Utinator

What cubic inch, or liter size does each LS number represent? I know I have a 5.7L LS-1 engine in my Gen. 4 Camero SS. That should be about a 350ci. I've always been a Chevy guy, so I am somewhat familiar with the engines. I just never heard of these LS numbers until I got the Camero.

What are the other LS engines?

Do they have an LS# for my 6.6L Durtymax?

clinebarger

All GM engines have 3 digit codes beginning with "L"....

The engine in my Camaro is a L92, My 2006 Duramax is a LBZ, My Tahoe has a LM7 5.3L........

RPM WS6

iTrader: (3)

"LS1" is just an RPO (Regular Production Order/Option); as mentioned above, all GM engines are represented by a 3-digit code such as this (and most or all have been reused several times so, depending on the era/year, that same code might represent two very different engines and/or displacements.)

These RPOs exist as factory shorthand for the various options on a given car (they are printed on the SPID, Service Parts Identification, sticker for reference - and this sticker can be found on the driver's door jamb on a 4th gen F-body; you will find many of these codes for a given car which detail all of its specific option information.)

Multiple engines of the same displacement may have different RPOs, even from the same year/era, based on other differences between them (e.g. LS3 and L99 were both, most recently, 6.2L V8 engines, but they have differences not related to overall displacement which warrant different RPOs.) So, you can't necessarily say that any particular displacement is tied to only one RPO.

Also, your vehicle is actually a Camaro, not a Camero, and the LS1 found in a 4th gen Camaro is a 5665cc/345.7ci engine (generally rounded to 5.7L/346ci).

cookseyb

Auto correct thinks CAMARO is spelled wrong and tries to change it to CAMERO for whatever reason.. FWIW..

RPM WS6

iTrader: (3)

Really? I haven't seen this myself. It doesn't recognize Camaro for me either, but the options given are Carom/Macaroon/Caro. Nothing about a CamEro.

Interesting.

Utinator

That's interesting. I know my Duramax is the LLY (best) version. I am also aware of the other "L" numbered Duramax engines. I didn't know there were so many different L-numbered gas engines though.

So, can we get a list of all the L's and the displacement they represent? I'm only interested in gas engines here.

As mentioned before, the LS1 would look like this:
-LS1 = 5.7L/346ci (1996-2002 ?)
-LS2 = ????
-LS(etc)

RPM WS6

iTrader: (3)

Going back how far? Again, all these RPOs have been used before, sometimes several times before, so there is no fixed displacement (or even cylinder count) for a given RPO unless you're speaking of a specific year or range of years. If you want a comprehensive list starting from the introduction of the Gen III SBC V8 (LS1) that's fine, but if you include all gas engines since that time the list would be huge. Or do you want just the Gen III-V small block V8s from 1997 to present day?

Utinator

Yes, that. That is mostly what we are discussing on this forum anyway.

cam

iTrader: (9)

https://en.wikipedia.org/wiki/LS_bas...l-block_engine

clinebarger

While the LLY had a better injector design than the LB7.....They also had a poor flowing air intake, Too small of a radiator, And several wire chaffing issues.
The LBZ & LMM had even better (Low Voltage "12volt") injectors that eliminated the FICM, Better Donaldson air intake, larger radiator, 6 speed Allison.

The LB7 & LLY did have stronger Mahle pistons though......

Utinator

The LLY gets better fuel mileage than the LBZ and LMM. With an ECO/Tow tune it puts out about the same hp/torque (and even more MPG). The LBZ/LMM won't get near the fuel mileage as the LLY, even with a tune. The power/fuel economy of the LLY is just right. BUT, we're not here to discuss diesels.....

fastassls1maro

iTrader: (22)

the LLY's had headgasket issues, ask me how i know(lly owner). I think they all get roughly the same fuel economy when driven the same way. LBZ to current also have the 6spd allison. I like my LLY but if i could have found a nicer LBZ for roughly the same price i would have bout it instead.

Utinator

The Wiki link has some good info. I copy/pasted the table (towards the bottom) into an Excel sheet, but I can't get it to paste here.

I think that pretty much covers this topic.