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Message: <blockquote data-quote="stormlcc" data-source="post: 1628281" data-attributes="member: 6489">Looks like we got it all wrong here, except CMNG (he's the real expert on the RB series)The 2.5L RB25 engine was produced in three forms:<ul> <li data-xf-list-type="ul">RB25DE - twin-cam (190 to 200hp)</li> <li data-xf-list-type="ul">RB25DET - twin-cam turbo (245 to 250hp)</li> <li data-xf-list-type="ul">NEO RB25DET - twin-cam turbo (280hp)</li> </ul>RB25DE and DET engines produced from August 1993 also featured <a href="http://en.wikipedia.org/wiki/Variable_cam_timing" target="_blank">NVCS</a> (Nissan Variable Cam System) for the <a href="http://en.wikipedia.org/wiki/Intake_manifold" target="_blank">intake</a> cam. This gave the new RB25DE more power and torque at lower rpm than the previous model.In May 1998 a NEO head was fitted. This was also a low emission vehicle engine (LEV). The non-VCT and non-turbo was fitted to the R32 Skyline, the VCT turbo and non-turbo was fitted to R33 Skylines and Stageas. R34 Skylines also use these engines, but they are fitted with a NEO head.source:<a href="http://en.wikipedia.org/wiki/Nissan_RB_engine" target="_blank">http://en.wikipedia.org/wiki/Nissan_RB_engine</a>the variable valve timing function is known as NEO VVLVVLFrom Wikipedia, the free encyclopediaJump to: <a href="http://en.wikipedia.org/wiki/VVL#column-one" target="_blank">navigation</a>, <a href="http://en.wikipedia.org/wiki/VVL#searchInput" target="_blank">search</a>Nissan VVL enginesNissan SR20VE enginePower:187hpTorque:145lb/ftProdution:1997-2001Vehicle:Nissan PrimeraNissan BluebirdNissan Wingroad<a href="http://en.wikipedia.org/wiki/Image:20v.jpg" target="_blank">http://en.wikipedia.org/wiki/Image:20v.jpg</a>Nissan SR20VE '20V' enginePower:204hpTorque:152lb/ftProdution:2001-PresentVehicle:Nissan Primera 20V<a href="http://en.wikipedia.org/wiki/Image:16v.jpg" target="_blank">http://en.wikipedia.org/wiki/Image:16v.jpg</a>Nissan SR16VE enginePower:173hpTorque:119lb/ftProdution:1997-2001Vehicle:Nissan Sunny Lucino VZ-RNissan Sunny GTNissan Pulsar VZ-R<a href="http://en.wikipedia.org/wiki/Image:20v.jpg" target="_blank">http://en.wikipedia.org/wiki/Image:20v.jpg</a>Nissan SR20VE '20V' enginePower:204hpTorque:152lb/ftProdution:2001-PresentVehicle:Nissan Primera 20V<a href="http://en.wikipedia.org/wiki/Image:Sr20vet.jpg" target="_blank">http://en.wikipedia.org/wiki/Image:Sr20vet.jpg</a>Nissan SR20VET enginePower:276hp (280ps)Torque:228lb/ftProdution:2001-presentVehicle:Nissan X-Trail GTNissan Ecology Oriented Variable Valve Lift and Timing (commonly known as VVL) is an <a href="http://en.wikipedia.org/wiki/Automobile" target="_blank">automobile</a> <a href="http://en.wikipedia.org/wiki/Variable_valve_timing" target="_blank">variable valve timing</a> technology developed by <a href="http://en.wikipedia.org/wiki/Nissan" target="_blank">Nissan</a>. VVL varies the timing, duration, and lift of <a href="http://en.wikipedia.org/wiki/Poppet_valve" target="_blank">valves</a> by using <a href="http://en.wikipedia.org/wiki/Hydraulic" target="_blank">hydraulic</a> pressure switch between two different sets of <a href="http://en.wikipedia.org/wiki/Camshaft" target="_blank">camshaft</a> <a href="http://en.wikipedia.org/wiki/Lobe" target="_blank">lobes</a>. It functions similarly to <a href="http://en.wikipedia.org/wiki/Honda" target="_blank">Honda</a>'s <a href="http://en.wikipedia.org/wiki/VTEC" target="_blank">VTEC</a> system.The SR20VE is the most common engine with NEO VVL. There have been two main versions of this engine. The first version made 187hp and 145lb/ft torque. This engine was used by Nissan from 1997 to 2001. It is found in the <a href="http://en.wikipedia.org/wiki/Nissan_Primera" target="_blank">Nissan Primera</a>, <a