Difference between revisions of "20NE"

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{{Infobox Automobile engine
The '''20NE''' is a [[Fuel injection|fuel-injected]], four cylinder engine developed by [[General Motors]].
|name=GM LS engine
|aka=[[GM Vortec engine]]
|image=
|manufacturer=[[General Motors]]
|production=1997–present
|class=[[OHV]] [[V8 engine|V8]]
|predecessor=[[GM LT engine]], [[Chevrolet Small-Block engine]], [[Chevrolet Big-Block engine]]
|successor=
|similar=[[Ford Modular engine]]<br>[[Chrysler Hemi engine]]<br>[[Chrysler PowerTech engine|Chrysler PowerTech V8]]<br>[[Nissan VH engine|Nissan VH]]<br>[[Nissan VK engine|Nissan VK]]<br>[[Toyota UZ engine|Toyota UZ]]
}}


The '''LS''' series  is a new design intended as the only V-8 engine utilized in [[General Motors Corporation|General Motors]]' line of RWD cars and trucks.  The LS series was a clean sheet design with little in common with the classic [[Chevrolet Small-Block engine|Chevrolet small block V8]]. The LS is all-[[aluminum]] and has 6-bolt main [[bearing]] caps.  
This was the first [[Overhead camshaft|overhead cam]] (OHC) engine from [[Opel]], featuring milestone technologies like:
*Aluminum head.
*Cross flow design
*Multi point fuel injection
*Electronic ignition/fuel injection.
*Over Head Cam


The LS engine has been the sole powerplant of the [[Chevrolet Corvette]] since 1997 and has seen use in a wide variety of other General Motors vehicles, ranging from [[Pontiac Firebird|sport coupes]] to [[Chevrolet Silverado|full size trucks]]. Due to the engine's relatively compact external dimensions compared to its displacement and power output, the engine family is also a popular choice for [[kit car]]s, [[hot rod]]s and even [[light aircraft]].
This was "the" beginning of all the later Opel petrol engines.  
This was the first time the cast iron block found in most newer 2 liter Opel engines was featured.


==Generation III==
{| class="wikitable"
The '''Generation III''' V-8 engines replaced the [[GM LT engine|LT family]] in 1997. These shared the same [[bore]] spacing (4.4") as their [[cast iron]] predecessors but almost everything else was changed. The bore was reduced to 3.9&nbsp;in and the [[stroke]] longer at 3.62&nbsp;in. The engine blocks were cast in aluminum for car applications, and iron for most truck applications (notable exceptions include the [[Chevrolet TrailBlazer]]). The engine also introduced [[Distributor#Direct ignition|coil-on-plug]] ignition. The traditional five-bolt pentagonal cylinder head pattern was replaced with a square four-bolt design, and the pistons are of the flat-topped variety. The cylinder [[firing order]] was changed to 1-8-7-2-6-5-4-3, so that the LS series now corresponds to the firing pattern of other modern V8 engines (for example the [[Ford Modular engine|Ford Modular V8]]).
! '''Engine'''
| '''20SEH'''
|-
!Configuration
|Inline, SOHC, Transverse 4 Cylender
|-
!Displacement
|1998cc (121.88 cu in)
|-
!Bore 
|86.0mm (3.4in)
|-
!Stroke 
|86.0mm (3.4in)
|-
!Power  
|116 BHP
|-
!Compression ratio
|9.5:1
|-
!Valve-Train
|Belt Driven, 2 Valves per Cylender
|-
!Engine Management
|Bosch, Motronic ML 4.1 
|-
!Firing order  
|1-3-4-2


===LS1===<!-- This section is linked from [[Chevrolet Camaro]] -->
[[Category:GM engines|2.0L]]
[[Image:1998ChevroletCamaroZ28-engine.jpg|right|thumb|250px|GM LS1 engine from the [[Chevrolet Camaro]]]]
 
The '''LS1''' shares little other than similar displacement, external dimensions, and rod bearings, with its [[Chevrolet Small-Block engine| predecessor]]. It is an all-aluminum 5.7&nbsp;L ({{convert|5665|cc|CID|disp=s|abbr=on}}) [[pushrod]] engine and was rated between 305 - 350&nbsp;hp (227 to 261&nbsp;kW) and 335-375&nbsp;ft·lbf (454-508&nbsp;N·m) of [[torque]] in North America, depending on the application.  In Australia, continuous modifications were made to the LS1 engine throughout its lifetime, reaching 382&nbsp;hp (285&nbsp;kW) in the [[Holden Special Vehicles|HSV's]] YII series and a [[Callaway Cars Incorporated|Callaway]] modified version, named C4B, was fitted to HSV GTS models producing 402&nbsp;hp (300&nbsp;kW).
 
