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Michelin Pilot Challenge

Additional BoP Changes to Mustang GT4 for Road America

Ford Mustang GT4 given revised weight, power in latest round of Balance of Performance adjustments…

Photo: Jake Galstad/IMSA

The Ford Mustang GT4 has been hit with further Balance of Performance adjustments ahead of this weekend’s Continental Tire SportsCar Challenge race at Road America.

The Multimatic-built car will head into the seventh round of the season with an additional 20kgs of ballast, although regaining the 61mm air restrictor the car had prior to a BoP change for Lime Rock.

It will now run at a minimum weight of 1545kg, some 30kg heavier than the specification it had earlier this year.

A 1.5-liter fuel capacity increase has also been given to the Fords, to offset the increased power.

BoP adjustments have also been made to the Aston Martin Vantage GT4 and McLaren 570S GT4, which lose 15kg and 20kg, respectively, along with refueling restrictor adjustments to nearly all GT4-spec machinery.

The Blue Oval enjoyed a dominant start to the season in GS, winning four of the five opening rounds between the KohR Motorsports and Multimatic Motorsports entries, prior to the BoP change for Lime Rock.

Kyle Marcelli and Nate Stacy still remain atop the drivers’ championship, despite a ninth place finish in the most recent round.

Increased GS Class Field for Road America

A total of 36 cars are entered for Saturday’s two-hour race, including a boost to the GS class field.

Automatic Racing has entered all three of its Aston Martins, with the No. 38 BGB Motorsports Porsche Cayman GT4 Clubsport MR also returning, along with the No. 69 Motorsport In Action McLaren GT4, which also missed Lime Rock.

Stephen Cameron Racing has entered its BMW M4 GT4, bringing the class entry up to 25 cars.

Ford Performance NASCAR driver Ty Majeski, meanwhile, is set for his third start of the season in the No. 15 Multimatic Mustang GT4 alongside Scott Maxwell.

While enjoying a season-high ten entries in the last round, TCR drops to six, in what will be an all-Audi RS 3 LMS grid, with five cars set to do battle for ST class honors.

Track action gets underway on Friday.

John Dagys is the founder and Editor-in-Chief of Sportscar365. Dagys spent eight years as a motorsports correspondent for and SPEED Channel and has contributed to numerous other motorsports publications worldwide. Contact John


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