On Friday, Chevrolet finally announced one of the highly-anticipated 2019 Silverado engines. The result of a clean-sheet design intended specifically for trucks, the motor displaces 2.7 liters in a Dual Overhead Cam (DOHC) configuration, features a single dual-volute turbocharger and features a long piston stroke of 4.01 inches (102mm), resulting in an SAE-rated 310 horsepower and 348 pound-feet of torque.
Moreover, the technological marvel – which will be made at the GM Spring Hill plant in Tennessee – features an innovative valvetrain for high- and low-lift valve profiles, allowing for completely different camshaft profiles and valve timing at low and high speeds, thereby enabling excellent performance across the board. The engine’s chief engineer, Tom Sutter, says that “it’s like having different engines for low- and high-rpm performance.”
And now, we have the complete specs for the new engine, which we recently found out has been assigned RPO code L3B.
|Type||2.7L I-4 Turbo|
|GM RPO Code||L3B|
|Valvetrain||Dual-overhead camshafts, four-valves per cylinder, tripower valvetrain with continuously variable valve timing, variable valve lift and Active Fuel Management|
|Valves Per Cylinder||4|
|Block Material||380 T5 cast aluminum|
|Cylinder Head Material||356 T5 cast aluminum|
|Bore x Stroke (in. / mm)||3.63 x 4.01 / 92.25 x 102|
|Air Delivery||Single dual-volute turbocharger with electronically controlled wastegate; intercooling system. 22-psi / 1.5 bar max boost|
|Fuel Delivery||High-pressure direct injection (3000 psi / 20 MPa) and electronic throttle control; Active Fuel Management"|
|Ignition System:||High-energy coil-on-plug|
|Additional Features||Continuously variable oil pump; electric water pump; engine oil cooler, automatic stop/start, Active Thermal Management, exhaust manifold integrated in cylinder head|
|Assembly Site||Springhill, Tennessee, USA|
|Power ((hp / kW) @ RPM)||310 / 231 @ 5600|
The new 2.7L Turbo I-4 L3B engine will be standard on the LT and RST trim levels of the 2019 Silverado 1500, where it will be mated with an improved eight-speed automatic transmission. We expect the motor to also make its way to the 2019 GMC Sierra 1500, though GMC has yet to confirm this.
Stay tuned for more GM 2.7L L3B engine news coverage from GM Authority.