What is the firing order of an eight-cylinder engine?

[Queiroz]

An eight-cylinder engine's firing order is arranged in two groups of four cylinders each, forming a V-shaped configuration. Here is additional information: 1. Eight-cylinder engine: The eight-cylinder engine is one of the cylinder arrangement types of internal combustion engines. In the United States, IRL, ChampCar, and NASCAR all require the use of eight-cylinder engines. 2. Crankshaft types: There are two different types of eight-cylinder engines based on the crankshaft. The vertical plane is the typical structure of eight-cylinder engines in American transportation vehicles. Within each group (four cylinders per group), each crank is offset by 90° from the previous one, forming a vertical structure when viewed from one end of the crankshaft. This vertical plane achieves excellent balance. The flat plane refers to cranks offset by 180°. Because counterweights are not needed, the crankshaft is lighter with lower inertia, allowing for higher RPM and acceleration.