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== Background ==
The brainchild of [[Chevrolet]] chief engineer [[Ed Cole]], the [[Chevrolet small-block engine (first- and second-generation)|first generation of the Chevrolet small-block engine]] was first unveiled in the 1955 [[Chevrolet Corvette (C1)|Chevrolet Corvette]] and [[Chevrolet Bel Air]], both powered by the {{cvt|265|cuin|cc|sigfig=4}} "Turbo-Fire." The 265 Turbo-Fire distinguished itself from other engines of the era such as [[Cadillac|Cadillac's]] [[Cadillac V8 engine#331 series|331 series]] of the late 1940s and early 1950s by reducing the size and weight of various components within the engine; a compact [[engine block]] combined with a light [[valvetrain]] gave the Turbo-Fire a {{cvt|40|lbs|kg|sigfig=2}} weight reduction compared to the [[Chevrolet Stovebolt engine#235|inline-sixes]] (despite having two more cylinders) that initially powered the first generation of the Corvette, alongside a significant horsepower increase of 25%. This contributed to lowering the Corvette's {{cvt|0-60|mph|km/h}} from 11 seconds to 8.7.<ref name=":4">{{Cite news |last=Stenquist |first=Paul |date=2013-01-18 |title=Talking About a New Generation: A Redesigned Engine for Corvette |language=en-US |work=The New York Times |url=https://www.nytimes.com/2013/01/20/automobiles/talking-about-a-new-generation-for-the-corvette.html |access-date=2023-03-22 |issn=0362-4331 |archive-date=March 22, 2023 |archive-url=https://web.archive.org/web/20230322084345/https://www.nytimes.com/2013/01/20/automobiles/talking-about-a-new-generation-for-the-corvette.html |url-status=live }}</ref><ref name=":0">{{cite magazine|magazine=[[Machine Design]]|title=From blue flame six to LT5|volume=65|issue=17|page=32|id={{ProQuest|217149408}}
Nicknamed the "Mighty Mouse," the Turbo-Fire soon became popular within the hot rodding community too, along with scoring wins in [[stock car racing]].<ref name=":1" /> A larger version of the Turbo-Fire arrived in 1957, now [[Boring (manufacturing)|bored]] out to {{cvt|3.875|in|mm|sigfig=3}}. This gave the new engine a total displacement of {{cvt|283|cuin|cc|sigfig=4}}; this newer version was dubbed the "Super Turbo-Fire." The Super Turbo-Fire was also the first engine offered with [[mechanical fuel injection]]. The top-of-the-line model produced {{cvt|283|hp|kW PS|0}}, giving it a 1:1 cubic inch to horsepower ratio;<ref name=leg/> this lowered the Corvette's {{cvt|0-60|mph|km/h|0}} to 7.2 seconds.<ref name=":0" />
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=====LS1=====
When introduced in the 1997 Corvette, the LS1 was rated at {{cvt|345|hp|0}} at 5,600 rpm and {{cvt|350|lbft|0}} at 4,400 rpm.<ref>{{Cite journal |last=Amann |first=Richard W. |last2=Damico |first2=Mark A. |last3=Green |first3=Brian |last4=Hahn |first4=Charles J. |last5=Haider |first5=Ameer |last6=Juriga |first6=John W. |last7=Mantey |first7=Creighton A. |date=1997-02-24 |title=1997 GM 5.7 Liter LS1 V8 Engine |url=https://www.sae.org/content/970915/ |journal=SAE Technical Paper |doi=10.4271/970915}}</ref> After improvements to the intake and exhaust manifolds in 2001, the rating improved to {{cvt|350|hp|0}} and {{cvt|365|lbft|0}} ({{cvt|375|lbft|0}} for manual-transmission Corvettes.