Andretti has updated its shelved second generation powertrain in preparation for season three, reports Motorsport.com.

The site reports that the team, which had developed its own powertrain for season two but which had reverted to the original spec system after a troubled testing period, will be ready to get its new car on track for testing in the coming months.

The Andretti-designed ATEC-01 was intended to race in season two, but after a series of issues in the group tests held at Donington Park in August, the team chose to revert to the season one powertrain.

Since then, work has continued on the motor and inverter in an effort to get the systems reliable for a debut in season three, which will begin this autumn.

The ATEC-01 package was put together by the Andretti team in conjunction with its partners TE Connectivity and Houston Mechatronics for a proposed season two program.

“There were two options that we had with the ATEC-01 going forwards,” Andretti team principal Roger Griffiths told Motorsport.com this week.

“We could continue with the current homologation which limits you to changes, but we chose to re-submit a new homologation which effectively makes it an all-new car.

“It gives us much more freedom to make wholesale changes to the packaging, the design of the motor or the design of the inverter. Our intention is to see this project through and get it racing it in season three.”

Andretti is allowed to test privately from January 1, and Griffiths is planning for the team to undertake the first track tests as soon as possible.

“We will test it and start our 15 allocated test days, probably in the late spring,” he confirmed.

motorsport.com