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Discussion Starter · #1 ·
Ok, I confess.
I am lost when people start throwing LS? stuff around.
I'd like to know what they all are so I can remember them.

Dave
 

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LS3 400-330hp, '70+
LS4 454-235hp
LS3 402-300hp in'71...240hp in '72
LS5 454-365hp in '71...270hp in '72 - LS5 (was also 360 HP in '70).
LS6 454-450hp, '70


And there is the LS1 for new cars.. But i don't know anything about it.

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Shai

1972 Chevelle Malibu custom 4dr
Restoration started: February 10th 2001
TC member #1278
 

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Discussion Starter · #4 ·
Thanks Shai!

Were did you get that info.
I have been searching stuff for a week.

What about the L88 or other L codes?

I know, PITA.
 

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I saw this topic and started to reply when I reliezed that we exhausted it a while back. I didn't realize how long ago though. Anyways, it was way back in March of 2000, but the information is still solid.

Enjoy - http://www.chevelles.com/forum/Forum10/HTML/000381.html

This is why this site is great, it has all this stuff saved so that you can quickly get an answer. I love it.


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Bryan Shook
My website with lots of classic cars
1972 Chevrolet El Camino Options, Codes & Pricing
Favorite Quote: Some people have shrinks. Some people have their garage.
 

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Discussion Starter · #6 ·
Thanks Bryan!


That was the post I was looking for. I just didn't think it was T/C 2000! My how time flies!

Thanks again.

I printed that out and am hanging it on my cube wall. Just for decoding purposes



Dave
 

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<BLOCKQUOTE>quote:</font><HR>Originally posted by SS_Dave:
Thanks Shai!

Were did you get that info.
I have been searching stuff for a week.

What about the L88 or other L codes?

I know, PITA.


<HR></BLOCKQUOTE>

Very easy


L14* Refers to: = 307 CID STD V8 (from 72 Chevelle)
L22 Six Cylinder 250
L26 230-140hp
L30 327-275 Hp
L34 396-350 Hp
L35 396-325 Hp
L48 350-300hp, '69+
L61 230 cid
L65 350-250hp, '69+
L72 427-425hp Yenko, '69
L73 327-250hp, '68
L74 327 300hp
L77 4 barrel carb, 283-220 hp
L78 396-375 Hp
L79 327-350 Hp
L89 396-375hp, Aluminum Heads
LF6 400-255hp 2 bbl, '70 (Monte Carlo)
LM1 350-255hp, '69
LT4 400-180hp
L65 350-145 2 barrel
L90 Six cylinder




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Shai

1972 Chevelle Malibu custom 4dr
Restoration started: February 10th 2001
TC member #1278
 

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<BLOCKQUOTE>quote:</font><HR>Originally posted by SS_Dave:
Were did you get that info.
I have been searching stuff for a week
<HR></BLOCKQUOTE>

Right in this very site.
http://www.chevelles.com/shop/options.html


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Shai

1972 Chevelle Malibu custom 4dr
Restoration started: February 10th 2001
TC member #1278

[This message has been edited by ChaosMalibu (edited 12-07-2001).]
 

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Forgot the LS7
 

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At least up to 71, here's how GM lists them:
L22 L-6 Engine - 250 Cu. Inch.
L26 L-6 Engine - 230 Cu. In.
L30 V-8 Engine - 327 Cu. In.
L34 V-8 Engine - 396 Cu. In. Hi-Perf.
L35 V-8 Engine - 396 Cu. In.
L36 V-8 Engine - 427 Cu. In. Hi-Perf.
L46 V-8 Engine - 350 Cu. In.
L48 V-8 Engine - 350 Cu. In.
L62 P-6 Engine - Hi-Perf.
L63 P-6 Engine - Spec. Hi-Perf.
L65 V-8 Engine - 350 Cu. In. (2 Bbl. carb.)
L66 V-8 Engine - 396 Cu. In. (2 Bbl. Carb.)
L68 V-8 Engine - 427 Cu. In. - Hi-Perf. - Tri Carb.
L71 V-8 Engine - 427 Cu. In. - Spec. Hi-Perf. - Tri Carb.
L72 V-8 Engine - 427 Cu. In. - Spec. Hi-Perf.
L73 V-8 Engine - 396 Cu. In. - Spec. Hi-Perf.
L78 V-8 Engine - 396 Cu. In. - Spec. Hi-Perf.
L79 V-8 Engine - 327 Cu. IN. - LD - Spec. Hi-Perf. (Hyd. Lifters)
L85 L-6 Engine - 250 Cu. In. (4 Bbl Carburetor)
L87 P-6 Turbo Charged Engine
L88 V-8 Engine - 427 Cu. In. Heavy Duty
L89 Aluminum Cylinder Heads
LF7 V-8 Engine - 327 Cu. In. (2 Bbl Carb.) (Reg. Fuel)
LM1 V-8 Engine - 350 Cu. In. (4 Bbl Carb.) (Reg. Fuel)
LS1 V-8 Engine - 427 Cu. In. (4 Bbl Carb.) (Reg. Fuel)
LS3 V-8 Engine 400 Cu. In. 4 Bbl. Carb.
LS4 V-8 Engine 454 Cu. In. 4 Bbl. Carb.
LS5 V-8 Engine 454 Cu. In. 4 Bbl. Carb. Hi-Perf.
LS6 V-8 Engine 454 Cu. In. 4 Bbl. Carb. Spec. Hi-Perf.
LS7 V-8 Engine 454 Cu. In. 4 Bbl. Carb. Heavy Duty
LT1 V-8 Engine 350 Cu. In. Special High Performance