The version fitted to the 2004 Pontiac GTO was rated at 350&nbsp;hp (261&nbsp;kW) and 365&nbsp;ft·lbf (494&nbsp;Nm) of torque. Beginning in 2001, the LS1 in the Corvette received the higher-flowing intake from the LS6 and a milder [[camshaft]] to keep power at the same level; this also allowed GM to remove the [[exhaust gas recirculation]] (EGR) system (Camaro/Firebird only; 97-00 Corvette LS1 never used an EGR system). The block is very similar to that of the higher-output LS6; beginning in 2002, some LS1 engines were actually built using the LS6 block instead. {{Fact|date=August 2008}} The LS1 was on the [[Ward's 10 Best Engines]] list for 1998. 
* 1997-2004 [[Chevrolet Corvette C5]], excluding Z06
* 1998-2002 [[Chevrolet Camaro]] Z28, SS
* 1998-2002 [[Pontiac Firebird]] Formula, Trans Am, Trans Am WS6
* 2004 [[Pontiac GTO]]
* 1999-2005 [[Holden Commodore Ute]]
* 1999-2005 [[Holden Commodore]] ([[Holden VT Commodore|VT]], [[Holden VX Commodore|VX]], [[Holden VY Commodore|VY]], [[Holden VZ Commodore|VZ]])
* 1999-2005 [[Holden Statesman]] ([[Holden WH Statesman|WH]], [[Holden WK Statesman|WK]], [[Holden WL Statesman|WL]])
* 1999-2005 [[Holden Caprice]] ([[Holden WH Caprice|WH]], [[Holden WK Caprice|WK]], [[Holden WL Caprice|WL]])
* 1999-2004 [[Holden Special Vehicles]] (all V8 models)
* 2001-2005 [[Holden Monaro]] ''CV8''
* 2006-2007 [[Elfin MS8 Streamliner]]
 
===LS6===
[[Image:Chevrolet Corvette C5 Z06 LS6 engine.jpg|right|thumb|250px|GM LS6 engine in a [[Chevrolet Corvette]] Z06]]
 
:''LS6 can also refer to a 454&nbsp;CID [[Chevrolet Big-Block engine]] of the 1970s''
 
The '''LS6''' is a higher-output version of GM's LS1 engine and retains the same capacity. The initial 2001 LS6 produced 385&nbsp;hp (287&nbsp;kW) and 385&nbsp;ft·lbf (522&nbsp;N·m), but the engine was modified for 2002 through 2004 to produce 405&nbsp;hp (302&nbsp;kW) and 400&nbsp;ft·lbf (542&nbsp;N·m) of torque. The LS6 was originally only used in the high-performance C5 [[Chevrolet Corvette|Corvette]] Z06 model, with the [[Cadillac CTS V-Series]] getting the 400&nbsp;hp engine later. The V-Series used the LS6 for two years before being replaced by the LS2 in 2006. For 2006, the Z06 replaced the LS6 with the new 7.0L [[GM LS engine#LS7|LS7]].
 
The LS6 shares its basic block architecture with the [[GM LS1 engine]], but other changes were made to the design such as windows cast into the block between cylinders, improved main web strength and bay to bay breathing, an intake manifold and MAF-sensor with higher flow, a camshaft with higher lift and more duration, a higher compression ratio and a revised oiling system better suited to high lateral acceleration. <ref>[http://www.idavette.net/hib/ls6/page3.htm Corvette LS6 - Ruthless Pursuit of Power<!-- Bot generated title -->]</ref>
 
The casting number, located on the top rear edge of the block, is 12561168.
 
