STICKY: LS ENGINE INFO CHEATSHEET WITH, CYLINDER HEAD, ENGINE SIZE, VVT/DOD SPECS, AND VIN I.D. SHEET This is the master guide me and a lot of other guys around here use now, all based on PROVEN stats/info across many stickies and GM spec books. This will help you easily determine CCs of heads, what the engine is, and what RPO code it is by using the 8th digit of the VIN alone
Head differences, then injector flow, then bore/rod sizes, then detailed RPO code stuff WITH VIN IDs!!!!!
----HEAD casting INFO
EVERY 0.007" YOU MILL THEY DROP ~1CC IN COMBUSTION CHAMBER SIZE
----Cathedral port heads
(Cast #, application, port volume, valve size, chamber size) -706/862, 99+4.8/5.3 200/70cc 1.89/1.55 61cc -243/799, 06+ 4.8/5.3, 210/75cc 2.00/1.55 64cc -317, 01+ 6.0 lq4/9 210/75cc 2.00/1.55 72cc
-241, 01-03 ls1, 200/70cc 2.00/1.55 66cc
-853, 99-00 ls1, 200/70cc 2.00/1.55 66cc
-806, 97-98 ls1, 200/70cc 2.00/1.55 69cc -317, IRON heads 99-00 6.0 lq4 only, 210/75cc 2.00/1.55 72cc
----Rectangle port
-364,716, L92, 260/90cc 2.165/1.59 68cc (282/205 cfm flow stock)
-823/821, ls3, 2.165/1.59 68cc (821 just has lighter sodium filled valves)
----Square port
Ls7/LSX only
----Gen 5 heads
-214, L83/L8b, 248/102cc 2.13/1.59 57.6cc
---Wrist pin/bore/rod length and stroke sizes
Stock gen 3 wrist pin .945 pressed
Stock gen 4 wrist pin .945 floating, some early ones are pressed too
4.8l=3.780" bore 3.270" stroke 6.275" rod
5.3l=3.780" bore 3.622 stroke 6.098 rod
5.7l=3.898" bore 3.622 stroke 6.098
6.0l=4.000" bore 3.622 stroke 6.098
6.2l=4.060" bore 3.622 stroke 6.098 LS9 6.2l=4.060" bore 3.622 stroke 5.990 rod
LS7 7.0l=4.125" bore 4.000 stroke 6.067 400CI SBC 4.125" bore 3.75 stroke 350ci sbc 4.00" bore 3.48 stroke
-----Engine ID guide Gen 3/4/5
8TH DIGIT OF GM VINS TELL THE ENGINE RPO CODE
---Aluminum block car engines
(RPO, displacement, equipped extras, 8th digit of vin for ID)
-----Gen 3 engines Ls1 5.7 VIN G
Ls6 5.7 LS1 with 243 heads/revised cylinder liners/block/oiling ----Gen 4 engines
Ls2 6.0 243 heads VIN U
Ls3 6.2 823/821 heads VIN W
L99 6.2 gen 4 DOD/vvt version of ls3 VIN J
Ls4 5.3 gen 4 243 heads/FWD only 5.3 VIN C
Ls7 7.0 gen 4 VIN E
Ls9 6.2 gen 4 VIN R/T
LSA 6.2 gen 4 VIN P -----Gen 5 engines
Lt1 6.2 non supercharged
Lt4 6.2 1.7L/9.5psi Supercharger, vvt/DOD/direct injected
Lt5 6.2 14psi version of Lt4 with titanium rods/forged crank
--Iron block(few exceptions) truck engines
---Gen 3 engines
Lr4 4.8 gen 3 flat top piston VIN V
Lm7 5.3 gen 3, dished piston VIN T
Lm4 5.3 gen 3, alum version of lm7 VIN P
L59 5.3 gen3, flex fuel version of lm7, VIN Z
L33 5.3 gen3, Alum, gen 4 rod VIN B
Lq4 6.0 gen 3 dished piston VIN U
Lq9 6.0 gen 3 flat top piston VIN N ----Gen 4 engines -----6.0L engines --L76 6.0 DOD equipped VIN Y
L98 6.0 non-DOD version of l76, VIN H
L77 6.0 Alum/DOD/flex fuel version of l76 VIN 2
--Ly6 6.0 rectangle port, Flex fuel, VIN K
L96 6.0 non Flex fuel version of ly6 VIN G
--LFA 6.0 aluminum block VIN 5
LZ1 6.0 DOD/vvt version of LFA VIN J -----4.8L engines
-Ly2 4.8 799 head flat top piston VIN C
L20 4.8 vvt version of Ly2 VIN A -----5.3L engines -Lh6 5.3 AFM equipped VIN M Lc9 5.3 DOD and Flex fuel version of LH6 VIN 3
-LMF 5.3 VVT and Flex Fuel 243/799 heads/Flat tops VIN F
-Ly5 5.3 DOD equipped VIN J
Lmg 5.3 flex fuel version of ly5 VIN 0 -Lh8 5.3 aluminum 08-09 H3/Colorado engine VIN L
Lh9 5.3 aluminum/VVT/Flex fuel 10-12 H3/Colorado VIN P -----6.2L engines
--L92 6.2 aluminum vvt VIN 8
L9h 6.2 gen 4 FF version of the l92 VIN 2
--L99 6.2 gen4 DOD/vvt vers. of ls3 VIN J
L94 6.2 gen 4 flex fuel vers l99 VIN F
----Gen5 (all gen5 are aluminum block)
L86 6.2 truck version of Lt1 VIN J
--L83 5.3 gen 5 VIN C
L8b 5.3 gen 5 hybrid application version of L83
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