IMSA has released the Balance of Performance adjustments for GTP for the 12 Hours of Sebring, which takes place next weekend.
Things have a different look compared to the BoP settings that were set at the season-opening Daytona 24 hour race, as teams have started to understand the new cars.
When the series last raced in Daytona, IMSA set each GTP car at the same BoP values across the board for every category, except max engine RPM. Acura had the highest revving engine at the Rolex with an RPM of 9512.
The Acuras were almost a full 1000 RPM above the next highest revving engine in Daytona, the Cadillacs at 8800.
Going into Sebring, the Acuras will have the heaviest car on the grid with a 1054 kg minimum weight set for the defending Manufacturers’ Champions. They also have the most energy to use each stint with 917.0 MJ at their disposal and a replenishment rate of 22.93 MJ/sec.
The Acura machines also have the most power to use, with a max of 444 kW coursing through the hybrid system.
The Rolex 24 was a day to forget for the hotly anticipated Porsche GTP outfit, making its return to top-class sportscar racing in 2023. Both Porsche cars were in and out of the garage all race and despite the rigorous testing regiment the team embarked on pre-season, were one of the most unreliable marques in the GTP field.
The German manufacturer goes into Sebring with the second-heaviest car, running a minimum weight of 1048 kg. The ICE part of the hybrid system will run at 8158 RPM, the second lowest in the field, only higher than the BMW machines. The team can not exceed 917 MJ of energy during a stint and will replenish at a rate of 22.80 MJ/sec.
The other two machines are running identical BoP values except for their RPM rate and minimum weight. The BMW engines will run at 8000 RPM, the lowest on the grid, and will weigh 1040 kg. The Cadillac GTP machines will run 8800 RPM with a minimum weight of 1038 kg, the lowest on the grid.
Both the BMW and Cadillac machines will be capped at 905 MJ per stint with a replenishment rate of 22.63, the lowest on the grid in both categories. The electric side of the hybrid system will only produce a maxim of 438 kW at speed, once again tied for the lowest on the grid.
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