Applications:
* 2001-2004 [[Chevrolet Corvette C5 Z06]]
* 2004-2005 [[Cadillac CTS V-Series]]
 
==Generation IV==
In 2004, the Generation III was superseded by the '''Generation IV'''. This category of engines has provisions for high-displacement ranges up to 7.0&nbsp;L and power output to {{Convert|638|hp|kW|0|abbr=on}}. Building upon the Generation III design, Generation IV was designed with [[displacement on demand]] in mind, a technology that allows 4 cylinders in alternating fashion from side to side and front to back to be deactivated. It can also accommodate [[variable valve timing]].  A 3-[[poppet valve|valve]] per cylinder design was originally slated for the LS7, which would have been a first for a GM [[pushrod]] engine; but the idea was shelved owing to design complexities and when the same two-valve configuration as the other Generation III and IV engines proved to be sufficient to meet the goals for the LS7.  It has been reported that the LS3 and an upcoming 6.0&nbsp;L Vortec engine represent the final two designs to be considered in the Generation IV engine family, and that future designs — expected around 2009 — will be part of the Generation V engine family.<ref name='Wards Auto 2007-08-30'>{{cite web | first=Mike | last=Sutton | title=GM Reveals Small-Block V-8 With Direct Injection | date=2007-08-29 | url=http://subscribers.wardsauto.com/ar/gm_reveals_v-8/wall.html?return=http://subscribers.wardsauto.com/ar/gm_reveals_v-8/index.html | work =WardsAuto.com | accessdate = 2007-08-30}}</ref>
 
===LS2===<!-- This section is linked from [[Chevrolet Camaro]] -->
[[Image:GM LS2 engine.jpg|right|thumb|250px|GM LS2 engine in a 2005 [[Chevrolet Corvette C6|Chevrolet Corvette]]]]
 
The '''LS2''' was introduced as the Corvette's new base engine for the 2005 model year. It produces {{Convert|400|hp|0|abbr=on}} at 6000&nbsp;rpm and {{Convert|400|ft.lbf|0|abbr=on}} at 4400&nbsp;rpm from a slightly larger displacement of 6.0&nbsp;L ({{convert|5967|cc|CID|disp=s|abbr=on}}). It is similar to the high-performance LS6, but with an improved power peak and more torque throughout the rpm range. The LS2s in the E-series HSVs are modified in Australia to produce {{Convert|412|hp|0|abbr=on}} and {{Convert|412|ft·lbf|0|abbr=on}}. The LS2s in the Buick Rainier, Chevrolet Trailblazer SS, and the Saab 9-7X Aero are rated at 395 hp (295 kW) and 400 lb·ft (540 N·m) of torque.
 
 
 
Applications:
* 2005-2007 [[Buick Rainier]]
 
* 2006-2007 [[Cadillac CTS-V]]
* 2005-2007 [[Chevrolet Corvette C6|Chevrolet Corvette]]
* 2005-2006 [[Chevrolet SSR]]
* 2006-2009 [[Chevrolet TrailBlazer]] ''SS''
* 2004-2007 [[Holden Special Vehicles]] (all V8 models)
* 2005-2006 [[Pontiac GTO]]
* 2008-2009 [[Saab 9-7X]] Aero
* 2005-2006 [[Vauxhall Monaro VXR]]
 
===L76===
:''See also the [[GM Vortec engine#L76|Vortec 6000 L76]]''
'''L76''' was originally [[Holden]]'s version of the 6.0&nbsp;L ({{convert|5967|cc|CID|disp=s|abbr=on}}) Generation IV engine. While displacement on demand technology was disabled on Holdens, this feature is enabled on the 2008 [[Pontiac G8]] and subsequently re fitted in the 2009 model Holdens with AFM enabled, but only on models fitted with the 6L80 Automatic Transmission.  The engine also meets [[Euro III]] emissions requirements. Output is 348&nbsp;hp (260&nbsp;kW) at 5600&nbsp;rpm and 376&nbsp;ft·lbf (510&nbsp;N·m) at 4400&nbsp;rpm for the Holden variant, and 361&nbsp;hp (269.8&nbsp;kW) and 385&nbsp;ft·lbf of torque (526.5&nbsp;N·m) for the G8 GT.<ref name='Global Auto Index G8 Article'>{{cite web | title= All-new G8 accelerates new era of rear-wheel-drive performance at Pontiac| date= 2007-02-07| url= http://www.globalautoindex.com/news.plt?no=1735| work = Global Auto Index| accessdate = 2007-08-30}}</ref>
 
