Why BoP for DTM's Spielberg opener was delayed

Mercedes could benefit from the conditions

Among the baseline classifications, the Mercedes-AMG GT3 retains its 36mm restrictor and favourable lambda value of 0.91, along with a relatively low weight of 1,325kg.

The new DTM tyre is expected to suit the car better, as it reaches operating temperature more quickly than its predecessor – an area where the Mercedes struggled at Spielberg last year. The relatively mild temperature forecast could also play in its favour.

The McLaren 720S GT3 Evo, which set the pace in testing with Ben Dorr, remains unchanged and effectively serves as the reference point. Meanwhile, the updated Porsche 911 GT3 R Evo retains its 41.5mm restrictor, matching the specification used by its predecessor.

| | | | Aston Martin | 1,330 kg | 1.37 – 1.98 bar | +0.0 to +0.2 bar | 53 / 53 / 50 mm | 6° | 0.91 | | Ferrari | 1,335 kg | 1.0 – 2.46 bar | +0.0 to +0.06 bar | 80 / 83 / 50 mm | 3° | 0.90 | | Ford | 1,320 kg | 2 × 35 mm | -15 kg / -1 mm | 84 / 92 / 40 mm | 8° | 0.88 | | Lamborghini | 1,335 kg | 1.2 – 1.7 bar | +0.0 to +0.12 bar | 65 / 70 / 50 mm (-15 / -15 / 0 mm) | 5° | 0.90 | | McLaren | 1,310 kg | 1.1 – 1.79 bar | — | 65 / 70 / 50 mm | 6° | 0.88 | | Mercedes | 1,325 kg | 2 × 36 mm | — | 81 / 87 / 40 mm | 6° | 0.91 | | Porsche | 1,310 kg | 2 × 41.5 mm | — | 101 / 120 / 50 mm | 7° | 0.89 | | BMW | 1,340 kg | 1.0 – 2.39 bar | -0.06 to +0.06 bar | 82.5 / 81.5 / 50 mm | 4° | 0.90 |

Adjustments aimed at boosting Lamborghini and BMW

Efforts to bring the Lamborghini Temerario GT3 up to speed are evident in the BoP adjustments. Compared to the test, the car has received up to 0.12bar more boost pressure at low revs, along with increases in the mid-to-high range. It is also permitted to run 0.15mm lower at both front and rear, improving aerodynamic performance in corners.

The BMW M4 GT3 Evo, now equipped with a production-derived turbo, sees an increase in boost pressure of up to 0.06bar in the mid-range, addressing issues encountered during testing where tyre graining contributed to a lack of pace.

Similar measures have been applied to other turbocharged cars. The Ferrari 296 GT3 receives a 0.03bar to 0.06bar increase across much of the rev range, while the Aston Martin Vantage GT3 gains a significant 0.2bar increase at low revs.

Special provisions for Ford Mustang

The Ford Mustang GT3 benefits from a special exemption regarding ground clearance. While regulations mandate a minimum of 50mm for cars homologated from 2022 onwards, the Mustang is allowed to run at 40mm, generating additional downforce without relying solely on engine performance.

At the same time, its restrictor has been reduced by 1mm to 35mm, compared to 38mm last year, balancing its straightline potential on a circuit where it is traditionally strong.

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