IndyCar reducing hybrid power output amid constant failures to start season
· Yahoo Sports
Midway through IndyCar's season, the series is altering the usage of cars' hybrid powertrains. IndyCar is reducing the power output of its hybrids for this weekend's Grand Prix at Road America, the series confirmed to IndyStar.
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The change comes after various hybrid failures throughout the first nine races this year, which caused supply concerns due to the number of hybrid units that had to be replaced. Ahead of the Bommarito Automotive Group 500 two weekends ago, IndyCar said, "A two-week break before Road America will allow suppliers the time needed to ensure the spare quantity needed for the upcoming summer schedule and push towards the finish of the 2026 championship."
As that break ends, IndyCar has decided that the solution to manage the hybrid units is to decrease the energy limit. The hybrid limit at Road America will lower from 600 kilojoules (kJ) of energy per lap last year to 535 kJ this weekend.
"As part of IndyCar's evaluation of hybrid power unit supply, a recommendation was made by the Energy Storage System (ESS) manufacturer, to reduce the lap energy limit," IndyCar said in a statement to IndyStar. "After review, IndyCar is reverting to the validated electricity flow average as introduced in 2024 and for the start of the 2025 season for this weekend’s event at Road America.
"The move is aimed to help reduce thermal load and aging of the ESS cells, which will help with robustness of the hybrid power unit, stabilize system fallout and assist with unit supply. Following this weekend’s event, IndyCar will re-evaluate the update to determine additional implementation this season."
Introduced in the middle of the 2024 season, hybrid powertrains are an Energy Recovery System (ERS) that provides additional horsepower to a car when deployed. Hybrids have two main parts: The ESS and the Motor Generator Unit (MGU). Honda Racing Corporation USA and Skeleton Technologies manufacture the ESS, while Chevrolet and Ilmor manufacture the MGU in collaboration with Empel.
The ESS — which is made up of 20 supercapacitors — stores energy that can be deployed by the low-voltage MGU. After a driver has deployed said energy, they can regenerate it to the ESS to be harvested again for future deployment.
In the nearly two years that the hybrid has been in IndyCar, failures have become too common, drawing the ire of teams and drivers. The severity of the failures varies, as some cars are able to drive even if the powertrains shut down, but some failures completely shut off engines.
At the Detroit Grand Prix on May 31, six-time IndyCar champion Scott Dixon experienced a hybrid failure within the first 10 laps of the race. His No. 9 Chip Ganassi Racing Honda continued until Lap 69, when his engine shut down, ending Dixon's day in 24th.
"I think if you did a poll (of) the drivers or a WhatsApp group, I think it'd be 100%, get rid of them," Dixon said at the Bommarito Automotive Group 500. "But there's bigger things than us, and I don't know what to tell you about that."
Alexander Rossi experienced an immediate shutdown after a hybrid failure at the Sonsio Grand Prix on May 9. After jumping out of his No. 20 Ed Carpenter Racing Chevrolet and walking across the IMS pit lane to his timing stand, Rossi expressed his frustrations with the powertrains.
"I mean, it's pretty annoying to have a failure in the car because of a product that we didn't ask for that doesn't improve the racing," Rossi said. "So that's frustrating."
Now, IndyCar is enacting the energy reduction in hopes of limiting failures while still using the hybrids, which are located between the car's engine and transmission. As the season moves into the summer (the Grand Prix at Road America occurs on the first day of summer), hotter temperatures will place more stress on cars' 2.2-liter, twin-turbocharged V6 engines that operate under extreme thermal loads.
Hybrid powertrains have caused more harm than good to the racing product since being added to cars. In the penultimate season of the current Dallara DW12 chassis and engine formula, IndyCar is trying to heal its hybrid issues. The question is, are the hybrid issues simply a bruise, or are they a larger wound that needs further examination?
Zion Brown is IndyStar's motorsports reporter. Follow him at @z10nbr0wn. Get IndyStar's motor sports coverage sent directly to your inbox with our Motor Sports newsletter. Subscribe to the YouTube channel IndyStar TV: IndyCar for a behind-the-scenes look at IndyCar and expert analysis.
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This article originally appeared on Indianapolis Star: IndyCar reducing hybrid power output amid constant failures to start season