Applications:
* 2006 [[Holden VZ Commodore]]
* 2008 [[Pontiac G8]]
* 2009 [[Holden VE Commodore]]
* 2009 [[Holden WM Statesman]] / [[Holden WM Caprice]]
* 2009 Holden VE UTE
 
===L98===
:''For the tuned-port Generation I engine of the same RPO, see [[Chevrolet Small-Block engine#L98|Chevrolet L98]]''
The '''L98''' is a slightly modified version of the L76. Since Holden does not use displacement on demand, some redundant hardware was removed from the L76. Power increased to 362&nbsp;hp (270&nbsp;kW) at 5700&nbsp;rpm and 391&nbsp;ft·lbf (530&nbsp;Nm) at 4400&nbsp;rpm.
 
Applications:
* 2006 (MY06) Holden VZ SS Thunder Ute
* 2006-2007 [[Holden VE Commodore]]
* 2006-2007 [[Holden WM Statesman]] / [[Holden WM Caprice]]
* 2007-2008 [[Chevrolet Lumina]] SS
* 2007-2008 [[Chevrolet Caprice]] SS
 
===LS3===
[[Image:GM LS3 Engine.jpg|250px|thumb|right|GM LS3 Engine in a 2008 [[Chevrolet Corvette]]]]
 
:''LS3 can also refer to a 402&nbsp;CID [[Chevrolet Big-Block engine]] of the 1970s''
 
The '''LS3''' was introduced as the Corvette's new base engine for the 2008 model year. It produces {{convert|430|hp|kW|abbr=on}} at 5900&nbsp;rpm and {{convert|424|lbf.ft|N.m|abbr=on}} at 4600&nbsp;rpm without the optional Corvette exhaust and is SAE certified. The block is an updated version of the LS2 casting featuring a larger bore of {{convert|4.06|in|mm|abbr=on}} creating a displacement of 6.2&nbsp;L ({{convert|6162|cc|CID|disp=s|abbr=on}}). It also features higher flowing cylinder heads sourced from the [[GM Vortec engine#6200|L92]], a more aggressive camshaft with 0.551" lift, a revised valvetrain with {{convert|6|mm|in|abbr=on}} offset intake rocker arms, a high-flow intake manifold and 47&nbsp;lb/hr fuel injectors from the LS7 engine.
 
The L76/L92/LS3 cylinder heads use {{convert|2.165|in|mm|abbr=on}} intake valves, and {{convert|1.59|in|mm|abbr=on}} exhaust valves. Improved manufacturing efficiency makes these heads cheaper than the outgoing LS6 heads, and severely undercuts aftermarket heads. The large valves, however, limit maximum rpm - 6000 in the L76 (with AFM), and 6600 in the LS3 (with hollow stem valves).
 
In addition to the above, a dual mode exhaust package with a bypass on acceleration is available. The dual-mode exhaust uses vacuum-actuated outlet valves, which control engine noise during low-load operation, but open for maximum performance during high-load operation. The system is similar to the C6 Z06, but uses a {{convert|2.5|in|mm|abbr=on}} diameter exhaust compared to the Z06's {{convert|3|in|mm|abbr=on}}. Power is boosted to {{convert|436|hp|kW|abbr=on}} and {{convert|428|lbf.ft|N.m|abbr=on}} with this option.
 
From April 2008, Australian performance car manufacturer, HSV, adopted the LS3 as its standard V8 throughout the range, replacing the LS2. The LS3 received modifications for its application to HSV's models, producing {{convert|425|hp|kW|abbr=on}}. Power and torque was restricted to protect the drivetrain currently used in the E-Series sedans.
 
