The GT Daytona class Porsche 911 GT3 R has been given an increase in power, in the latest round of Balance of Performance adjustments ahead of next weekend’s Lone Star Le Mans at Circuit of The Americas.
IMSA confirmed Thursday the BoP tables for the penultimate round of the season, with the Porsche getting a 2mm increase in air restrictor to bring it up to 40mm x2.
The car has also been given a 1-liter increase in fuel capacity and 1mm larger refueling restrictor, likely to compensate for the increased fuel.
The changes come in the wake of the withdrawal of two of the three full-season Porsche GTD entries from last month’s race at Virginia International Raceway, over cited BoP concerns.
Park Place Motorsports is expected to return to action at COTA and will be joined by the No. 23 The Heart of Racing/AJR car, the only Porsche to have taken part in the full season to date.
IMSA has also made BoP changes to a number of other cars ahead of the Texas round.
In Prototype, the Ligier JS P2 has been given a 10kg weight break, with the DeltaWing DWC13 Elan getting an increase in turbo boost. The Mazda Prototype will have a 1mm larger refueling restrictor.
Both the GTE and GT3 variants of the Ferrari 488, meanwhile, will have additional power, thanks to a boost increase, at all levels, while also a 1-liter increase in fuel capacity for both models. The GTE car, however, gains 0.5mm in refueling restrictor, with the GT3 car down 0.5mm.
The BMW M6 GTLM has been given a 10kg weight break and 0.5mm increase in refueling restrictor, with the Ford GT at a 1mm reduction.
Changes in refueling restrictors have also been made in GTD, with BMW (+1mm), Dodge (-0.5mm) and Lamborghini (+1mm).