IMSA has made Balance of Performance adjustments to the GT Le Mans and GT Daytona classes ahead of this weekend’s Mobil 1 Sportscar Grand Prix at Canadian Tire Motorsport Park.
In an unprecedented move, the sanctioning body has issued BoP changes past its seven-day pre-event deadline given to teams, in the wake of “extraordinary circumstances” based on last weekend’s Sahlen’s Six Hours of The Glen.
The biggest change has come with the Ford GTs, which have been given a 15kg weight increase and boost reduction, following a dominant 1-2 finish at The Glen.
Both the Porsche 911 RSR and Corvette C7.R, meanwhile, have been handed 10kg weight breaks, with the Corvette also getting a 0.4mm larger air restrictor and revised declared minimum lambda.
Fuel capacities in GTLM have also been adjusted, with the Corvette getting two additional liters, a one-liter increase for the Ferrari 488 GTE and two-liter reduction for the Ford.
In GTD, both the Audi R8 LMS and Ferrari 488 GT3 have been given 15kg weight increases, with the Porsche 911 GT3 R getting 10kg of additional weight.
Due to an “atypical shortage of days” between Watkins Glen and CTMP, IMSA had exercised Article 2.2.2 in the WeatherTech SportsCar Championship Sporting Regulations, which has allowed them to make these BoP adjustments due to unforeseen or otherwise extraordinary circumstances.