Applications:
* April 2008-present [[Holden Special Vehicles]] (all V8 models)
* 2008-present [[Chevrolet Corvette C6|Chevrolet Corvette]]
* 2009 Pontiac G8 GXP (source: Pontiac web site, "Upcoming Vehicles," 3-16-2008)
* June 2008-present [[Vauxhall VXR8]]
* 2010 [[Fifth-generation Chevrolet Camaro|Chevrolet Camaro]]
* The show [[Top Gear]] used the LS3 to power a blender.<ref name='Top Gear Engine-Powered Blender'>{{cite web | title=Top Gear Builds Corvette Engine-Powered Blender| url=http://jalopnik.com/5090926/top-gear-builds-corvette-engine+powered-blender| accessdate = 2008-11-17}}</ref>
 
===L99===
:''For the {{Convert|4.3|L|CID|abbr=on}} Generation II engine of the same RPO, see [[GM_LT_engine#L99_.284.3L.29|GM LT Engine]]''
 
The '''L99''' is derived from the LS3 with reduced output but adds [[Active Fuel Management]] (displacement on demand), which allows it to run on only four cylinders during light load conditions.<ref>[http://paultan.org/archives/2008/07/23/2010-chevrolet-camaro-details-and-hi-res-photos/ 2010 Chevrolet Camaro Details and Hi-Res Photos]</ref> Power is {{Convert|400|hp|0|abbr=on}} and {{Convert|395|ft.lbf|0|abbr=on}} of torque.<ref>{{cite web | title=2010 Chevrolet Camaro First Look | date = 2008-07-18 | url = http://www.edmunds.com/insideline/do/Features/articleId=129446 | accessdate = 2008-07-21}}</ref><ref>{{cite web | title=2010 Chevy Camaro - Official Details and Images | date = 2008-07-21 | url = http://www.autoblog.com/2008/07/21/2010-chevy-camaro-official-details-and-images/ | accessdate = 2008-07-21}}</ref>
 
Applications:
* 2010 [[Fifth-generation Chevrolet Camaro|Chevrolet-Camaro]]
 
===LS4===
[[Image:2006 Chevrolet Impala SS LS4 engine.jpg|right|thumb|250px|5.3&nbsp;L LS4 V8 in a 2006 [[Chevrolet Impala]] SS]]
 
:''LS4 can also refer to a 454&nbsp;CID [[Chevrolet Big-Block engine]] of the 1970s''
 
The '''LS4''' is a smaller 5.3&nbsp;L ({{convert|5328|cc|CID|disp=s|abbr=on}}) version of the Generation IV block. Though it has the same displacement as the [[GM Vortec engine#5300|Vortec 5300 LH6]], it differs in that it has an aluminum block rather than an iron one and it uses the same cylinder head as the Generation III LS6 engine.
 
This engine is adapted for [[transverse engine|transverse]] [[front-wheel drive]] applications.  According to GM, "The crankshaft is shortened 13 mm – 3 mm at the flywheel end and 10 mm at the accessory drive end – to reduce the length of the engine compared to the 6.0L. All accessories are driven by a single serpentine belt to save space. The water pump is mounted remotely with an elongated pump manifold that connects it to the coolant passages. Revised oil pan baffles, or windage trays, are incorporated into the LS4 to ensure that the oil sump stays loaded during high-g cornering." <ref>{{Citation
| title = LS4 Overview - GM Powertrain
| url = http://media.gm.com/us/powertrain/en/product_services/2008/Whats%20New/Gen%20IV/Gen%20IV%20Car/08_LS4.doc
}}</ref> [[Active Fuel Managemment]] is also used. Output of this version is 303&nbsp;hp (226&nbsp;kW)/300 hp on LaCrosse Super and 323&nbsp;ft·lbf (438&nbsp;N·m). 
 
