| Nissan SR16VE | |
|---|---|
 | |
| Overview | |
| Production | 1997–2001 |
| Layout | |
| Displacement | 1.6L |
| Output | |
| Power output | 175 hp (130 kW) |
| Torque output | 119 lb⋅ft (161 N⋅m) |
| Nissan SR20VE | |
|---|---|
 | |
| Overview | |
| Production | 2001–2003 |
| Layout | |
| Displacement | 2.0L |
| Output | |
| Power output | 204 hp (152 kW) |
| Torque output | 152 lb⋅ft (206 N⋅m) |
| Nissan SR20VET | |
|---|---|
 | |
| Overview | |
| Production | 2001–2007 |
| Layout | |
| Displacement | 2.0L |
| Output | |
| Power output | 276 hp (206 kW) |
| Torque output | 228 lb⋅ft (309 N⋅m) |
Nissan Ecology Oriented Variable Valve Lift and Timing (commonly known as VVL & VVT) is anautomobilevariable valve timing technology developed byNissan. VVL varies the duration, and lift ofvalves by usinghydraulic pressure switch between two different sets ofcamshaft lobes. VVT varies the valve timing throughout the RPM range. Together they function similarly toHonda'sVTEC system.
TheSR20VE is the most common engine with NEO VVL. There have been two main versions of this engine. The first version made 187 hp (139 kW) and 145 lb⋅ft (197 N⋅m) torque. This engine was used by Nissan from 1997 to 2001. It is found in theNissan Primera,Nissan Bluebird, and theNissan Wingroad.
The second variant of theSR20VE is found only in the 2001 and later P12Nissan Primera. This version of theSR20VE makes 204 hp (152 kW), and 152 lb⋅ft (206 N⋅m) torque. This engine is commonly known as theSR20VE '20V'. Although, in automotive terms, '20V' would normally be interpreted as having twenty valves, this is incorrect. The name '20V' is the name of the trim level of theNissan Primera that it is found in. It is also a shortened version of the nameSR20VE. This engine has 16 valves like the rest of theSR20 engines. This newer '20V' engine, along with theSR20VET, were the onlySR20 engines to get restyled valve covers. It also came with an upgradedintake manifold, which has longer runners and a larger 70 mm (2.8 in) throttle body (earlierSR20VE has 60 mm).
Another version of the VVLSR engines, is the 1.6 LSR16VE. The engine block for theSR16VE is the same as theSR20VE; it also has the same cylinder bore. The crankshaft has a shorter stroke, which lowers the displacement, but allows the engine to safely rev to higher RPM. Although this engine has 1.6 L of displacement, it has more aggressive camshaft specifications. It manages to make 173 hp (129 kW). The camshafts from this engine are considered to be an upgrade forSR20VE owners.
From 1997 to 1998,Nissan produced 500 limited-editionSR16VE N1 engines. These engines made 197 hp (147 kW). They had further upgraded camshafts, upgraded intake manifold using eight injectors and a larger 70 mm (2.8 in) throttle body. These engines were found in the limited-editionNissan Pulsar VZ-R N1. They were only sold in Japan.
The most powerful VVL engine so far is theSR20VET. TheSR20VET is a turbocharged '20V'SR20VE. It uses aGarrett GT2560LS, and makes 280 PS (206 kW; 276 hp).Nissan's technical information about this engine states that it is 9:1compression ratio, but it really adds up to 8.8:1.[citation needed] Compared to theSR20DET (used in theNissan Silvia, and Bluebird), theSR20VET (aside from having VVL technology) has improved airflow in thecylinder head, higher compression, and also improved coolant passages.
In 1998Nissan'sRB engine was also improved using the NEO Head Technology (but no VVL), which provided the motor better fuel economy and lower exhaust emissions to keep up with emission standards.
One difference fromHonda'sVTEC system is that NEO VVL engages the change of intake and exhaust cams independently for a flatter, more consistent power band. On theSR20VE, the intake camshaft is switched at 5000 rpm, and the exhaust at 6500 rpm. However this trait was not included on the newer '20V' version, as both camshafts engage at the same RPM.
