Team Camaro Tech banner

"LS" Engine Designations

9.7K views 14 replies 9 participants last post by  nevrenuf  
#1 · (Edited by Moderator)
I put together a fairly comprehensive list of the production "LS" engines available. I'm lumping all of the GM Gen III and Gen IV car and truck engines under the term "LS". LS is simply the car engine designation for the GEN III and Gen IV GM engines, where the truck engines got an LQ, LM, LY, etc. designation.

I broke them down by displacement, noting whether it was a Gen III or Gen IV engine, iron block or aluminum block, years produced and HP/TQ ranges. I didn't get into the Gen V LT1 engines here. I have gathered this information from several sources over the past few years. In the case that the sources were not in complete agreement, I have listed ranges for HP and TQ.

Gen III and Gen IV engines are both “LS engines”. GM made enough changes to the engine architecture to give the Gen IV engines their own designation, including going from a 24x to a 58x reluctor wheel (crank trigger), moving the cam sensor to the front, adding AFM/DOD and VVT to some, knock sensor relocation, improved ECM/TCM, etc. All "LS" engines got aluminum heads except for the 1999-2000 LQ4's which had iron heads.

Hopefully someone can use this information when deciding on what engine to use in their swap. If anyone catches any mistakes, feel free to note them here.


LS Engine Designations (Gen III & Gen IV)

Glossary
LS = car designation
LQ/LR/LM/LY/LH = truck designation
AFM = Active Fuel Management (same as DOD = Displacement on Demand)
VVT = Variable Valve Timing
Flex Fuel = E85 Compatible



4.8L (293ci) (3.78 bore/3.27 stroke)
LR4 – Iron Block Gen III (1999-2007)
  • 255hp/285-295tq (1999)
  • 270-275hp/285-290tq (2000-2003)
  • 285hp/295tq (2005-2007)
LY2 – Iron Block Gen IV (2007-2009)
  • 260-295hp/295-305tq
L20 – Iron Block Gen IV (2010-present) (VVT) (flex fuel)
  • 260-302hp/295-305tq

5.3L (325ci) (3.78/3.62)
LM7 – Iron Block Gen III (1999-2007)
  • 270hp/315tq (1999)
  • 285hp/315tq (2000-2003)
  • 295hp/335tq (2004-2007)
L59 – Iron Block Gen III (2002-2007) (flex fuel)
  • 285hp/320tq (2002-2003)
  • 295hp/335tq (2004-2007)
LM4 – Aluminum Block Gen III (2003-2004)
  • 290hp/325tq (2003-2004)
L33 – Aluminum Block Gen III (2005-2007)
  • 310hp/355tq (2005-2007)
LY5 – Iron Block Gen IV (2007-present) (AFM)
  • 320hp/340tq (SUV)
  • 315-320hp/335-340tq (truck)
LMG – Iron Block Gen IV (2007-2014) (AFM/2010+ VVT) (flex fuel)
  • 320hp/340tq (SUV)
  • 315-320hp/335-340tq (truck)
LH6 – Aluminum Block Gen IV (2005-2009) (AFM)
  • 300-315hp/330-338tq
LC9 – Aluminum Block Gen IV (2007-2013) (AFM/2010+ VVT) (flex fuel)
  • 320hp/335tq (SUV)
  • 315hp/335tq (truck)
LH8 – Aluminum Block Gen IV (2008-2012)
  • 300hp/320tq
LS4 – Aluminum Block Gen IV (2005-2009) (AFM) (FWD)
  • 303-315hp/323-340tq

5.7L (346ci) (3.89/3.62)
LS1 – Aluminum Block Gen III (1997-2005)
  • 305-325hp (1998-2002 Camaro)
  • 345hp/350tq (1997 Vette)
  • 350hp/365tq (1998-2004 Vette)
LS6 – Aluminum Block Gen III (2001-2005) (high output LS1)
  • 385hp/385tq (2001)
  • 400-405hp/400tq (2002-2005)

