Oldsmobile Updates Aurora Engine

This weekend’s Indy Racing Northern Light Series will feature two debuts.

Kentucky Speedway makes its first appearance on the IRNLS schedule with the Belterra Resort Indy 300. The other first, which is a surprise of sorts, is the first appearance of the updated Oldsmobile Aurora engine.

GM Racing released and IRNLS officials approved a revised cylinder head design and
corresponding engine management calibration updates that will produce more mid-range torque and quick throttle response.

"GM Racing has completed extensive dynamometer development and track testing programs to validate the new engine specification," said Joe Negri, GM Racing IRL/Road Racing Group manager. "The feedback from the IRL drivers who have tested the new components is overwhelmingly positive, and they are looking forward to running the new package at Kentucky Speedway."

The centerpiece of the revised Aurora V8 engine kit is a new cylinder head with high-velocity ports that are optimized for the 3.5-liter displacement limit that took effect in January.

"The new port design is intended to enhance efficiency across the engine's operating range while maintaining excellent high-rpm performance," Negri said. "The improvement in mid-range torque and throttle response will be readily apparent on 1-mile tracks. On 1.5-mile ovals such as Kentucky Speedway and Texas Motor Speedway, the IRL Aurora V8's broader torque curve will improve acceleration on restarts and will enhance the quality of the racing as drivers work their way through traffic."

All IRNLS teams should receive the updates in time for the race on Sunday.

Oldsmobile has already clinched its fourth consecutive IRL Engine Manufacturers championship, and an Oldsmobile driver is a lock to win the Rookie of the Year title. The races for the driver and team championships are still wide open, however.

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