Gibson GK428 engine
Reciprocating internal combustion engine
From Wikipedia, the free encyclopedia
The Gibson GK428 engine is a 4.2-litre normally-aspirated DOHC V8 engine. It has been developed and produced by Gibson Technology for sports car racing since 2017.[3][4]
| Gibson GK428[1][2] | |
|---|---|
| Overview | |
| Manufacturer |  Gibson |
| Production | 2017–present |
| Layout | |
| Configuration | Naturally-aspirated 90° V8 |
| Displacement | 4.2 L (256 cu in) |
| Valvetrain | DOHC |
| RPM range | |
| Max. engine speed | 9,000 RPM |
| Combustion | |
| Fuel system | Electronic indirect multi-point injection |
| Management | Cosworth |
| Fuel type | |
| Output | |
| Power output | 603 hp (450 kW) |
| Torque output | 410 lb⋅ft (556 N⋅m) |
| Dimensions | |
| Dry weight | 135 kg (298 lb) |
| Chronology | |
| Predecessor | Zytek ZG348 |
| Successor | Gibson GL458 |
Development
The engine had been in development since August 2015, prior to being selected as the sole engine supplier for all of the new 2017 regulation LMP2 cars.[5] It shares some architecture with the Zytek ZG348 engine, which previously powered multiple LMP2 cars.[6] The engine has a target for the running costs of about $1,400 per hour, which was tested to last for 50 hours or 8,000 km (5,000 mi) on average.[6][7] During the 2024 4 Hours of Mugello, the engine reached 5,000,000 km (3,106,856 mi) of running since it was introduced.[8]
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