<ref>{{cite web |url=https://www.caranddriver.com/reviews/a15132706/2005-chevrolet-corvette-z51-road-test/)|title=2005 Chevrolet Corvette Z51 |date=September 2004 }}</ref><ref>{{cite web |url=http://www.gmperformanceparts.com/Parts/showcase_detail.jsp?engine=2 |title=LS Engines - Small Block Engine - Crate Engine |publisher=GM Performance Parts |date=March 24, 2011 |access-date=January 25, 2012 |url-status=live |archive-url=https://web.archive.org/web/20111230121232/http://www.gmperformanceparts.com/Parts/showcase_detail.jsp?engine=2 |archive-date=December 30, 2011 |df=mdy-all }}</ref> The LS1 was used in the Corvette from 97 to 04. It was also used in 98-02 GM F-Body (Camaro & Firebird) cars with a rating of over {{cvt|305|–|345|hp|0}}, which was rumored to be conservative. The extra horsepower was claimed to come from the intake ram-air effect available in the SS and WS6 models. In Australia, continuous modifications were made to the LS1 engine throughout its lifetime, reaching 382 hp/376 ft-lb in the [[Holden Special Vehicles|HSV's]] VYII series, and a [[Callaway Cars Incorporated|Callaway]] modified version named "C4B" was fitted to HSV GTS models producing {{cvt|400|bhp|0}} and {{cvt|376|lbft|0}} of torque.<ref name="ls1">{{cite web|url=https://gmauthority.com/blog/gm/gm-engines/ls1/|publisher=GM Authority|access-date=October 22, 2021|title=GM 5.7 Liter V8 Small Block LS1 Engine|date=June 13, 2016|archive-date=September 24, 2024|archive-url=https://web.archive.org/web/20240924071139/https://gmauthority.com/blog/gm/gm-engines/ls1/|url-status=live}}</ref>
Applications:
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|{{Cvt|320-325|hp|kW|0}} at 5200 rpm
|{{Cvt|345-350|lbft|Nm|0}} at 4400 rpm
|-
|1999–2000
|[[Holden Commodore (VT)#Series II|Holden VT II Commodore]]
|{{Cvt|295|hp|kW|0}} at 5000 rpm
|{{Cvt|329|lbft|Nm|0}} at 4400 rpm
|-
|2000–2002
|[[Holden Commodore (VX)|Holden VX Commodore]]<br />[[Holden Ute#VU|Holden VU Ute]]
|{{Cvt|302|hp|kW|0}} at 5200 rpm
|{{Cvt|340|lbft|Nm|0}} at 4400 rpm
|-
|2000–2002
|[[Holden Commodore (VX)#HSV range|HSV VX/VU]]
|{{Cvt|342|hp|kW|0}} at 5600 rpm
|{{Cvt|350|lbft|Nm|0}} at 4000 rpm
|-
|2002–2004
|[[Holden Commodore (VY)|Holden VY Commodore]]
|{{Cvt|302-315|hp|kW|0}} at 5200 rpm<br />{{Cvt|329|hp|kW|0}} at 5600 rpm
|{{Cvt|350|lbft|Nm|0}} at 4400 rpm<br />{{Cvt|343|lbft|Nm|0}} at 4000 rpm
|-
|2002–2004
|[[Holden Commodore (VY)#HSV range (Y Series)|HSV Y Series]]
|{{Cvt|349|hp|kW|0}} at 5600 rpm<br />{{Cvt|382|hp|kW|0}} at 5800 rpm
|{{Cvt|350|lbft|Nm|0}} at 4000 rpm<br />{{Cvt|376|hp|kW|0}} at 4800 rpm
|-
|2004–2005
|[[Holden Commodore (VZ)|Holden VZ Commodore]]
|{{Cvt|315|hp|kW|0}} at 5600 rpm<br />{{Cvt|335|hp|kW|0}} at 5600 rpm
|{{Cvt|339|lbft|Nm|0}} at 4000 rpm<br />{{Cvt|347|lbft|Nm|0}} at 4800 rpm
|-
|2004
Line 152 ⟶ 182:
|[[HSV GTO]]
|{{Cvt|342-382|hp|kW|0}} at 5600 rpm
|{{Cvt|350|lbft|Nm|0}} at 4400 rpm
|-
|1999–2005
|[[Holden Caprice#WH|Holden WH Statesman]]
|{{Cvt|295|hp|kW|0}} at 5000 rpm
|{{Cvt|323-343|lbft|Nm|0}} at 4400 rpm
|-
|2001–2005
|[[Holden Monaro]]
|{{Cvt|302-328|hp|kW|0}} at 5200 rpm
|{{Cvt|339-343|lbft|Nm|0}} at 4400 rpm
|-
|2005–2005
|[[Holden Commodore (VZ)#HSV range|HSV Z series Avalanche]]
|{{Cvt|362|hp|kW|0}} at 5700 rpm
|{{Cvt|350|lbft|Nm|0}} at 4000 rpm
|}
[[File:Chevrolet Corvette C5 Z06 LS6 engine.jpg|thumb|250px|GM LS6 engine in a [[Chevrolet Corvette (C5)#Z06|Chevrolet Corvette Z06]]]]
Line 174 ⟶ 209:
LS6 intake manifolds were also used on all 2001+ LS1/6 engines. The casting number, located on the top rear edge of the block, is 12561168.
