General Motors LS Series Engines

8/11/2019 General Motors LS Series Engines

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A N E W E R A I N A U T O M O T I V E T E C H N O L O G Y

General Motors LS Series

Engines


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New Beginnings

Original enginedesignated LS1

In 1997, General Motors

revolutionized theautomotive industry.

First ground-up redesignof small-block Chevy V8s

Third generation of SBC

Introduced in the 1997Chevrolet Corvette.


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Features

All aluminum block andheads. Minimized weight

2-Valve pushrod design High-flow intake manifolds

Large, single plate throttlebodies


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Revolution!

GM shocked the autoindustry with this newdesign

345 horsepower, 350 ft-

lbs tq. Massive power from

simple pushrod design.

Competing engines

suffered overlycomplicated designs More complex means less

reliable

Comparable Ford V8, noterelative complexity


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Other Applications

GM used LS designs inmany applications

Same design for other

performance cars Chevrolet Camaro, Pontiac

Firebird

Iron-block versions for

trucks/SUVs


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Performance Advantages

Simple design meanshigher reliability

Single cam means cheap

horsepower increases Possible 50hp/50ft-lb. gains

from $500 in parts

Massive aftermarket

Performance parts arecheap and plentiful


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Moving Forward

LS Engines continuouslyevolve.

New head/camshaft

designs almost yearly. LS6 released for 2003

Z06 Corvette 405 hp, 400 ft.-lbs tq.

Improved intake manifold,camshaft, heads


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Moving Forward (cont.)

LS2 introduced in 2005 Corvette

400hp, 400 ft-lb tq

Increased displacement from 5.7L to 6.0L

New intake, LS6 heads and camshaft

Also used in:

Pontiac GTO, Chevrolet SSR, Chevrolet Trailblazer SS


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Cars Featuring the LS2

05-09 Chevrolet Corvette

05-06 Pontiac GTO

05-06 Chevrolet SSR

06-07 Chevy Trailblazer SS


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Other Engines

LS7 introduced for C6Z06 7.0L displacement

505 hp, 470ft-lbs tq

LS3 introduced as LS2replacement

6.2L displacement

Used in C6 corvettes, 5th

genCamaros


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Supercharged Variants

Supercharged variantsof LS3

LS9 used in ZR1

corvette. 638hp, 604ft-lbs tq

LSA used in CadillacCTS-V, ZL1 Camaro

556hp, 551ft-lbs tq


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By the Numbers

Designation Displacement Horsepower Torque Notes

LS1 5.7L 345hp 350tq The Original

LS6 5.7L 405hp 400tq New intake, cam,and heads

LS2 6.0L 400hp 400tq New intake, LS6cam/heads,increaseddisplacement

LS7 7.0L 505hp 470tq All-out race engine

LS3 6.2L 430hp 424tq Redesigned LS2,increaseddisplacement

LSA 6.2L 556hp 551tq Supercharged LS3

LS9 6.2L 638hp 604tq Supercharged high-performance LS3

* Does not include iron block truck variants


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Final Notes

My final note is an exhaust note. Enjoy!

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General Motors LS Series Engines