VG30E
| Nissan VG engine | |
|---|---|
| Overview | |
| Manufacturer | Nissan (Nissan Machinery) |
| Production | 1983-2004 |
| Combustion chamber | |
| Configuration | 60° V6 |
| Displacement | 2.0L 3.0L 3.3L |
| Cylinder block alloy | Cast iron |
| Cylinder head alloy | Aluminum |
| Valvetrain |
SOHC DOHC |
| Combustion | |
| Supercharger | Single Eaton Roots-type M62 (2001-2004 VG33ER) |
| Turbocharger | Single Garrett T3 (1983–1987 VG30ET; all VG30DET) Single Garrett T25 (1988-1989 VG30ET) Twin Garrett/Mitsubishi T22/TB02 (1989-2000 VG30DETT) |
| Chronology | |
| Predecessor | Nissan L engine (6-cylinder) |
| Successor | Nissan VQ engine |
The VG engine family consists of V6 piston engines designed and produced by Nissan for several vehicles in the Nissan lineup. The VG series started in 1983 becoming Japan's first mass-produced V6 engine. VG engines displace between 2.0 L and 3.3 L and feature an iron block and aluminum heads. The early VG engines featured a SOHC arrangement with 6 valves per head. A later revision featured a slightly different block, and a DOHC arrangement which utilized 12 valves per head and Nissan's own version of variable valve timing for a smoother idle and more torque at low to medium engine speeds. The block features a single piece main bearing cap. The production blocks and production 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.
The VG series engine found its way into thousands of Nissan vehicles, starting in 1984. The VG design was retired in 2004, by which time all V6-powered Nissans had switched to the VQ engine series.
The VG20E is a 2.0 L SOHC (1,998 cc) engine produced from 1984 on. It produces between 115 PS (85 kW) and 125 PS (92 kW) net. In the earlier gross rating system, early eighties' models claim 130 PS (96 kW).
Applications:
The VG20ET was based on the VG20E, but with a turbocharger. The VG20ET produces 170 hp (130 kW). This SOHC motor debuted at the same time as the VG20E. 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 155 hp (116 kW), 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 (78x69.7 mm), it was thought to have insufficient low end torque. Nevertheless, the VG20ET was a great improvement over the VG20E.
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