The 2025 season of the Rio Grande do Sul Endurance Championship promises great competition on the tracks. After a year of reestablishment, the championship now seeks to attract more competitors with several changes to the technical regulations, to better accommodate the various cars that are currently parked in the teams’ workshops.
1.The “return” of the P1 class
After years of absence, the P1 class returns to the Rio Grande do Sul grid. The P1 Gaudéria grid will be made up of the Sigma P2 G5 and AJR models in the P2 specification of Endurance Brasil. The use of movable wings is prohibited and the front and rear wings must have only one main element and one flap (one on each side in the case of the front wing). In addition, a series of cost-cutting measures were imposed, such as the mandatory use of fiberglass for most bodywork elements (only wings and diffuser/floor) may be made of carbon fiber.
We believe that other models such as the DTR01 could be entered in P1, both due to their configuration and the performance range they can achieve. In addition, another peculiarity was the addendum published to the regulations including a Lola B12/60 model transmission. Could this inclusion be linked to the elusive Lola Daytona Prototype that has been in Brazil since at least 2017 but has never appeared in official competitions?
Furthermore, the presence of the Sadev SL-9020 transmissions (model chosen for the Sigma P1 G5 Evo), EMCO GA46 (as far as we know used in the MC Tubarão X) and DMA 1098 GT (so far we don’t know of any applications for this box in Brazil – could there be a new project coming up)? In any case, the models that will eventually compete may undergo other performance changes, in order to maintain the level of competition according to the class’s target lap times:
2. The “New” P2 class
With the return of P1, a “P2 ½” class was also created for older prototypes such as the MCR, MRX and MR18, among other models of older design. We can expect models such as the ABS01, Predator, Scorpius and other classics to compete. The regulations are the same as for the non-homologated P1s, regarding weight and engine configuration, and GT3 cars with 36 mm restrictors and a minimum weight of 1300 kg will also be allowed.
3. P3 Class
The P3 class continues without any major changes, allowing the registration of prototypes with multi-valve naturally aspirated engines, motorcycle engines and Stock Car cars. Here, the MRX prototypes will mainly compete.
4. P4 Class
Like P3, P4 continues with stable regulations. Prototypes with 2-valve engines per cylinder are allowed, such as the Aldee Coupe, Spyder and MRX..
5. GT1 Class
In the GT1 class, the regulations remain stable, with participation permitted for GT3 cars manufactured up to 2012, touring cars with engines above 2.5 liters naturally aspirated and turbo, Trofeo Linea, Stock Car with restrictors and modern GT3 models subject to a specific BoP..
6. GT2 Class
Also in GT2 the regulations follow those of 2024, with the addition of the Vettore prototype that competed in P4 until 2024. In addition to it, touring cars up to 2.1 liters turbo, up to 2.5 liters aspirated and Audi DTCC can be registered except those that fit into the GT class of the Gaúcho de Superturismo.
7. GT Class
Finally, the GT class continues with the same regulations, allowing the registration of touring models up to 2.1 naturally aspirated with radial or semi-slick tires..