Applications:
* 2006-2009 [[Chevrolet Impala]] SS
* 2006-2007 [[Chevrolet Monte Carlo]] SS
* 2005-2008 [[Pontiac Grand Prix]] GXP
* 2008 [[Buick LaCrosse]] Super
 
===LS7===
[[Image:2006 Chevrolet Corvette Z06 LS7 engine.jpg|right|thumb|250px|7.0&nbsp;L LS7 engine in a 2006 [[Chevrolet Corvette]] Z06]]
 
:''LS7 can also refer to a 454&nbsp;CID [[Chevrolet Big-Block engine]] of the 1970s''
 
The '''LS7''' is a 7.0&nbsp;L ({{convert|7011|cc|CID|disp=s|abbr=on}}) engine, based on the Gen IV architecture. The block is changed, with sleeved pistons and a larger 4.125&nbsp;in (104.9&nbsp;mm) bore and longer 4.00&nbsp;in (101.6&nbsp;mm) stroke than the LS2. The small-block's 4.4&nbsp;in (111.8&nbsp;mm) bore spacing is retained, requiring pressed-in cylinder liners. The crankshaft and main bearing caps are [[forged]] steel for durability, the connecting rods are forged titanium, and the pistons are [[Hypereutectic piston|hypereutectic]].  The two-valve arrangement is retained, though the titanium intake valves by [[Del West]] have grown to 2.20&nbsp;in (55.9&nbsp;mm) and sodium-filled exhaust valves are up to 1.61&nbsp;in (40.9&nbsp;mm).
 
Peak output is 505&nbsp;hp (377&nbsp;kW) at 6300&nbsp;rpm and 470&nbsp;ft·lbf (637&nbsp;N·m) at 4800&nbsp;rpm with a 7000&nbsp;rpm [[redline]] setting a new record for a production overhead valve pushrod engine.{{Fact|date=December 2007}}  During GM's reliability testing of this engine in its prototype phase, the LS7 was remarked to have been repeatedly tested to be 8000 rpm capable, although power was not made at that rpm level, due to the constraints of the camshaft's profile and the intake manifold ability to flow required air at that engine speed.
 
The LS7 is hand-built by the [[General Motors Performance Build Center]] in [[Wixom, Michigan]]. Most of these engines are installed in the Z06, but some are also sold to individuals by GM as a [[crate engine]].
 
After an extensive engineering process over several years, Holden Special Vehicles fitted the LS7 to a special edition model, the [[HSV W427|W427]]. The HSV-tuned engine produces 375kW (503hp) and 640Nm, making it the most powerful car ever built in Australia. The W427 was unveiled at the [[Melbourne International Motor Show]] on the 29th February, 2008<ref>[http://www.smh.com.au/news/national/revealed-our-fastest-most-expensive-road-car/2008/02/28/1203788544765.html Revealed: our fastest, most expensive road car - National - smh.com.au<!-- Bot generated title -->]</ref> and went on sale in August 2008.
 
Applications:
* 2006-2008 [[Chevrolet Corvette#C6 Z06|Chevrolet Corvette Z06]]
* 2008 [[HSV W427]]
 
===LS7.R===
The '''LS7.R''' engine is a variation of the LS7 used in the highly successful [[Chevrolet Corvette C6.R|C6.R]] [[American Le Mans Series]] racecar.  It was crowned as Global Motorsport Engine of the Year by a jury of 50 race engine engineers on the [[Professional Motorsport World Expo]] 2006 in [[Cologne]], [[Germany]].
 
===LSX===
At the 2006 [[SEMA]] show, GM Performance Parts introduced the LSX engine, an all-new cast-iron racing block based on the LS7 engine. It was designed with help from drag racing legend [[Warren Johnson]].  It offers displacements ranging from 364 cubic inches to 511 cubic inches (4.25" Bore x 4.5" Stroke) and is capable of withstanding 2500 bhp.  This block incorporates two extra rows of head-bolt holes per bank for increased clamping capacity. The six bolt steel main caps are the same ones used on the LS7 engine. The engine debuted at the auto show in a customized 1969 Camaro owned by [[Reggie Jackson]]. The LSX will be available starting the second quarter of 2007, set to be available in authorized dealerships and retailers on March 31, 2007.<ref name='Edmunds Reggie Jackson article'>{{cite web | first= Ed| last= Hellwig| title= 2006 SEMA Show - Reggie Jackson Camaro| date= 2006-10| url= http://www.edmunds.com/insideline/do/AutoshowArticles/articleId=117396| work = Edmunds Inside Line| accessdate = 2007-08-30}}</ref>
 