The [[SSC Ultimate Aero TT]] also utilized the LS6 block, albeit with an enlarged [[
Applications:
Line 722 ⟶ 757:
* 2007–2014 [[GMC Yukon XL]] 1500
*=====LH8=====*
The LH8 was introduced in 2008 as the V8 option for the Hummer H3. It was the simplest, most basic 5.3L V8 of its family, lacking any special technologies. Also known as the Vortec 5300, the LH8 was available in the H3 and GM mid-size pickups through 2009.
Line 770 ⟶ 805:
* 2006–2013 [[Chevrolet Corvette (C6)#Z06|Chevrolet Corvette Z06]]
*2008–present [[Spada Codatronca]]
*2008–2009 [[HSV E Series|HSV W427]]
*2009–2016 [[Zenvo ST1]]
* 2013 [[Chevrolet Corvette (C6)#427 Convertible|Corvette 427 Convertible]]
Line 779 ⟶ 815:
=====LS427=====
The '''LS427''' is a {{cvt|7011|cc|L cuin|1}} engine based on the LS7
Unlike the LS7, the LS427 uses a conventional wet-sump oiling system with an F-body aluminum oil pan and wet-sump pump, eliminating the need for an external oil tank and plumbing required by the LS7's dry-sump system. This change makes the engine easier to install in a wider range of vehicles.
Peak output is {{cvt|570|bhp|PS kW|0}} and {{cvt|540|lbft|Nm|0}} of [[Torque#Machine torque|torque]] with a 7000 rpm redline.<ref>{{Cite web|url=https://www.chevrolet.com/performance-parts/crate-engines/ls/ls427-570|website=chevrolet.com|title=GM LS427/570|access-date=July 17, 2023}}</ref>▼
▲
Other changes include fifth-generation Camaro Z/28 exhaust manifolds and a 14 in manual transmission flywheel from the Z/28 platform, replacing the LS7’s stock components. It retains key LS7 features such as forged steel crankshaft, titanium connecting rods, CNC-ported aluminum cylinder heads with 70cc combustion chambers, and a 7000 rpm redline.
The engine is supplied fully assembled with intake manifold, fuel rails, injectors, throttle body, ignition coil packs, balancer, and water pump. It requires a specific LS427/570 engine controller (P/N 19420000) calibrated for this engine.
The LS427 was discontinued in January 2022 along with the LS7.
===4.06 in. bore blocks (2007–2017)===
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* 2010–2015 [[Chevrolet Camaro (fifth generation)|Chevrolet Camaro SS]] (manual only)
* 2008–2017 Holden vehicles including:
** 2008–2013 [[HSV E Series]]
** 2009 [[Pontiac G8|Pontiac G8 GXP]]
** 2014–2017 [[
** 2009–2017 [[Vauxhall VXR8]]
** 2015–2017 [[Holden Caprice#WN|Holden WN II Caprice]]
** 2015–2017 [[Holden Commodore (VF)|Holden VF II Commodore]]
*2012 [[AC 378 GT Zagato]]
*2015 [[SIN R1]] 450
*2016 [[Arrinera Hussarya]]
Line 852 ⟶ 900:
Applications:
* 2009–2013 [[Chevrolet Corvette (C6)#ZR1|Chevrolet Corvette ZR1]]
* 2015 [[Equus Bass 770]]
* 2016 [[Icona Vulcano|Icona Vulcano Titanium]]▼
* 2017 [[Holden Special Vehicles GTS|HSV GTSR W1]]▼
* 2015–present [[SIN R1]] 650
▲* 2016 [[Icona Vulcano|Icona Vulcano Titanium]]
* 2016 [[VLF Destino]]
▲* 2017 [[Holden Special Vehicles GTS|HSV GTSR W1]]
{{Anchor|LSA}}
Line 1,018 ⟶ 1,067:
{{For|the 5.7 L Generation II engine of the same RPO|Chevrolet small-block engine (first- and second-generation)#LT4}}
