IMSA reduces power of DPIs

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All cars running under IMSA’s new DPi platform have been slowed in the latest round of Balance of Performance adjustments following last month’s season-opening Rolex 24 at Daytona.

The Cadillac DPi-V.R, which dominated the race, along with both the Mazda RT24-P and Nissan Onroak DPi, are facing power cuts ahead of next week’s IMSA-sanctioned test at Sebring International Raceway.

The V8-powered Cadillac has been given a hefty 1.5mm reduction in air restrictor, while both the Mazda and Nissans have lost turbo boost across all power ranges.

Cadillac has also faced a 7-liter reduction in fuel capacity, along with a smaller refueling restrictor, while changes have also been made to the refueling restrictors for the Nissan and most Gibson-powered LMP2 cars.

No changes have been made to the LMP2-spec cars, which remain as the performance baseline in the Prototype class.

P class cars, meanwhile, will debut new “Sprint" aero packages, compared to the Daytona-only aero utilized in the season-opener.

BoP changes have also been made in the production-based classes, with the BMW M6 GTLM getting a 10kg weight break but facing a reduction in turbo boost ratio.

Weight adjustments have been handed to the Acura NSX GT3 (-20kg), Ferrari 488 GT3 (+10kg) and Lexus RC F GT3 (+10 kg) in GT Daytona, along with air restrictor increases for the Lamborghini Huracan GT3 (+1.0mm) and Lexus (+2mm) and fuel capacity boosts for both models as well.

The GTD-spec Ferrari, meanwhile, will have a reduced boost ratio across all power levels, following its strong run at Daytona.

IMSA reserves to make additional BoP adjustments prior to next month’s Mobil 1 Twelve Hours of Sebring, based on data gathered at next week’s test, which is mandatory for all manufacturers and constructors. Sportscar365