href="http://en.wikipedia.org/wiki/Nissan_Bluebird" target="_blank">Nissan Bluebird</a>, and the <a href="http://en.wikipedia.org/wiki/Nissan_Wingroad" target="_blank">Nissan Wingroad</a>.The second variant of the SR20VE is found only in the 2001 and up, P12 <a href="http://en.wikipedia.org/wiki/Nissan_Primera" target="_blank">Nissan Primera</a>. This verion of the SR20VE makes 204hp, and 152lb/ft torque. This engine is commonly known as the SR20VE '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 the Nissan Primera that it is found in. It is also a shortened version of the name <a href="http://en.wikipedia.org/w/index.php?title=SR20VE&action=edit" target="_blank">SR20VE</a>. This engine has 16 valves like the rest of the SR20 engines. This newer '20V' engine, is the only <a href="http://en.wikipedia.org/w/index.php?title=SR20&action=edit" target="_blank">SR20</a> engine to get a restyled <a href="http://en.wikipedia.org/w/index.php?title=Valve_cover&action=edit" target="_blank">valve cover</a>. It also has an upgraded <a href="http://en.wikipedia.org/wiki/Intake_manifold" target="_blank">intake manifold</a>, which has longer runners and a larger 70mm throttle body (earlier SR20VE has 60mm).Another version of the VVL SR engines, is the SR16VE. Although this engine has 1.6L of displacement, it has more aggressive camshaft specifications. It manages to make 173hp. The camshafts from this engine are considered to be an upgrade for SR20VE owners.From 1997 to 1998, Nissan produced 500 limited edition SR16VE N1 engines. These engines made 197hp. They had further upgraded camshafts, and an upgraded intake manifold, and larger 70mm throttle body. These engines were found in the limited edition Nissan Pulsar VZ-R N1. They sold in Japan, Australia, New Zealand, and the UK.One difference from <a href="http://en.wikipedia.org/wiki/Honda" target="_blank">Honda</a>'s <a href="http://en.wikipedia.org/wiki/VTEC" target="_blank">VTEC</a> system, is that NEO VVL engages the change of intake and exhaust cams independently. On the SR20VE the intake camshaft is switched at 5000rpm, and the exhaust at 6500rpm. However this trait was not included on the newer '20v' version, as both camshafts engage at the same RPM.[<a href="http://en.wikipedia.org/w/index.php?title=VVL&action=edit&section=1" target="_blank">edit</a>]http://www.zerotohundred.com/newforums/Engines That Have Neo VVL<ul> <li data-xf-list-type="ul"><a href="http://en.wikipedia.org/wiki/Nissan_SR_engine" target="_blank">SR16VE</a></li> <li data-xf-list-type="ul"><a href="http://en.wikipedia.org/wiki/Nissan_SR_engine" target="_blank">SR20VE</a></li> <li data-xf-list-type="ul"><a href="http://en.wikipedia.org/wiki/Nissan_SR_engine" target="_blank">SR20VET</a></li> </ul>Currently, this technology is only available in the Japanese Market. However, many Nissan enthusiasts import this engine for swap.[<a href="http://en.wikipedia.org/w/index.php?title=VVL&action=edit&section=2" target="_blank">edit</a>]http://www.zerotohundred.com/newforums/See also<ul> <li data-xf-list-type="ul"><a href="http://en.wikipedia.org/wiki/Variable_Valve_Timing" target="_blank">Variable Valve Timing</a></li> <li data-xf-list-type="ul"><a href="http://en.wikipedia.org/wiki/Valve_lift" target="_blank">Valve lift</a></li> </ul>[<a href="http://en.wikipedia.org/w/index.php?title=VVL&action=edit&section=3" target="_blank">edit</a>]http://www.zerotohundred.com/newforums/Sources<ul> <li data-xf-list-type="ul"><a href="http://www.sr20forum.com/showthread.php?t=18317" target="_blank">SR20forum VVL FAQ</a> FAQ about VVL</li> <li data-xf-list-type="ul"><a href="http://www.nissan.co.jp/" target="_blank">Nissan Japan</a> Official Nissan of Japan site</li> </ul>source:<a href="http://en.wikipedia.org/wiki/VVL" target="_blank">http://en.wikipedia.org/wiki/VVL</a></blockquote>

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