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Dale McIntosh
TC Gold #92/ACES #1709
67SS & 67 Elky
Dale's Place
Team 67
 

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But remember that the options codes were reused in later years. Like the LS1 and LS6.

For instance, LS1 that was a 427 in 60-70's is now used for the 5.7L in the newer Camaro's, Firebirds and Corvett's.


Mike
2001 GMC SLT Extended Cab 5.3L LM7 Z71
2002 Firebird Trans Am WS6 Ram Air 5.7L LS1

[This message has been edited by elcamino (edited 12-08-2001).]
 

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A couple of additions to this as well as the archived list:

The L89 thing is correctly listed sometimes and incorrectly others. It is in fact an aluminum head option and was availble on 396/375's in Camaros, Novas and Chevelles, and 427/435's in Corvettes. Some engines such as the L88's in three years of Corvette only and the ZL1 available in Corvette and Camaro,and the 71 only Corvette only LS6 were only available with aluminum heads, so the L89 designation wasn't used. Some parts books list an engine code for a 70 Chevelle with an LS6 with aluminum heads, but I've never heard of a documented example and don't think the L89 designation would've been used.

There are two designs of L88's correctly referred to as Heavy Duty. Many publications and numbers books now incorrectly list the L88's factory horsepower rating as 435 also and I've even seen it done in recent GM literature. At the time these engines were installed in cars, they were factory rated at 430, intentionally 5 less than the Spec. High Perf. 427's which carried the 435 rating. Even though the L88 was an RPO, GM did everything possible to discourage the general public from ordering it, including the lower HP rating. The first design L88's installed in 67,68 and early 69 Corvettes were closed chamber and had a slightly milder camshaft profile than the second design open chamber engine which came along after the first of the year in '69. The second design engine with it's more radical camshaft and open chamber heads was the exact same as the ZL1 with the exception of the aluminum block. The LS7 engine is nothing more than a second design L88 with the stroke of the 454 substituted for the 427 and it's generally thought that the full crate motors were delivered with open chamber iron heads instead of the L88's aluminum ones. The LS7 was factory underrated at 460 HP but is night and day stronger than the LS6.

Far as the LS5's go, in addition to the 360 horse Chevelle engine in '70, they were placed in Corvettes and rated at 390HP. The two were identical except for the exhaust manifolds. The LS5 also continued into the 71 Corvette and I believe the horsepower rating was lowered to 365. Although I had an orginal engined 71 LS5 Chevelle about 10 years ago, I can't remember the HP rating. (335?????????)

The LS6 was rated at 450 HP in the Chevelle in 1970. The lower intake was in anticipation of it being placed in the 70 Corvette which it wasn't. When the LS6 finally did make the Corvette in 71, it was outfitted with alum. open chamber heads and the rating was dropped to 425. It's widely thought that there was never an LS6 factory installed in a production 71 Chevelle.

Compression ratios of interest:
LS6 Chevelle: 11.25:1 (closed chamber)
LS6 Corvette: 9.??:1 (open chamber)
427/425 & 435: ll.25:1 (closed chamber)
L88 1st des. 12.5:1 (closed chamber)
L88 2nd des., ZL1, LS7,: 12:1 (open chamber)

Note: there's also been some flip flopping over the years whether these engines were ll:1 or ll.25:1 and I'm not sure which is accurate, but I've always used 11:25.
 
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