Here in this article you will learn about the L83 Engine Specs , Performance, Cylinder Heads, Cam Specs & More, Let’s discuss the ford L83 Engine Specs , Valvetrain, performance, and Reviews.
This guide contains engine specifications for the fifth-generation L83B and L8B engines of General Motors, which were launched in 2014.
These LT-based engines are often referred to as EcoTec3 5.3L engines.
These small blocks are made of all aluminum and include Active Fuel Management (AFM), Variable Valve Timings (VVT), as well as being flex-fuel-capable (E85).
Direct fuel injection technology is also used in the engines.
This means fuel is injected directly into the combustion chamber and not through the intake runner.
The L83 and L8B engines differ because the L8B has GM’s eAssist powertrain.
This combines the traditional gas-powered engine and an electric motor. The eAssist powertrain offers additional:
The L8B also uses stop/start technology. This will turn off the engine when there are no traffic lights or slow, stop-and-go traffic.
In place of an alternator, the machine uses a BAS3 or Belt Alternator Starter. BAS3 is used to recharge the battery and restart the engine after it has shut down.
The alternator is the only major component of both machines.
L83/Block Specs |
|
|---|---|
| Displacement | 5.3L / 325 c.i.d. |
| Bore Dia. | 3.780 in. |
| Stroke | 3.622 in. |
| Deck Height | 9.240 in. |
| Bore Spacing | 4.400 in. |
| Thrust Bearing Location | #3 Main, 1/2 thrust |
| 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. |
| Part Number | 12620290 |
| Material | 319-T7 Aluminum |
Engine Ratings |
|
|---|---|
| Compression Ratio | 11:1 |
| Horsepower Rating | 355-380* hp @ 5,600 rpm |
| Torque Rating | 383-416* ft.-lbs. @ 4,100 rpm |
L83 Valvetrain Specs |
|
|---|---|
| Lifter Body Diameter | 0.842 in. |
| Pushrod Dimensions | 7.85 in. (long) x 0.342 (dia.) |
| Rocker Arm Mounting Style | Pedestal |
| Rocker Arm Style | Die-Cast, Roller Fulcrum |
| Rocker Ratio | 1.8 |
| Rocker Offset | None |
| Valve Spring Style | Beehive |
| Valve Spring Color | Natural |
| Intake Valve Angle | 12.5° / Splayed 2.61° |
| Exhaust Valve Angle | 12.0° / Splayed 2.38° |
| Intake Valve Material | Steel, Solid Stem |
| Intake Valve Dia. | 1.928 in. |
| Exhaust Valve Material | Steel, Sold Stem |
| Exhaust Valve Dia. | 1.556 in. |
| Timing Chain Guide Style | Spring-Loaded Tensioner |
| Lifter Style | Hydraulic Roller |
| Lifter Link Style | Plastic Lifter Tray |
L83 Cam Specs |
|
|---|---|
| Duration @ .050 in. (int./exh.)* | — |
| Valve Lift (int./exh.)* | — |
| Lobe Separation Angle* | — |
| Cam Gear Attachment | 1-Bolt |
| Cam Gear Poles | 4X |
| Active Fuel Management (AFM) | Yes |
| Variable Valve Timing (VVT) | Yes |
| Part Number | 12619823 |
L83 Rotating Assembly Specs |
|
|---|---|
| Piston Volume | 0cc (net) |
| 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 Part Number | 12607475 |
| Crankshaft Material | Cast Iron |
| Crankshaft Part Number (Wet Sump) | 12619781 |
| Crankshaft Main Journal Dia. | 2.559 in. |
| Crankshaft Rod Journal Dia. | 2.100 in. |
| Reluctor Wheel | 58X |
| Harmonic Balancer | Iron |
| Piston Style | Domed (with reliefs for the exhaust valve and direct injector) |
| Piston Material | Hypereutectic Cast Aluminum Alloy |
L83 Cylinder Head Specs |
|
|---|---|
| Material | 319-T7 Aluminum |
| Combustion Chamber Volume | 57.6cc |
| Intake Runner Volume | 248cc |
| Exhaust Port Shape | Flat Oval |
| Exhaust Runner Volume | 102cc |
| Cylinder Head Bolt Style | Torque to Yield (TTY) |
| Cylinder Head Bolt Size | (10) M12 x 1.75, M8 corner bolts |
| Casting Number | 12620214 |
| Intake Port Shape | Rectangle |
L83 Engine Review
The L83 is a 5.3L V8 engine manufactured by General Motors, belonging to the EcoTec3 family of engines. It is installed in a range of GM vehicles, including the Chevrolet Silverado and GMC Sierra, as well as the Chevrolet Tahoe, Suburban, and the Cadillac Escalade.
Full review YouTube video check here.
L83 Engine Specs FAQ
Is a L83 an LS motor?
The new 5.3L L83 direct-injected 5.3L makes more power than its LS cousin and can compete with the Gen III, Gen IV LQ4 6L Vortec Mills.
Are L83 engines good?
They are abundant, robust, and reliable, starting to appear in classic trucks, hot rods, and muscle cars.
They were rated at 355 to 380 horsepower and 383-416 pounds in stock. Ft.
What engine is the L83 in?
Gen. 5 and L8B 5.3L small block engines are used in GM trucks, SUVs, and other vehicles. These engines are also known as EcoTec3 5.3L engines.
They are made of all aluminum and feature Active Fuel Management (AFM), Variable Vave Timing (VVT), as well as Flex Fuel Capability (E85).
Is a L83 a LT engine?
There are five LT engines available, including the EcoTec3-based LT-based EcoTec3 truck engine: LT1, LT4, L83, and L8B.
Like LS engines, checking the 8th digit on the Vehicle Identification Number (VIN) is the best way to determine which LT engine it is.
What year was the L83 used?
The L83 was only available for two years ( 82, 1984) and featured GM’s new Cross-Fire Fuel Ignition system.
Critics often refer to it as one of the least worthy engines to make its way under the Corvette’s hood.
What are L83 heads?
The L83 head was designed specifically for the stock displacement, 5.3L Direct Injected engine.
It delivers improved cylinder fill in lower RPM ranges and substantial airflow increases in the higher Ranges. Our tests have shown a 30 hp improvement while increasing torque below the curve.