The {{cvt|6162|cc|L cuin|1|order=flip}} LT4 engine builds on the design strengths of the previous LS9 [[supercharged]] engine used in the sixth-generation Corvette ZR1 and leverages the technologies introduced on the seventh-generation Corvette Stingray, including direct injection, cylinder deactivation, and continuously variable valve timing, to take Corvette performance to an all-new level. The LT4 engine is based on the same Gen 5 small block foundation as the Corvette Stingray's LT1 6.2L naturally aspirated engine, incorporating several unique features designed to support its higher output and the greater cylinder pressures created by forced induction, including: Rotocast A356T6 aluminum cylinder heads that are stronger and handle heat better than conventional aluminum heads, lightweight titanium intake valves, forged powder metal steel connecting rods, 10.0:1 compression ratio, enhanced performance and efficiency enabled by direct injection, forged aluminum pistons with unique, stronger structure to ensure strength under high cylinder pressures, stainless steel exhaust manifolds for structure at higher temperatures, aluminum balancer for reduced mass, and standard dry-sump oiling system with a dual-pressure-control oil pump.<ref>{{Cite web|url=http://gmauthority.com/blog/gm/gm-engines/lt4/|title=GM 6.2 Liter Supercharged V8 Small Block LT4 Engine|website=GM Authority|date=April 16, 2014|language=en-us|access-date=September 8, 2017|url-status=live|archive-url=https://web.archive.org/web/20170911020726/http://gmauthority.com/blog/gm/gm-engines/lt4|archive-date=September 11, 2017|df=mdy-all}}</ref> The engine uses a {{cvt|1.7|L|cuin|1}} Eaton TVS Supercharger. Although smaller than the previous {{cvt|2.3|L|cuin|1}} supercharger used on the sixth-generation ZR1, it spins to 5000 rpm faster thus generating boost quicker while making only slightly less total boost than the LS9 engine.<ref>{{Cite web|url=http://www.gizmag.com/corvette-z06-debut-naias/30441/|title=The torque's the thing: 625-hp Z06 Corvette debuts in Detroit|date=January 13, 2014|website=www.gizmag.com|publisher=Gizmag|last=Mackenzie|first=Angus|url-status=live|archive-url=https://web.archive.org/web/20150906052213/http://www.gizmag.com/corvette-z06-debut-naias/30441/|archive-date=September 6, 2015|df=mdy-all}}</ref> The Escalade-V variant uses a {{cvt|2.7|L|cuin|1}} Eaton TVS supercharger. This engine is also used by [[Scuderia Cameron Glickenhaus]] for their [[SCG 004]]S.<ref>{{cite magazine|url=https://www.roadandtrack.com/new-cars/a13795442/2019-scg-004s-photos-info/|title=2019 SCG 004S: This Is Glickenhaus's Volume Road/Race Car|magazine=[[Road & Track]]|___location=Online|date=November 17, 2017|first=Máté|last=Petrány|access-date=July 18, 2022}}</ref> The limited production [[IsoRivolta GTZ]], which is based on the C7 Z06, also uses the LT4 engine.
Applications:
Line 1,246 ⟶ 1,295:
==Generation VI==
General Motors announced in January 2023 that plans for a sixth generation of small-block were in place, with the company investing $854 million into its various manufacturing plants. The timeline for the release of the new generation is not yet
General Motors has announced that the sixth generation V8 small-block will be produced in Flint, MI and Tonawanda, NY<ref>{{Cite web |date=June 5, 2023 |title=GM To invest more than $1 billion in Flint plants |url=https://news.gm.com/home.detail.html/Pages/news/us/en/2023/jun/0605-flint.html}}</ref><ref>{{Cite web |date=May 27, 2025 |title=GM to invest $888 million in Tonawanda Propulsion plant |url=https://news.gm.com/home.detail.html/Pages/news/us/en/2025/may/0528-GM-invest-888-million-Tonawanda-Propulsion-plant.html}}</ref>
== Engine table ==
Line 1,304 ⟶ 1,355:
| {{convert|3.622|in|mm|1|abbr=on}}
| 9.40:1
| Iron/Iron-Alum. heads,
|-
| 2001–2005
Line 1,670 ⟶ 1,721:
| Aluminum, {{convert|1.7|L|cuin|0|abbr=on}} supercharger, VVT, AFM, DI, dry sump (Corvette)
|-
| 2016–2018
| L8B
| {{convert|355|hp|kW|0|abbr=on}}
| |||