Software Development and Stable Regulations: Prototype Competition Set for 2030

As the 2026 IMSA season concludes, we examine the future of the sport.

As the 2026 IMSA season comes to a close, we reflect on the future of the sport.

BMW, Porsche, Cadillac and Aston Martin are among the manufacturers that build endurance racing prototypes.

IMSA provided accommodation so Ars could compete at Petit Le Mans. Ars does not accept paid editorial content.

The rising tide of Drive to Survive has lifted more boats in motorsport than just plain Formula 1 boats. Sportscar racing enjoys international popularity at events such as Le Mans in France, as well as in North America in the IMSA WeatherTech Sportscar Championship. For one thing, multi-hour, multi-class racing lends itself to the broadcast, second-screen age better than linear television, and fans are reaping the benefits: IMSA's audience grew by more than a third domestically and nearly a quarter internationally last year.

It certainly helps to have some of today's hottest racing cars, whether it's hybrid prototypes or GTs, racing versions of road cars from Porsche, Ferrari and others. And it certainly helps that fan access at the races is almost second to none, with open paddocks and grid walks that now see huge crowds approaching the cars just before the start of each race.

"I think we're just scratching the surface," IMSA president John Doonan said. I think in addition to the people here on the ground, there are people when I watch, the people who interact with us on social media, I see that passion come out more. Right on the walk, these fans come up and are so excited to be here. The collection has certainly tried, among other things, to expose local high school students to the industry and has begun a partnership to train more mechanics with ASE.

The 2026 IMSA season concluded at the beginning of the month at Atlanta Road in Georgia. Although the 10 Hours of Petit Le Mans is now the regular finale, it predates the WeatherTech Series as well as its predecessor, the American Le Mans Series, which was first held in 1998 after Elan Pharmaceuticals founder Don Panoz had the bright idea of ​​inviting cars that raced in the French enduro. It worked and led to some classic matches. No one who watched it could forget Alan McNeish's recovery drive in 2008, when he came back two laps after crashing on the grid to hunt down and beat the Peugeots. (Don't take my word for it, watch it yourself.)

The 2026 performance might not have been quite an all-time classic. As is often the case, the weather played its part, suppressing crowds and making life difficult for teams and drivers on track. Nearly four hours were spent behind the safety car, with 16 cautions preventing this year's race from really establishing a rhythm. The first half of the race was dominated by the Acuras and the BMWs were also strong, but in the end the victory went to one of them. Two Porsche 963s – believe it or not, the brand's first prototype won at Petit Le Mans (although in 2015 a slower Porsche 911 RSR GTLM took the overall victory).

This is the real world, not everything in sportscarland is quite easy. War in the Middle East has disrupted both the World Endurance Championship - a series built around the 24 Hours of Le Mans - and a new Asian Le Mans series. And as always, at the top level, the sport is dependent on the size of the producers, something that usually disappears in the face of a worsening economic outlook. Porsche cut its factory prototype program in half last year, parking two of its cars in WEC, leaving just two in IMSA. Heavy bets on an electric car transition that have not materialized, plus the impact of Trump's tariffs on US-made profits, are largely to blame for the decision to pull back.

But Porsche is not alone. Alpine announced earlier this year that it would retire from the WEC at the end of this year. There was hope that Geely, the Chinese carmaker that owns Lotus and Volvo, would save the program. Unfortunately, it became clear just today that this is unlikely to happen and two more cars will go off the grid at the end of the year. Acura is also calling time on its GTP program in IMSA, preferring to focus its motorsports efforts on IndyCar. In doing so, it almost certainly means Honda won't be at Le Mans for the foreseeable future, something many fans were hoping to see.

Then, the end of those other programs means space on the network for others to join. This year Genesis entered the WEC and next year both Ford and McLaren will also join the WEC. So the path is positive.

McLaren will return to endurance racing next year.

But that's the last we'll see of Acura for now.

