Global sportscar conversion followed, the LMDh formula (DPi’s successor) was adopted by both IMSA and the World Endurance Championship and suddenly there was an explosion of interest. LMDh cars are hybrids, rear-wheel-drive and affordable for both manufacturers and privateers to run. In its first season the class, renamed GTP in deference to IMSA’s greatest period, saw Porsche, Cadillac, BMW and Acura battling for victory around North America. Lamborghini will join the action for 2024.
Some of you are immediately shouting at me that the World Endurance Championship has more. And, you would be right. But more doesn’t necessarily mean better. While the WEC sets itself the difficult task of finding a competitive balance between two different rulesets (let’s not get into Hypercar vs Dh here) and tries to work with a greater range of OEMs, IMSA has been quietly getting the Balance of Performance between its four brands right.
So right that in 2023 all four IMSA GTP manufacturers won at least one race. Contrast that with the WEC where Toyota won every round except one. IMSA’s title came down to a final lap confrontation and yoyoed between teams the whole season. No racing series is perfect, but in its first season, GTP got pretty close. And that has attracted teams outside of the big OEMs. While there are four brands on the grid for the season-opening Rolex 24 at Daytona, the entry list features eight separate teams running at least one of those cars.
And that’s not the whole story for IMSA. Variety is everywhere. Not just between GTP cars, but through the field. IMSA has five classes, with LMP2, GTD Pro and GTD joining in. So if one lead battle seems to have quietened down, there’s always another going on somewhere. GTD cars are globally raced GT3 cars, so you can add Aston Martin, Lexus, McLaren, Corvette, Mercedes and Ferrari to the list of brands involved. There’s something to cheer for for everyone.