INDIANAPOLIS — On the second floor of an upscale steakhouse downtown, just days before their engines would be put to the test against each other in the Indianapolis 500, engineers from Chevrolet and Honda sat side by side and shared a toast.
In a collaboration of auto manufacturer rivals, they had worked to push the IndyCar Series into a new era.
Over in the corner, sitting on a stand, was the product of their work: a hybrid unit that will fit neatly inside the existing chassis from Dallara and works with each manufacturer’s existing 2.2-liter, twin-turbocharged V-6 engines. Once installed, the unprecedented design promises to dramatically alter the way races are run on North America’s top open-wheel circuit.
“It’s going to be a massive shift,” said Team Penske driver Scott McLaughlin. “We think we’ve got some sort of an idea of what it will do from the testing we’ve done previously with the hybrid. But it’s going to be different for everybody.”
They will find out precisely how different this weekend.
After no hiccups during a final full-field test on June 11, the hybrid system is poised to make its debut on Sunday at Mid-Ohio Sports Car Course in an IndyCar regular-season race presented, quite fittingly, by the 2025 Honda Civic Hybrid.
“I think we’re well placed for this,” said Arrow McLaren team principal Gavin Ward, whose teams in Formula 1, the international open-wheel circuit, already are familiar with hybrid systems. “We were keen to have hybrid. We were very keen for the hybrid system in general. We’re looking for a new car. We’re keen for areas for us to really catch up.
“Frankly, this is an opportunity for us.”
IndyCar photo by Chris Owens via AP / IndyCar will start using hybrid units like this one beginning with Sunday’s race at Mid-Ohio Sports Car Course. The open-wheel series had hoped to begin hybrid racing at the start of the year, but delays have led to a midseason debut.HOWDY, PARTNER
The push to engine hybridization began in earnest years ago, when Chevrolet and Honda wanted to better align their racing programs with a shift in consumer demand toward hybrid and electric vehicles.
Still, automakers in the United States face slowing EV sales even while investing billions to produce them in hopes that Americans will embrace battery-powered rides. Last year, the sale of electric and hybrids jumped to more than 16% of all light-duty sales, according to the U.S. Energy Information Administration.
At first, engineers struggled to fit a wholly unique hybrid unit into an IndyCar chassis designed more than a decade ago and work with engines that had been honed over nearly as long. It wasn’t until engineers from Chevrolet and Honda — bitter rivals on the track, but compatriots in this particular effort — chose to each focus on a small part of the greater whole that the project took off.
Chevrolet turned its attention to the motor generator unit, which produces electricity when a driver brakes or changes throttle position. Honda focused on the energy storage system, where the electricity is stored in 20 ultracapacitors.
The pieces work in concert in a system that fits into an empty space inside the bellhousing, between the engine and gearbox.
Beginning with its first real test last August at Florida’s Sebring International Raceway, the hybrid system has been put through more than 20,000 miles over the course of its development. Teams have tried it everywhere from oval tracks such as Indianapolis Motor Speedway and World Wide Technology Raceway near St. Louis to permanent road courses at Barber Motorsports Park in Alabama and Road America in Wisconsin.
“The partnership between Chevrolet and Honda has been phenomenal,” said Jay Frye, the president of IndyCar. “The IndyCar-specific hybrid power unit is dynamic and an engineering marvel, and we’re completely committed to its successful introduction.”
So committed that, despite numerous delays that cost IndyCar its chance of introducing the hybrid system at the start of the year, the decision was made to implement the technology at Mid-Ohio, right in the middle of the current season.
It would be like changing the rules of a football game at halftime, except that football players aren’t hitting 200 mph on a race track.
“We just want to make it introduced at the right time,” Ward said, “and I think midseason is pretty aggressive.”
AP photo by Darron Cummings / A.J. Foyt Racing driver Santino Ferrucci, left, talks with his crew after a practice session for the Indianapolis 500 on May 24. Ferrucci said IndyCar’s introduction of a hybrid system for its race cars starting this weekend is “something that our series needs.”NOT SO NEW
“The world is changing. We all know that,” said David Salters, the president of Honda Racing. “We want to be part of that, be responsible. We want to educate our engineers. And we want to show off what we can do. Racing is meant to have a form of innovation, and it does. This is new.”
In some ways, IndyCar has been playing catch-up in the race to hybridization.
Formula 1 began tinkering with kinetic energy recovery systems 15 years ago, and new engine regulations a decade ago made hybrid engines standard. Similar designs have been used at prestigious 24-hour endurance races for sports cars, such as Le Mans and Daytona, while an entire series — Formule E — has championed fully electric cars for the past decade.
NASCAR is expected to introduce a prototype of an electric stock car this weekend at its race in Chicago.
In other ways, the product produced by the engineering teams at Chevrolet and Honda is entirely novel.
Rather than relying on heavy batteries to store energy, such as the hybrid systems found in other racing series, IndyCar has turned to ultracapacitors. While ultracapacitors may not hold as much power, they have some advantages: They are much lighter and provide quick, powerful boosts, which can be deployed by drivers similar to the existing push-to-pass button.
The boost provides about 120 extra horsepower, pushing the total for IndyCar engines over 800 for the first time in decades.
“This system, it’s our first start, really,” said Eric Warren, the executive director of global motorsports competition for General Motors, which houses the Chevrolet brand. “It gives us an option that can fit in the current car. It’s something the teams can digest. It gives more control to a driver, and as an engineer, of course we like more options. And it gives you a different strategy where you deploy.”
It should speed up races in another way: Drivers can use the electric power to fire their own engines. In the past, crew members would have to use an external electric motor to crank the engine at the beginning of a race or if a car stalled.
AP photo by Tom E. Puskar / Colton Herta leads the field as the green flag drops for an IndyCar race at Mid-Ohio Sports Car Course in July 2023. The same track will host the open-wheel series this weekend as it debuts a hybrid system for its race cars.Arrow McLaren isn’t the only team with hybrid experience. Most of the major IndyCar teams — Penske, Andretti Global, Chip Ganassi Racing and Rahal Letterman Lanigan Racing, among others — have worked with them through their IMSA sports cars programs, which went hybrid last year. Andretti has a Formula E team; so does IndyCar owner Roger Penske’s son, Jay.
When it comes to the drivers, most have tested the hybrid system enough that they have an idea what to expect. But they also admit the learning curve will be sharp as they learn the new setup’s nuances, such as when to deploy that extra shot of power.
“I think it’s something that our series needs,” said Santino Ferrucci, who drives for A.J. Foyt Racing. “As far as technology goes, adding in that hybrid is going to add in a completely different dynamic to a driver, and I think it’s going to make the series more challenging, and it’s going to be more rewarding to those that can process faster, be more adaptable.”
Still, the hybrid system also marks the end of an era in IndyCar.
“We grew up falling in love with this sport with the framework of what it is now. At the same time if you look at where the world is going, where manufacturers are going, you’ve got to evolve,” Arrow McLaren driver Alexander Rossi said. “It’s an exciting time for the series to take that step towards the future. It’s something that’s important to all of us and the partners involved.”