That all three factory efforts have opted for the IMSA-written LMDh technical regulations over Le Mans' own Hypercar rules says something. Hypercar gives OEMs more technical freedom, including the option to have all-wheel drive hybrid systems or use custom batteries, while LMDh rules mandate common hybrid systems and transmissions, and also require each OEM to start with one of four approved carbon fiber chassis.

The lack of spec components in the hypercar was certainly a factor in Ferrari opting for those rules for their 499P, as well as Toyota with the GR010 (now TR010) and Peugeot with the 9X8. Valkyrie derived from Aston Martin road too. But going that route is more expensive than using some off-the-shelf parts, and is that extra cost even worth it when all the cars perform well and have roughly the same lap times? The process is so frictionless that even though the US is Ferrari's biggest market, we've yet to see a 499P race in IMSA.

"We're fortunate that Aston Martin saw the opportunity to come [to IMSA]. I think we absolutely 100 percent need a set of regulations. I think our vision is that the LMDh has been a pure vote. I think the stability of the rules is really important and it's always been a laboratory for progress in a credible way, but I think it's more stable that we can build the platform rules-wise, just stability and length," Donnan said. "Its age helps."

The good news is that most stakeholders also agree that having two sets of rules is confusing and that from 2030 - when the current rules expire - everyone should be reading from the same page.

The way forward is to have a handle. "And all behind the scenes... there's a lot of talking, a lot of meetings, and they're moving in exactly the same direction," said Urs Kuratle, head of Porsche's prototype program. On the other hand, with the great success of sports car racing in the last four years, we also have great races in the WEC with hypercars. We have unprecedented populations on both sides of the Atlantic. So that basically proves that concept works too. And if it was enablers, two different congregations or regulatory bodies or whatever, that was the way to enable the sports car renaissance, then it was a great success. If you ask, was it smart to do it with a set of rules from the start, the answer will be yes. Coratel told me but it worked.

It looks like IMSA's approach will win the day. “We see the next set of regulations as an evolution of LMDH, and there has to be a way for everyone to see the value of what happened with LMDH. And the OEMs did, Donnan said, ``Well, baby, I can run in the top tier in a cost-effective way.'' "Without being repetitive, stability is critical in many areas right now because when headwinds come that we don't control, my hope is that ... there's a place where automakers can come in, Michelin and Motul can come in," Doonan said.

One of the reasons some of us love prototype racing is that in many cases it has really improved our road cars. Direct transfer of technology from the race track to the road is less common than it used to be, but it still happens—for example, the Porsche Hybrid T engine and its electric turbocharger are derived directly from Porsche's 919 Hybrid race car.

In the future, software is more likely to be the place to watch. This is something that IMSA has accelerated, making the vast amount of data generated during its races available to researchers and developers to work with. "Now IMSA Labs has opened up this new opportunity to enter this space, to use the data that we generate to prove or build new software solutions, business solutions, artificial intelligence, predictive analytics. All of these things can happen here in real time, in a controlled environment, in a regulated environment," Doonan said.

OEMs have taught me that they have learned from the hybrid system in GTP cars, more so, the strategy of how to implement hybrid is immediately used in product development for road cars. Flat and this is what I have been told by OEM representatives. "In my opinion, we still need to allow things like this to be authentic and real in motorsport."

“It has to be a technology that is transferable to the road car business or to any OEM. "I think that's an important thing." "It's got to be something the fans like to see," Coratle said. But I will now give a silly example: do you develop your gas station or not. A fan in the stands doesn't really care. So it doesn't matter if everyone has a cheap pump in the car. These are things to avoid in the future. But all environmental issues should be touched upon. "We can't burn a lot of fuel with all these things," Koratle said.

Jonathan is the automotive editor at Ars Technica. He has a bachelor's degree and a doctorate in the field of pharmacology. In 2014, he decided to pursue his lifelong passion for cars by leaving the National Human Genome Research Institute to launch Ars Technica's automotive coverage. He lives in Washington DC.