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Cadillac Gets First Stage Power Increase for Rolex 24

IMSA issues updated Balance of Performance tables for this weekend’s Rolex 24…

Photo: Jake Galstad/IMSA

The Cadillac V-Series.R has been given a significant power increase at the first level of the new-for-2025 two-stage Balance of Performance for this weekend’s Rolex 24 at Daytona, as part of a series of BoP adjustments for the IMSA WeatherTech SportsCar Championship season opener.

Issued in a technical bulletin by IMSA on Wednesday, the Cadillac receives a hefty 20 kW (27 horsepower) increase at speeds below 230 km/h, although have had its top-end power reigned in by a reduction of 5.9 percent at speeds over 240 km/h.

Second-stage adjustments have been made to all GTP manufacturers, with the Acura ARX-06 having the second-largest reduction at 2.1 percent, although it receives a 2 kW (2.6 hp) increase at Stage 1.

The ORECA-chassied Acura has also received a sizable 12 kg reduction in minimum weight.

While the Porsche 963 gets 1 kg of weight added, it receives a 0.4 percent increase in second-stage power output, compared to a 0.1 percent increase for the BMW M Hybrid V8, which paced last weekend’s Roar Before the Rolex 24.

The Lamborghini SC63 is the only other GTP car to get additional power in the top-end, with a 0.2 percent increase compared to the configuration the car ran at the Roar.

Maximum stint energies and stint replenishment rates, meanwhile, have been changed for all but the BMW.

In the GT classes, which run torque sensors for the first time, only four of the nine car models have undergone changes.

The Ferrari 296 GT3 gets a 25 kg weight break, although countered by a 3.4 percent power reduction at the first stage and 4.6 percentage cut at Stage 2.

Lexus’ RC F GT3 gets a slight power increase across both stages, with a 1.2 percent increase at speeds below 190 km/h and 1.1 percent boost at speeds over 200 km/h.

The Porsche 911 GT3 R get a 20 kg increase in weight, and a 2.6 percent reduction in power at the first stage, with no changes in the second stage.

Additionally, the Ford Mustang GT3’s pit fuel tank height has been adjusted, while section 9.8.2 of the technical regulations, relating to the refueling restrictor, does not apply to the Blue Oval this weekend.

Maximum stint energies for the entire GT classes, meanwhile, have been adjusted since the Roar as well.

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

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