Αρχείο μηνός Μάρτιος 2022

The RB engine is an oversquare 2.0–3.0 L straight-6 four-stroke gasoline engine from Nissan, produced from 1985 to 2004, and will be continuing production in 2019, after a 15 year hiatus.^[3][4][5] The RB followed the 1983 VG-series V6 engines to offer a full, modern range in both straight or V layouts.^[6]

Both SOHC and DOHC versions have an aluminium head. The SOHC versions have 2 valves per cylinder and the DOHC versions have 4 valves per cylinder; each cam lobe moves only one valve. All RB engines have belt driven cams and a cast iron block. Most turbo models have an intercooled turbo (the exceptions being the single cam RB20ET & RB30ET engines), and most have a recirculating factory blow off valve (the exceptions being when fitted to Laurels and Cefiros) to reduce compressor surge when the throttle quickly closes. The Nissan RB Engine is derived from the six cylinder Nissan L20A engine which has the same bore and stroke as the RB20. All RB engines were made in Yokohama, Japan where the new VR38DETT is now made. Some RB engines were rebuilt by Nissan’s NISMO division at the Omori Factory in Tokyo as well. All Z-Tune Skylines were rebuilt at the Omori Factory.

The Nissan S20 engine 2.0 L (1,989 cc)^[a] was a straight-6, DOHC internal combustion engine produced by Nissan from 1969 to 1973, originally designed by engineers of the former Prince. It was essentially a revised production variant of the 1966 Prince GR8 engine from Prince/Nissan’s R380 racecar. It produces 160 hp (119 kW; 162 PS) at 7000 rpm and 177 N⋅m; 130 lbf⋅ft (18 kg⋅m) of torque at 5600 rpm. The S20 weighs 199 kg (439 lb). This engine is not to be confused with the unrelated Nissan SR20, which is a straight 4 cylinder petrol engine used in other Nissan models.

The S20 powered Nissan’s Skyline GT-R (C10 and C110) and Fairlady Z432 models.

The 2JZ-GE is a common version. Output is 215–230 PS (158–169 kW; 212–227 bhp) at 5800 to 6000 rpm and 209–220 lb⋅ft (283–298 N⋅m) of torque at 4800 to 5800 rpm.

It uses Sequential Electronic Fuel Injection, has an aluminum head and 4 valves per cylinder, along with a cast-iron cylinder block, with some versions using VVT-i. The VVT-i version also featured DIS in favor of the traditional distributor set-up previously seen on the 1JZ-GE. Despite the common misconception, it was not a true COP (Coil-On-Plug, also known as Plug-top coil) ignition system instead relying on one coil to fire two cylinders, one of which was by spark plug wire.

The 2,997 cc (3.0 L; 182.9 cu in) 2JZ has been produced since 1991 (first released in the 1991 Toyota Aristo). Cylinder bore and stroke is 86 mm × 86 mm (3.39 in × 3.39 in). VVT-i variable valve timing was added later in 1997 for the 1998 model year. This engine is not merely a stroked version of the 1JZ (although they share a common bore size, bore pitch, and general architecture), but has a taller block deck and longer connecting rods to accommodate the 14.5 mm (0.57 in) stroke increase.

In around 2000, Toyota introduced what are probably the least recognised members of the JZ engine family – the FSE direct injection variants. These FSE 1JZ and 2JZ engines are aimed at achieving minimal emissions and fuel consumption together with no loss of performance.

The 2.5-litre 1JZ-FSE employs the same block as the conventional 1JZ-GE; however, the design of the cylinder head is unique. The ‘D4’ FSE employs a relatively narrow angle cylinder head with swirl control valves that serve to improve combustion efficiency. This is necessary to run at extremely lean air-fuel ratios around 20 to 40:1 at certain engine load and revs. Not surprisingly, fuel consumption is reduced by around 20 percent (when tested in the Japanese 10/15 urban mode).

Normal unleaded fuel is enough to cope with the FSE’s 11:1 compression ratio.

The direct injection version of the 1JZ generates 147 kW (200 PS; 197 hp) and 250 N⋅m (184 lb⋅ft) – virtually the same as the conventional VVT-i 1JZ-GE. The 1JZ-FSE is always used with an automatic transmission.

