At high speeds, the flap would stay open, decreasing resistance and increasing exhaust flow. At low speeds, the turbo's wastegate would stay closed improving the response at low rpm. The turbo included with the VG20ET had two different settings. 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 PS (114 kW 153 hp), a great jump from the normally aspirated 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. ![]() ![]() This SOHC motor debuted at the same time as the VG20E. The VG20ET was based on the VG20E, but with an added turbocharger. ( November 2018) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this section by adding citations to reliable sources. The VG engine was retired in 2004, by which time all V6-powered Nissans had switched to the VQ engine. When the Nissan VQ engine was introduced in 1994, the VG engine was slowly phased out in Nissan cars, and after 2000 it was only available in the Nissan Frontier and Nissan Xterra. 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. Most VG engines use an interference design in the event of a timing belt failure, The pistons will likely bend the valves, and can cause major engine damage. The advantages of the VG engine over its 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 them to design vehicles that had more frontal crush zone space, and would allow transverse mounting for front-wheel-drive vehicles.Īll VG engines use a timing belt to synchronize the camshafts with the crankshaft, in comparison to the L engine, which uses a timing chain. This system reduced carbon emissions, improved fuel economy, and improved engine performance during cold-start and warm-up conditions. It featured a sequential multi-port fuel injection system, and Nissan's Electronic Concentrated Control System (ECCS).ĮCCS 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. 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. Nissan engineers wanted the VG engine to have improved performance, fuel economy, reliability, and refinement, as well as having reduced weight and a more compact design than its predecessor. The VG engine was fully designed by Nissan from scratch, and shared little mechanical components with its predecessor, or with another automaker's engine. The objective during development was to replace the Nissan L engine, an engine that can trace its roots back to the Mercedes-Benz M180 engine introduced in 1951, with an all-new V6 engine. ![]() ![]() 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.ĭevelopment of the VG series began in 1979 by Nissan Machinery, a former member of the Nissan Group keiretsu. Later versions featured a slightly different block, a DOHC arrangement with four valves per cylinder, and N-VCT, Nissan's own version of variable valve timing, for a smoother idle and more torque at low to medium engine speeds. The early VG engines featured a SOHC arrangement with two valves per cylinder. VG engines displace between 2.0 and 3.3 liters and feature an iron block and aluminum heads at a 60° vee-angle. The VG series was introduced in 1983, becoming Nissan's and Japan's first mass-produced V6 engine. The VG engine family consists of V6 engines designed and produced by Nissan for several vehicles in the Nissan lineup.
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