IMSA will utilize a largely unchanged Balance of Performance from the Roar Before the Rolex 24 heading into next weekend’s WeatherTech SportsCar Championship season-opening Rolex 24 at Daytona.
The sanctioning body confirmed the Rolex 24 BoP table to competitors on Wednesday, which sees only minor tweaks to selected cars and no significant performance-related adjustments.
Fuel capacities have been reduced for three of the four DPi cars, with the Acura ARX-05 and Multimatic RT24-P each losing 2 liters and the Cadillac DPi-V.R reduced by 1 liter.
The Onroak Nissan DPi, meanwhile, has an adjusted Lamdba, while the Multimatic DPi has been mandated to run its high downforce rear wing package instead of “2019 Opt. 1” as outlined in the initial BoP.
It comes as the only performance-related adjustment to the Team Joest-entered cars, which topped the time charts in dominant fashion in the three-day pre-season test.
In GT Le Mans, the BMW M8 GTE gets a 2-liter fuel capacity increase, with an adjustment made to the Ferrari 488 GTE’s RPM redline.
The GT Daytona class sees the Lamborghini Huracan GT3 Evo get a 1 mm larger air restrictor, along with a related 2-liter increase in fuel capacity, with the BMW M6 GT3 receiving a 15 kg weight break, in what’s the biggest BoP change made to any car in this adjustment period.
Fuel capacities have also been adjusted for the new-for-2019 Porsche 911 GT3 R (+3 liters) and Acura NSX GT3 Evo (-3 liters).
IMSA has opted not to go ahead with a class-wide slowdown of GTD, as initially evaluated.