What does the “LS” in Chevy motors stand for?

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Obsessed

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LS is the designation for a revamped small block Chevy engine back in the late 90s to differentiate from older small block Chevys. That is the simple story. It becomes a major marketing term after that.
 

stealyerface

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As far as vehicle models, as far as "Silverado LS versus an LT", it means nothing. It is simply a trim level moniker left over from the olden days when it used to mean "Luxury Sport"

Engine wise, it became just an easy way to identify the option code for which engine you had on your car.

After 28 years, I have memorized all the codes, and a lot of folks don't know that if you open your glove box (on trucks) or the trunk (on cars) there is a white sticker that lists all of the options that the car or truck has on it.

Things like G80 (locking differential) all the gear ratios, GT4, GU3, GT5 etc..., trailer towing (Z82) Snow plow prep kit (VYU) etc...

So, when talking with your buddies about cars, you could say, "Hey, do you have the LS3" or," I have the small-block LSxxx".

The LS engine related to the small-block, 6-bolt V8 that was kind of a new blueprint for the new model V8.

So, in short, it didn't actually stand for anything initial wise, it was just the option code that became a shorthand version of truck-talking.

~syf
 

stormsedge

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Unknown...likely internal GM yabbajabba to cloke the development. Followed the LT series engines, but not a step backwards.
 

beninma

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We engineers like to do silly things.

It could be something as weird as a code where the L & S get converted to some numbers and it means something odd like the 15th crankcase revision and the 21st head revision.

Luxury Sport would be pretty hilarious applied to a pickup truck.
 

Toto'sDad

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We engineers like to do silly things.

It could be something as weird as a code where the L & S get converted to some numbers and it means something odd like the 15th crankcase revision and the 21st head revision.

Luxury Sport would be pretty hilarious applied to a pickup truck.

Not necessarily. If you're a redneck okie that made it big, it makes perfect sense! :D
 

unixfish

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To quote Butterscotch Horseman, "...while your brain is still loose and stupid." Loose and Stupid?

Well, no, but that is what came to my mind...
 

RiverDog

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FB_IMG_1574877815939.jpg
 

dkmw

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As pointed out, LS is just the internal code for the revised small-block.

Most companies have some kind of alphanumeric code for their engines. Porsche has M96s etc., BMW has N54s and S55s etc.
 

telemnemonics

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Seems GM regularly used designations that buyer enthusiasts got excited about on our own, like ZL-1, Z-28, L-88, LT-1 etc etc.
No meaning.

AFAIK the LS motor got stronger mains webbing, roller lifter provision in the block, no distributor, better port paths, and maybe better cooling jacket in with secure head bolt provision to button the whole set of improvements up into a cheaper higher power recipe for the masses.
 

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It's just an engine code, just like my 454 is a L29...

To all of you LS haters, I'll post this one again, stock bottom end, stock heads, just a cam, valve spring swap, and a big ass turbo... ;)

$3800 tied up in the whole project, look up sloppy mechanics on YouTube.

I liked this vid the first time it was posted. Still thinking it has a high stall speed torque converter in it, but yeah similar time and top speed as my 454 powered '34 Chevy. LS haters just don't know.:cool:
 

Obsessed

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Seems GM regularly used designations that buyer enthusiasts got excited about on our own, like ZL-1, Z-28, L-88, LT-1 etc etc.
No meaning.

AFAIK the LS motor got stronger mains webbing, roller lifter provision in the block, no distributor, better port paths, and maybe better cooling jacket in with secure head bolt provision to button the whole set of improvements up into a cheaper higher power recipe for the masses.
Yup, I think you just summed up the big picture.
 

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The newer DI motors are back to LT. The 2016 Camaro, Corvette and trucks got the LT1, the LT4 is the supercharged version in the hotter Corvette and ZR1 Camaro.

The LS6 in the 70s was a big block 454 with alloy heads in the hotter Corvette, in the early noughties it was an alloy 5.7 with 400hp in the ZR6 Corvette and CTS-V Cadillac vs the alloy LS1 with 350hp in a entry Camaro. LS7 was the atmo 7.0l 427, LS9 the 6.2 litre supercharged from the C6 hot Corvette.

The older 3.6 alloy DOHC V6 was the LY7, first DI version was L76 IIRC, the DI 3.0 was the LF0, ditto the fours also have their own series moniker so you can tell if it's a truck, SUV or turbo luxury trim.
 
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