The first generation 1JZ-GTE employs twin CT12A turbochargers arranged in parallel and blowing through a side-mount or front mount air-to-air intercooler. With an 8.5:1 static compression ratio, the factory quoted power and torque outputs are 280 PS (206 kW; 276 hp) at 6200 rpm and 363 N⋅m (268 lbf⋅ft) at 4800 rpm. The bore and stroke are the same as for the 1JZ-GE: bore × stroke is 86 mm × 71.5 mm (3.39 in × 2.81 in). In 1991, the 1JZ-GTE was slotted into the all-new Soarer GT.

The early generation 1JZ-GTEs combined the inherent smoothness of an inline 6-cylinder engine with the revving capacity of its short stroke and early power delivery of its small, ceramic wheeled turbochargers. The ceramic turbine wheels are prone to delamination in the setting of high impeller rpm and local temperature conditions, usually a result of higher boost. The first generation 1JZs were even more prone to turbo failure due to there being a faulty one-way valve on the head, specifically on the intake cam cover causing blow-by gases to go into the intake manifold. On the exhaust side, a decent amount of oil vapor flows into the turbos causing premature wear on the seals. The later second generation engines had this problem fixed and in Japan there was actually a recall in order to repair the first generation engines, though that does not apply to 1JZs imported to other countries. The fix is simple, and involves replacement of the PCV valve (2JZ); all parts are available through Toyota.

The third generation of the 1JZ-GTE was introduced around 1996, still as a 2.5-litre turbo, but with Toyota’s BEAMS architecture.^[2] This included a reworked head, newly developed continuously variable valve timing mechanism (VVT-i), modified water jackets for improved cylinder cooling and newly developed shims with a titanium nitride coating for reduced cam friction.^[3] The turbo setup changed from parallel twin turbo (CT12A x2) to a single turbo (CT15B). The single turbo is in part made more efficient by the use of smaller exhaust ports in the head, this allows the escaping exhaust gasses to have more velocity as they exit the head, which in turn, spools the turbo faster and at lower RPM.The adoption of VVT-i and the improved cylinder cooling allowed the compression ratio to be increased from 8.5:1 to 9.0:1. Even though the official power figures remained at 280 PS (206 kW; 276 hp) at 6200 rpm, torque was increased by 20 N⋅m (15 lbf⋅ft) to 379 N⋅m (280 lbf⋅ft) at 2400 rpm. These improvements resulted in increased engine efficiency that reduced fuel consumption by 10%. The adoption of VVTi, a much higher efficiency single turbocharger than the twins as well as different manifold and exhaust ports were responsible for most of the 50% torque increase at low engine speeds. This engine was used primarily in Toyota’s X chassis cars (Chaser, Mark II, Cresta, Verossa, Blit), the Crown Athlete V (JZS171) and in the later JZZ30 Soarer, as the JZA70 Supra was long discontinued by this time.

The 2.5-litre 1JZ uses over square bore dimensions 86 mm × 71.5 mm (3.39 in × 2.81 in) and, in naturally aspirated guise, a 10:1 compression ratio. With the aid of a DOHC, 24-valve head and a dual-stage intake manifold. Like all JZ-series engines, the early 1JZ-GE is designed for longitudinal mounting and rear-wheel-drive. All of these models also came with a 4-speed automatic transmission as standard; no manual gearbox option was offered.^[1] Output for the early non-turbo, non VVTI (1990–1995) 1JZ-GE was 125 kW (168 bhp; 170 PS) at 6000 rpm and 235 N⋅m (173 lb⋅ft) at 4800 rpm.

In 1995, VVTI was added for an output of 147 kW (197 bhp; 200 PS) at 6000 rpm and 251 N⋅m (185 lb⋅ft) at 4000 rpm.

The 2,492 cc (2.5 L; 152.1 cu in) 1JZ version was produced from 1990 to 2007 (last sold in the Mark II BLIT Wagon and Crown Athlete). Cylinder bore and stroke is 86 mm × 71.5 mm (3.39 in × 2.81 in).^[1]
It is a 24-valve DOHC engine with two belt-driven camshafts.