Grello gets a brother: What’s behind the new "Greeno" Porsche

– The “Grello” Porsche from Manthey Racing has long been a cult favorite at the Nürburgring; now the racing team from Meuspath, in cooperation with the Griesemann Group, is bringing a little brother to the start: a specially developed Porsche 911 GT3 Cup Manthey in the striking “Greeno” design.

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The new race car is based on a 911 GT3 Cup of the 992.1 generation and relies on an extensive conversion package, including recycled CFRP. The eFuel-powered 911 GT3 Cup Manthey will compete in the 24h Nürburgring with the starting number 992.

Björn Griesemann, Georg Griesemann, Dirk Adorf and Marco Holzer share the steering wheel of the poison-green Manthey Porsche. In preparation for this year’s endurance classic, the quartet will also participate in the third round of the Nürburgring Endurance Series (NLS) as well as the 24h Nürburgring Qualifiers.

The new project follows the Toyota GR Supra GT4 and Porsche 718 Cayman GT4 RS Clubsport M, with which the Griesemann brothers have already been active in the Green Hell in recent years, regularly causing a stir with top results.

Manthey further develops the Cup Porsche

The new 911 GT3 Cup Manthey is characterized by an extensive aerodynamics and radiator concept and once again focuses on sustainability. For example, the newly developed front including fenders and hood, as well as the new rear fairing, the wheel arch extensions, the rear wing, and the rear lid are made of recycled CFRP.

In addition, an existing chassis serves as the vehicle base to save resources. For improved performance on the long distance, a central radiator is installed according to a proven concept, which also optimizes the aerodynamics at the front.

This design also reduces the risk of the radiator being damaged and coolant leaking in the event of external contact. Additionally improved brake cooling reduces wear and ensures a longer service life.

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Further aerodynamic improvements include a front fairing with integrated underbody, flics, and a newly designed rear wing with enlarged endplates and adapted wing connection. Due to the new rear wing connection, the 911 GT3 Cup Manthey relies on a flow-optimized intake from the 991.2 GT3 CUP MR.

Wheel arch extensions at the front and rear also create space for a track widening of 20 millimeters at the front and 50 millimeters at the rear axle, as well as for a lightweight wheel set with a weight saving of almost four kilograms.

Manthey Porsche runs on synthetic fuel

For use on the long distance, a closed tank system is installed in the 911 GT3 Cup Manthey, which allows refueling through the front hood. Speaking of fuel: The “Greeno” will complete the 24h race and the preceding races entirely with the synthetic gasoline eFuel Race 98.

This is produced as part of the DeCarTrans project, a research project at the TU Bergakademie Freiberg, funded by the Federal Ministry of Transport. The eFuel produced in this way is based on eMethanol, which is obtained from green hydrogen, and can be used in existing internal combustion engines without technical adjustments.

Due to its operation with climate-friendly eFuel, the vehicle will bear the “AT” label for alternative fuels. “We have proven several times that eFuels also work under extreme racing conditions, improved from year to year, and always set new goals,” recalls Georg Griesemann.

“The basis of running on eFuel has deliberately remained unchanged. That is exactly what we continue to focus on together with Manthey. There you can feel the understanding of vehicles and motorsport that has grown over three decades – combined with the ability to optimize components, rethink them, and consistently incorporate sustainability.”

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