Cadillac twin-turbo V8
| Cadillac Twin-Turbo V8 | |
|---|---|
| Overview | |
| Manufacturer | General Motors |
| Also called | LTA |
| Production | 2018-present |
| Layout | |
| Configuration | 90° V8 |
| Displacement | 4,192 cc (256 cu in) |
| Cylinder bore |
|
| Piston stroke |
|
| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Valvetrain | Dual overhead cam |
| Compression ratio | 9.8:1 |
| Combustion | |
| Fuel system | Direct injection |
The Cadillac Twin-Turbo V8 (GM RPO LTA) is a twin-turbo DOHC V8 engine produced by General Motors for use in Cadillac vehicles. It is a clean-sheet engine design as well as Cadillac’s first-ever twin-turbo V-8 engine. The engine was branded as the "Blackwing V8" by GM technicians, and is the first Cadillac-exclusive V8 engine since the Northstar V8 was dropped in 2011.[1]
The aluminum cylinder block that houses a lightweight rotating assembly composed of a forged steel crankshaft, forged steel connecting rods and high-strength aluminum pistons.
The turbos are mounted in a hot-V configuration and their twin-scroll design broadens their performance capability, offering quicker response and greater efficiency. The turbochargers produce up to 20 pounds of boost (1.38 bar) and are matched with electronic wastegate control for more precise boost management and more responsive torque production. 90 percent of the engine’s peak torque is available at 2000 rpm and carried through 5200 rpm.
The engine features the following highlight characteristics:
- Twin-scroll turbochargers
- Electronic wastegate control
- Twin water-to-air charge coolers
- Twin throttle bodies
- Direct injection
- Dual-independent camshaft phasing
- Active Fuel Management / Cylinder Deactivation
- Variable-pressure oiling system
- Stop/start technology
All versions are currently slated to be equipped with the 10L90 10-speed automatic transmission and Cadillac's all-wheel drive system.
Versions
| Years | Model | Power | Torque |
|---|---|---|---|
| 2018-present | Cadillac CT6 | 500hp @ 5,000-5,200 rpm | 553lb-ft @ 2,600-4,600 rpm |
| V-Sport: 550hp @ 5,700 rpm | V-Sport: 627lb-ft @ 3,200-4,000 rpm |