garrett T3 turbocharger at and a 7.8:1 compression ratio. The USDM and JDM version produced and. European versions produced and. When "W"-Series VG30 was released in April 1987, horsepower was increased to. All 1987 models featured a T3 turbocharger at. In 1988 the compression ratio was changed to 8.3:1 and turbocharged with a single Garrett T25 turbocharger at to reduce turbo lag.
The engine specified as the VG30ET engine in the Nissan GTP ZX-Turbo Racecar, was a heavily modified VG30ET producing over at 8,000 rpm, and over at 5,500 rpm.
Applications:
The first DOHC 24 valve VG30DE engine was developed for the 1985 MID4 concept. The VG30DE produces and. Bore and stroke is. Original Japanese market units claimed. There are two versions of the VG30DE. The first was introduced in 1986 and was never sold in North America or other countries, and was exclusively offered on the Japanese 300ZR and Nissan Leopard F31. The second was introduced in 1989, this time being sold outside of Japan and into North America and other countries in the 300ZX and the Japan-only Cima. The VG30DE has two throttle bodies facing the front of the vehicle or two throttle bodies to the left. It was also installed with N-VCT, an early form of variable valve timing.
Early VG30DEs used large oval intake ports, and round exhaust ports, though the flange was similar to the SOHC VG engine, bolt spacing was slightly different. Late VG30DE's used slightly smaller oval intake ports, and oval exhaust ports. The bolt spacing was shared with the round-port variant from earlier years.
Applications:
YearsModelPower output
1985Nissan MID4Concept
1986-1989Nissan 300ZX Z31
1990-1997Nissan 300ZX Z32
1989-2000Nissan Fairlady Z Z32
1986-1992Nissan Leopard F31
1992-1998Infiniti J30/Nissan Leopard J Ferie
1992-1995Nissan Gloria and Cedric
1989-1991Nissan Cima

VG30DET

The VG30DET is a, 24-valve, DOHC, VTC-equipped engine equipped with a non-intercooled T3 4-bolt Garrett Turbo running between. Generating up to and measuring depending on the production year and application, it is a single-turbo engine that was used from 1987 through 1995 in the Japanese market, and the predecessor to the VG30DETT engine.
While this engine is similar to the VG30DE, it used different heads and inlet manifold. Contrary to popular belief, it was not available in the Nissan 300ZR model - the 300ZR only had an early version of the VG30DE. The engine was available in the Cedric, Gloria, Cima and Leopard chassis.
Applications:
  • Nissan Cedric Y32
  • Nissan Gloria Y32
  • Nissan Cima FY31, FY32
  • Nissan Leopard F31
  • Autech Zagato Stelvio used a modified version with @ 6000 rpm.