The defining metrics of the Gen3 engine process

Five key metrics have headlined the paritising of the Gen3 engine process.

Gen3 engines, which will make their racing debut in 2023, have been a key part of the new Gen3 project.

From 2023, General Motors and Ford will compete with 5.7-litre and 5.4-litre engines respectively.

It marks a shift away from current cars, which are currently powered by 5.0-litre engines.

As detailed in the latest Gen3 Unpacked episode, five key factors were taken into account to achieve parity between the different capacity engines.

They are power, fuel usage, weight, centre of gravity (COG) and moment of inertia (MOI).

“We will measure the performance of the engine,” category head of motorsport Adrian Burgess says.

“We’ll measure the fuel consumption, we’ll measure the CoG, the moment of inertia.

“They give us their offering, their engine to be homologated, and then we paritise it.

“Then we give it back to the teams, and then they go and race it, knowing they’ve got the same as the next guy.”

There will also be a single supplier per manufacturer.

Current-specification engines built by KRE Race Engines are used by Triple Eight Race Engineering, Team 18, Team Sydney, Matt Stone Racing and Brad Jones Racing.

Walkinshaw Andretti United and Erebus Motorsport cars are powered by Walkinshaw Racing engines.

Dick Johnson Racing is supplied by Mostech Race Engines, while Tickford Racing and Kelly Grove Racing build their own engines.

Burgess reiterated that GM and Ford have been "really involved" with the process along with respective homologation teams Triple Eight and DJR.

“We share all out information across the pond, and obviously here with the engine homologation teams,” he says.

“It’s a very collaborative process.”

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