Cars from three of the four DPi manufacturers have been slowed ahead of next weekend’s Mobil 1 Twelve Hours of Sebring, in IMSA’s latest Balance of Performance adjustments ahead of the second round of the WeatherTech SportsCar Championship season.
Both the Acura ARX-05 and Nissan Onroak DPi face power reductions, while the Rolex 24 at Daytona-winning Cadillac DPi has been given a 10kg weight increase.
The adjustment for the Cadillac DPi brings it up to a minimum weight of 950kg, ten more than any other Prototype class competitor.
The pair of Acura Team Penske entries, meanwhile, face a turbo boost decrease across all power levels as well as a 1-liter fuel capacity reduction, with the Nissan DPi getting power reductions between 6000-7600 rpm.
Mazda’s RT24-P is the only beneficiary from the BoP changes, with the Multimatic-built prototype receiving a 2-liter increase in fuel and aero adjustments to its rear wing.
BMW Given Additional Breaks in GTLM
Following its turbo boost increase post-Daytona, the BMW M8 GTE has been given further concessions for Sebring, with the car getting a 20 kg weight break and additional power boost at the 5000-7500 RPM levels.
The BMW, along with Porsche’s 911 RSRs, will also have a 2-liter increase in fuel capacity.
GT Daytona sees changes primarily to the Mercedes-AMG GT3 and Lexus RC F GT3, which both gain a 1mm larger air restrictor, but offset by a 20kg weight increase for the Mercedes.
IMSA has also confirmed the minimum full tank refueling times for Prototype (30 seconds), GTLM (34 seconds) and GTD (40 seconds) as previously announced last week.