IMSA has revealed a significant surprise with its Balance of Performance adjustments for the WeatherTech SportsCar Championship field ahead of next week’s Rolex 24 At Daytona. In DPi, LMP2, and GT Le Mans, no meaningful changes have been made.
Barring minor fuel capacity alterations to align stint lengths for the DPi Acuras, Cadillacs, Mazdas, and the lone Nissan, IMSA chose to leave horsepower output, minimum weight, and the rest of its BoP manipulation options alone following the January 4-6 Roar Before The 24 test at Daytona.
The lack of change to the DPi class suggests IMSA felt slowing down the Roar-leading Mazdas, or elevating the pace of the other brands was not required based on testing data it captured throughout the event. The same is true for GTLM.
GT Daytona is the only category where BoP changes, other than fuel capacity, were made to multiple models.
On the topic of adding or removing performance for the sake adjusting the lap time gaps among the classes, DPi, LMP2, GTLM, and GT Daytona have been left untouched.
DPi BoP Changes
Acura ARX-05: Reduction of fuel capacity by of two liters, now 76L.
Cadillac DPi-V.R: Reduction of fuel capacity by one liter, now 70L.
Mazda RT24-P: Reduction of fuel capacity by two liters, now 79L. Clarification on rear wing angle allowance for the race that is no different from what was used at the Roar.
Nissan Onroak DPi: No changes.
GTLM BoP Changes
BMW M8 GTE: Increase of fuel capacity by two liters, now 90L.
GTD BoP Changes
Acura NSX GT3: Reduction of fuel capacity by three liters, now 105L.
BMW M6 GT3: Reduction of weight by 15 kilos, now 1290KG.
Lamborghini Huracan GT3: Increase in air restrictor flow to engine by one millimeter, now 39.0mm. Increase of fuel capacity by two liters, now 97L.
Porsche 911 GT3 R: Increase of fuel capacity by three liters, now 93L.