===LS9===
The '''LS9''' is a 6.2&nbsp;L ({{convert|6162|cc|CID|disp=s|abbr=on}}) supercharged engine, based on the LS3; the LS7 block was not used due to the higher cylinder pressures created by the supercharger requiring the thicker cylinder walls of the LS3. Cylinder dimensions are now 4.06&nbsp;in (103.25&nbsp;mm) bore with a 3.62&nbsp;in (92&nbsp;mm) stroke. It is equipped with an Eaton four-lobe [[Roots type supercharger]]. Power output is {{Convert|638|hp|kW|0|abbr=on}} at 6500&nbsp;rpm and {{auto lbft|604}} of torque at 3800&nbsp;rpm.
 
Applications:
* 2009 [[Chevrolet Corvette C6 ZR1|Chevrolet Corvette ZR1]]
 
===LSA=== 
The supercharged 6.2&nbsp;L '''LSA''' is similar to the LS9 and scheduled to debut in the 2009 Cadillac CTS-V. The LSA has been SAE certified at {{convert|556|hp|kW|abbr=on}} @ 6100rpm  and {{convert|551|lbft|Nm|abbr=on}} of torque @ 3800rpm. GM labels it "the most powerful ever offered in Cadillac’s nearly 106-year history". The LSA features a smaller 1.9&nbsp;L capacity supercharger rather than the 2.3&nbsp;L variant of the LS9. Other differences include a slightly lower 9.0:1 compression ratio, single unit heat exchanger and cast pistons.
 
Applications:
* 2009 [[Cadillac CTS V-Series]]
 
==Vortec engines==
{{for2|information on GM Vortec engines|[[GM Vortec engine]]}}
 
Versions of both the Generation III and Generation IV V8 have also been used in trucks and SUVs.  These are usually branded as GM Vortec engines.
 
==Problems==
 
In the early production run of the LS-series engine, some engines encountered abnormal amounts of 'piston slap' - a problem caused by too much clearance between the cylinder bore and the piston. <ref name='Piston Slap'>{{cite web | title= GM Piston Slap| url= http://www.pistonslap.com/index.html| accessdate = 2007-08-30}}</ref> 'Piston Slap' sometimes sounds more like a knock or the sound of a [[diesel engine]] running, it is also typically worse when the engine is cold and lessens as the engine reaches operating temperature.  The noise of 'Piston Slap' often is louder when listening for it below the [[oil pan]].
 
==See also==
* [[GM Small-Block engine]] - Generation I
* [[GM LT engine]] - Generation II
* [[Chevrolet Corvette]]
* [[Holden Commodore]]
* [[Holden Special Vehicles]]
 
==References==
<div class='references-small'>
<references/>
</div>
 
==External links==
* [http://www.autospeed.com/cms/A_2054/article.html LS1 article at AutoSpeed] 
* [http://www.autospeed.com/cms/A_2062/article.html LS2 article at AutoSpeed]
* [http://ls1tech.com/forums/ LS1Tech Forums]
 
[[Category:GM engines|LS]]
[[it:GM Serie LS]]

Latest revision as of 15:28, 3 February 2009

The 20NE is a fuel-injected, four cylinder engine developed by General Motors.

This was the first overhead cam (OHC) engine from Opel, featuring milestone technologies like:

  • Aluminum head.
  • Cross flow design
  • Multi point fuel injection
  • Electronic ignition/fuel injection.
  • Over Head Cam

This was "the" beginning of all the later Opel petrol engines. This was the first time the cast iron block found in most newer 2 liter Opel engines was featured.

Engine 20SEH
Configuration Inline, SOHC, Transverse 4 Cylender
Displacement 1998cc (121.88 cu in)
Bore 86.0mm (3.4in)
Stroke 86.0mm (3.4in)
Power 116 BHP
Compression ratio 9.5:1
Valve-Train Belt Driven, 2 Valves per Cylender
Engine Management Bosch, Motronic ML 4.1
Firing order 1-3-4-2
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