6.0L (364ci) (4.00/3.62)
LQ4 – Iron Block Gen III (1999-2007)
  • 300hp/360tq (1999-2000) (iron heads)
  • 300-325hp/360-370tq (2001-2007)
LQ9 – Iron Block Gen III (2002-2007) (high output LQ4)
  • 345hp/390tq
LY6 – Iron Block Gen IV (2007-present) (VVT)
  • 361hp/385tq
L96 – Iron Block Gen IV (2010-2012) (VVT) (flex fuel)
  • 322-360hp/373-382tq
LS2 – Aluminum Block Gen IV (2005-2006)
  • 390-400hp/400tq
L76 – Aluminum Block Gen IV (2008-2009) (AFM/VVT)
  • 361hp/385tq (G8)
  • 367hp/375tq (truck)
L98 – Aluminum Block Gen IV (2006-2010) (Holden)
  • 362hp/391tq
L77 – Aluminum Block Gen IV (2010-2015) (Holden) (AFM) (flex fuel)
  • 362hp/391tq (manual)
  • 348hp/382tq (auto)
LFA – Aluminum Block Gen IV (2008-2009) (AFM/VVT) (hybrid)
  • 332hp/367tq
LZ1 – Aluminum Block Gen IV (2010-2013) (AFM/VVT) (flex fuel) (hybrid)
  • 332hp/367tq

6.2L (376ci) (4.065/3.62)
L92 – Aluminum Block Gen IV (2007-2013) (VVT)(flex fuel 2009+)(AFM 2010+)(truck)
  • 403hp/415-417tq
L94 – Aluminum Block Gen IV (2010-2012) (AFM/VVT) (flex fuel)
  • 403hp/417tq
LS3 – Aluminum Block Gen IV (2008-present) (car)
  • 426-436hp/420-428tq
L99 – Aluminum Block Gen IV (2010-2015) (car) (AFM/VVT) (flex fuel)
  • 400hp/410tq
LS9 – Aluminum Block Gen IV (2009-2013) (car) (2.3 supercharged)
  • 638hp/604tq
LSA – Aluminum Block Gen IV (2009-2013) (car) (1.9 supercharged)
  • 556-580hp/551-556tq

7.0L (427ci) (4.125/4.00)
LS7 – Aluminum Block Gen IV (2006-2015)
  • 505hp/470tq
 
#8 ·
There are a few ways to tell what you have.

-LS engines have the engine size cast into the front of the block (4.8/5.3, 5.7, 6.0, 6.2, 7.0). The 4.8/5.3 block has both numbers cast onto it, not one or the other.

-All iron blocks are truck engines, all car engines have aluminum blocks, but not all aluminum blocks are car blocks.

-Gen IV engines have a front mounted cam sensor on the timing cover and knock sensors are on the side of the block, Gen III have a rear/top of block cam sensor and knock sensors under the intake (on the valley cover).

-Also, the heads have a number cast on them (front of passenger, rear of driver side) that you can then cross reference to see what engines came with those heads. Also the shape of the intake port (cathedral/rectangular/small rectangular) will give you a hint as to what engine it came off. And the shape of the intakes are different as well.
 
#11 ·
Tom you can absolutely put an LS into a first gen Camaro. Its been a popular swap in the hot rodding world for quite a few years now, I have even made the swap myself with a T-56 and it was quiet time consuming but very easy for a first time engine swapper like myself. I would highly recommend looking to Holley to get everything in your car, they may be a little more expensive than other kits but it makes everything drop right in.

As for a used engine, I would review if that is the route you want to take. Depending on what comes with it you may be spending a lot of extra cash to get what you need to make it run. There are some good sources of information here as well with people like Vegas69 who have done this swap countless times.
 
#13 ·
Thank you guys very much for all the great info, I have looked at kit now and also pull outs . Its all very interesting but some how I ended up do both of my Camaros at the same time so I do have limits on what I can do . I most likely will just go with the 489 I have and do a EFI Throttle body on my 68 and then after I finish my 67 I can go back and play with my 68 some more