Enlarge / Nine GTP race cars from Acura, Cadillac, BMW, and Porsche took part in this year's 24-hour race at Daytona. (credit: Jonathan Gitlin)

BMW provided flights from DC to Orlando and back, plus four nights in a hotel, so we could attend the Rolex 24 at Daytona. Ars does not accept paid editorial content.

DAYTONA BEACH, FLA.—With just one race on the books, it's probably too soon to declare this the dawn of a new golden era in racing, but that thought was on many minds at last weekend's spectator-packed Rolex 24 at Daytona. The grueling 24-hour race is the season-opening event for the WeatherTech Sportscar Championship, and 2023 saw the introduction of a new class of hybrid prototype race cars called GTP (for Grand Touring Prototype).

The crowds were heavier than ever, buoyed by the debut of the new machines, which put on a good show. And the complicated new energy-based pit stop formula didn't appear to present anyone any trouble.

The same can't be said for the race itself. Twenty-four-hour racing is hard —I speak from some experience—and making it to the end should be, and is, a challenge. A 24-hour race as the first race of the year for all-new cars is even more difficult, despite the thousands of miles each car covered in testing over the past few months. As such, some feared we might be in for a repeat of 2003; that year saw a new prototype class introduced, the best of which finished 24 laps behind the winning car, a racing version of a Porsche 911.

Enlarge / The #6 Porsche Penske 963 and the #10 Konica Minolta Acura ARX-06 run on Daytona's banking during the 2023 Roar Before the 24. With so many miles of testing completed, the Porsches are probably the favorites, but 24 hours is a long time in racing, and a lot can happen. (credit: Jake Galstad/LAT Images)

BMW provided flights from DC to San Francisco and back, plus five nights in a hotel, so we could attend Monterey Car Week. While I was there, I spoke with people from Acura and Lamborghini. Ars does not accept paid editorial content.

This past weekend saw the successful conclusion of the International Motor Sports Association's "Roar Before the 24," the series' preseason test ahead of this coming weekend's Rolex 24, a 24-hour race held each January at Daytona International Speedway in Florida. This year, the preseason test was more important than most, as there's a new kind of race car, called the GTP, competing in the Rolex 24 in 2023.

The new hybrid prototype category has attracted more manufacturer interest than we've seen in many years, with brands like Acura and Porsche building new cars to compete and others, like Lamborghini, waiting in the wings to join next year. But the biggest question is whether these new race cars will be able to make it to the end of the race. As in the larger automotive industry, supply shortages mean that spare parts are scarce, so the consequences of a crash are calamitous.

But what makes GTP—originally called LMDh—so attractive to car makers? I asked David Salters, head of Honda Performance Development, which oversees the Japanese OEM's racing activities in North America.

Enlarge / Porsche knows the road to a Le Mans win involves tens of thousands of miles of testing. (credit: Jonathan Gitlin)

Porsche provided flights from DC to Daytona Beach and back, plus a night in a hotel so we could attend its private 963 test. Ars does not accept paid editorial content.

DAYTONA BEACH, FLA.—Car companies like to keep new models far from prying eyes during the development process. That goes doubly so when they’re going racing, like Porsche is with its new 963, which made our invitation to watch the car test on Friday, while still in development, a rare chance to watch expertise at work. Doubly so considering that Porsche's partner with the 963 is Penske Racing, an organization that has racked up more than 600 wins across a range of disciplines over the past 56 years.

The 963 has been built to win the 24 Hours of Le Mans and endurance races like it and will compete next year in IMSA's new GTP category as well as the FIA WEC's Hypercar class. Built to a rule set known as LMDh , it's more of a collaboration than the Porsche crest on the nose might lead you to expect. Multimatic in Canada provides the car's carbon-fiber spine, or chassis. Xtrac supplies the transmission, Williams Advanced Engineering provides the lithium-ion traction battery, and Bosch is responsible for the electric motor/generator unit, all three of which are tightly packaged together.

But Porsche has built the twin-turbocharged 4.6L V8, which traces its roots back to the mid-2000s RS Spyder race car, with a road-going derivative also found in the 918 Spyder hypercar. Power is capped at 680 hp (500 kW) for the internal combustion engine and hybrid system working together and is measured by sensors to ensure no one gets over-creative.