IMSA's Doonan discusses BoP process ahead of Detroit GTP adjustments
IMSA President John Doonan took some time to speak with the media regarding a recent "manual adjustment" in the WeatherTech SportsCar Championship's GTP Balance of Performance, which will take effect at the upcoming Chevrolet Sports Car Classic in Detroit.
The adjustment amounts to significant horsepower increases and minimum weight decreases for the Acura ARX-06 and Cadillac V-Series.R, and the opposite adjustments for the BMW M Hybrid V8 and Porsche 963, which have had power reductions and weight increases for the Detroit street race. The Aston Martin Valkyrie has had no significant changes to its power, weight, or maximum stint energy.
The IMSA Technical Committee (ITC), in collaboration with the manufacturers, traditionally sets the parameters of horsepower, weight and maximum stint energy based on a five-race rolling average.
"The goal each and every time is to have a transparent process with our manufacturers to make sure that everybody understands that IMSA has a responsibility to have equal and fair competition, and also to take all of the factors that play into performance on-track, and make adjustments," Doonan said. "All of these changes are based on a data-driven process. I think in the end, we've had a rolling average process year-to-date, and we've realized that that rolling process hasn't reacted fast enough in equal and fair competition.
"You want to do the right thing and make adjustments that are based on a process. But also, when things are somewhat diverging in terms of competition, when you've got a couple of cars outside the performance band, and a couple of cars on the low side, you want to bring everybody together."
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