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Thread: L99 engine specs
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05-11-2018, 05:23 PM #1
L99 engine specs
Performance Specifications
Compression Ratio 10.4 : 1
Horsepower Rating 400 hp.
Torque Rating 410 ft./lbs.
Application Information
VIN 8th Digit
Year
Make
Model
2010-15
Chevrolet
Camaro SS (with auto trans.)
Engine Block Specifications
Casting Number
12584724
Material
Aluminum
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
Piston Material
Hypereutectic Cast Aluminum Alloy
Piston Style
Flat Top, with valve reliefs
Piston Volume
+3cc
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
Crankshaft P/N
12588612
Crankshaft Main Journal Dia.
2.559 in.
Crankshaft Rod Journal Dia.
2.100 in.
Reluctor Wheel
58X
Cylinder Head Specifications
Casting Number
823
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
Camshaft P/N
12623066
Duration @ .050 in. (int./exh.)
195°/201°
Valve Lift (int./exh.)
0.500 in./.492 in.
Lobe Separation
115°
Cam Gear Attachment
1-Bolt
Cam Gear Poles
4X
Active Fuel Management (AFM)
Yes
Variable Valve Timing (VVT)
Yes
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
Valve Spring Style
Beehive
Valve Spring Color
Natural
Valve Angle
15 degrees
Intake Valve Material
Steel, Solid 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
Center Sump
Oil Pump
High Volume (1.25 c.i. per rev. @ 33 psi)
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