GM 5.5 Liter LT6 V8 Engine
The LT6 is a 5.5-liter, eight-cylinder, dual-overhead cam engine from General Motors that made its debut in the 2023 Chevrolet Corvette Z06.
|Displacement:||6.2L / 333.3 cu. in.|
|Vehicles:||Corvette C8 Z06|
|Introduced:||2023 model year|
|Assembly:||Performance Build Center, Bowling Green, Kentucky|
The GM LT6 engine is naturally-aspirated, displacing 5.5 liters in a V-8, Dual Overhead Cam (DOHC) configuration with a flat-plane crankshaft which allows it to rev to a sky-high 8,600 redline.
|Type:||LT6 5.5L V8 VVT|
|Bore x stroke (in / mm):||4.104 x 3.150 / 104.25 x 80|
|Block Material:||A319-T7 sand-cast aluminum with pressed-in iron cylinder liners and four-bolt main bearing caps|
|Oiling System:||Dry sump (8-qt. capacity); includes oil-spray piston cooling|
|Oil Type:||Dexos R 5W50 synthetic|
|Cylinder Head Material:||A356-T6 cast aluminum|
|Combustion Chamber volume:||58.8cc|
|Valvetrain:||Dual overhead camshafts with mechanical finger follower valvetrain and dual-coil valve springs|
|Valve Size (in / mm):||1.654 / 42 titanium (intake) & 1.378 / 35 sodium filled (exhaust)|
|Fuel Delivery:||Exhaust side direct injection; Max pressure: 5,076 psi (35 Mpa / 350 bar)|
|Throttle body:||87mm single bore (electronic)|
|ECU:||GM E68 (32-bit processing)|
|Model Year||Make||Model||Power (hp/kW @ RPM)||Torque (lb-ft/Nm @ RPM)||Transmission|
|2023||Chevrolet||Corvette C8 Z06||670 / 500 @ 8,400||460 / 623 @ 6,300||8-Speed Dual-Clutch|
Despite its LT designation, the LT6 will have nothing in common with GM’s fifth-generation Small Block overhead valve (push-rod / OHV) engine family, which includes the following motors:
- 6.2L V-8 LT1 naturally-aspirated
- 6.2L V-8 LT4 supercharged
- 6.2L V-8 LT5 supercharged
- EcoTec3 family:
- 4.3L V-6 LV3 naturally-aspirated
- 4.3L V-6 LV1 naturally-aspirated
- 6.6L V-8 L8T naturally-aspirated
Instead, the LT6 engine represents an all-new, sixth-generation DOHC V8 engine family that’s derived from the 4.2L Cadillac Blackwing engine (RPO Code LTA). In addition, the LT6 will derive the LT7, a twin-turbocharged version of the LT6 that will be used in the C8 ZR1 and C8 Zora.
500 miles for the street, 1,500 miles for the track.
Fixing it will take a few months.