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Thread: LS3 engine specs
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05-11-2018, 05:29 PM #1
LS3 engine specs
Performance Specifications
Compression Ratio 10.7 : 1
Horsepower Rating 426-436 hp.
Torque Rating 420-428 ft./lbs.
Application Information
VIN 8th Digit
Year
Make
Model
2008-13
Chevrolet
Corvette (Base and Z51)
2009
Pontiac
G8 GXP
2010-13
Chevrolet
Corvette Grand Sport
2010-15
Camaro SS (with manual trans.)
2014-17
SS
N/A
2009-15
Holden
HSV
2015-17
Commodore VF
**The Corvette Grand Sport used a special version of the LS3. It had a dry sump oiling system and a modified crankshaft.**
**The Austrailian vehicles use a different format for Vehicle Identification Numbers (VIN). The 8th digit is NOT the engine code in an Austrailian VIN code.**
Engine Block Specifications
Block Part Number
12584724
Material
Aluminum
Casting Number
12621766
Displacement
6.2L / 376 c.i.d.
Bore Dia.
4.065 in.
Stroke
3.622 in.
Deck Height
9.240 in.
Bore Spacing
4.400 in.
Thrust Bearing Location
#3 Main
Main Cap Style
6-Bolt
Main Housing Bore Dia.
2.751 in.
Cam Housing Bore Dia.
Bore 1/5 = 2.346 in. Bore 2/4 = 2.326 in. Bore 3 = 2.307 in.
Cam-to-Crank Centerline
4.914 in.
Rotating Assembly Specifications
Engine Version
Wet Sump
Dry Sump
Piston Material
Hypereutectic Cast Aluminum Alloy
Piston Style
Flat Top
Piston Volume
0cc
Wrist Pin Dia.
0.9431 in. (Full Floating)
Connecting Rod Material
Powdered Metal
Connecting Rod Style
I-beam
Connecting Rod Length
6.098 in.
Connecting Rod Housing Bore
2.225 in.
Connecting Rod Bolts
M9 x 1 x 43
Connecting Rod P/N
12649190
Crankshaft Material
Cast Iron
Forged Steel
Crankshaft P/N
12597569
12630431
Crankshaft Rear Flange
6-Bolt
Crankshaft Main Journal Dia.
2.559 in.
Crankshaft Rod Journal Dia.
2.100 in.
Reluctor Wheel
58X
Cylinder Head Specifications
Casting Number
821
Material
Aluminum
Combustion Chamber Volume
70cc
Intake Port Shape
Rectangle
Intake Runner Volume
257cc
Exhaust Port Shape
D-Port
Exhaust Runner Volume
87cc
Intake Valve Dia.
2.165 in.
Exhaust Valve Dia.
1.590 in.
Cylinder Head Bolt Style
Torque to Yield (TTY)
Cylinder Head Bolt Size
(10) M11 x 2 x 100, (5) M8 x 1.25 x 45
Camshaft Specifications
Engine Version
Wet Sump
Dry Sump
Duration @ .050 in. (int./exh.)
204°/211°
Valve Lift (int./exh.)
0.551 in./.525 in.
Lobe Separation
117°
Camshaft P/N
12623066
12631811
Cam Gear Attachment
1-Bolt
3-Bolt
Cam Gear Poles
4X
Active Fuel Management (AFM)
No
Variable Valve Timing (VVT)
No
Valvetrain Specifications
Lifter Style
Hydraulic Roller
Lifter Link Style
Plastic Lifter Tray
Lifter Body Diameter
0.842 in.
Pushrod Length
7.385 in.
Rocker Arm Mounting Style
Pedestal
Rocker Arm Style
Die-Cast, Roller Fulcrum
Rocker Ratio
1.7
Rocker Offset
Intake Rocker, 6.25mm
Valve Spring Style
Beehive
Valve Spring Color
Natural
Valve Angle
15 degrees
Intake Valve Material
Steel, Hollow Stem
Intake Valve Dia.
2.165 in.
Exhaust Valve Material
Steel, Solid Stem
Exhaust Valve Dia.
1.590 in.
Timing Chain Guide Style
Spring Loaded Tensioner
Other Specifications
Intake Manifold
Car-Style
Throttle Body
90mm, 4-bolt, Gold Blade
Throttle Control
Electronic (Drive-by-Wire)
Fuel Injector P/N
12576341
Fuel Injector Flow
42 lb./hr. @ 58 psi
Flex Fuel Capable (E-85)
No
Fuel Injector Length (between O-rings)
1.500 in.
Fuel Injector Connector
EV6-USCAR
PCM
E38
Crankshaft Reluctor Ring
58X
Camshaft Sensor
Front mount, 4X
Oil Pan Sump Location
Varies by model
Oil Pump
Standard Volume (.96 c.i. per rev. @ 33 psi)
Oil Pump Part Number
12678151 (wet sump), 12623097 (dry sump)Cold Air Intake, Muffler Delete, Vinci High Performance Dual Valve Springs, Hardened Pushrods, Yella Terra 1.85 Rockers, Some Hydropdipped Stuff, Strut Tower Brace, Some SS Badges, boost/vacuum gauge, fuel pressure gauge, some checkered stripes, drilled/slotted rotors, ZL1addons Stealth wickerbill, Ruxifey LED side markers
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