As discussed yesterday in previous technical analysis, it is widely believed within the Formula 1 paddock that Ferrari could be facing a certain performance deficit potentially linked to its exhaust solution operating with a variable blowing effect. This topic has naturally attracted attention not only from engineers within the Maranello headquarters, but also from rivals Mercedes and other competitors like Red Bull and McLaren, who constantly monitor each other’s aerodynamic and mechanical innovations throughout the development cycle of modern Formula 1 cars.
The 2026 Formula 1 regulations are extremely complex, with a much higher level of hybridisation and aerodynamic constraint compared to previous seasons, and for this reason every single small technical detail must be carefully analysed, simulated, validated, and then re-validated before being introduced into a competitive package. Today’s analysis aims to clarify the situation by starting from the technical fundamentals behind this particular solution known as FTM or flick tail mode, which represents one of the more sophisticated and controversial aerodynamic-mechanical integration concepts currently under evaluation in modern Formula 1 design philosophy.
The possible issues of the FTM exhaust on the SF-26
The rumours circulating in the paddock regarding a potential power loss associated with Ferrari’s FTM system certainly deserve a deeper and more structured technical examination, especially when considering the competitive context involving drivers Charles Leclerc and Lewis Hamilton, who both rely heavily on absolute consistency in power delivery and aerodynamic stability in order to extract maximum performance over a full race stint.
Although the initial estimate of a drop of around 14 to 15 horsepower may be considered somewhat overstated or at least dependent on operating conditions, the underlying engineering principle supporting this theory remains based on solid thermodynamic and fluid dynamic foundations. It also highlights, in a broader sense, the delicate compromises inherent in Formula 1 2026 design philosophy, where performance is increasingly a result of system-wide optimisation rather than isolated component superiority.
From a purely mechanical and thermodynamic standpoint, the dynamic at play is relatively clear and can be explained in a structured way. Reducing the pressure difference between the upstream and downstream sections of the turbine effectively leads to a physiological reduction in the enthalpy drop available to the turbine component itself. This is a fundamental concept in turbocharger efficiency, where any reduction in available energy conversion potential inevitably has downstream effects on the entire power unit behaviour.
This reduction in usable energy creates a chain reaction that can lead to the compressor operating at a slightly lower rotational speed than its optimal design window. As a consequence, a reduction in boost pressure naturally emerges within the intake system. In simple engineering terms, this is effectively the trade-off or “price” that must be paid for the adoption of such a system, especially one designed to optimise aerodynamic interaction at the rear of the car.
However, within a modern Formula 1 ecosystem, no solution is ever implemented without a full 360-degree analysis covering aerodynamics, thermodynamics, structural integration, and race simulation performance. Once Ferrari identified the opportunity offered by exploiting the available regulatory space within the technical rules, the team based in Maranello conducted an extensive development and simulation programme before committing to any final design direction.
The basic mistake to avoid when judging Ferrari’s variable blowing exhaust
Computational Fluid Dynamics simulation work clearly highlighted from the earliest development phases the potential risk of power loss, immediately triggering a classic engineering debate between aerodynamic gain and mechanical compromise. This is a fundamental conflict that every Formula 1 engineer must manage continuously during the design process, including senior technical figures like those working under Ferrari technical leadership and aerodynamic direction of Chassis Technical Director Loïc Serra.
Modern Formula 1 teams operate as strictly data-driven organisations where intuition alone is never sufficient. Every idea, no matter how promising it may appear in conceptual design or wind tunnel observation, must be translated into measurable lap time performance across a full race weekend simulation model.
Ferrari in Maranello has access to extremely advanced simulation software, correlation tools, and driver-in-the-loop simulators capable of quantifying the real lap time benefit or disadvantage of every single aerodynamic or mechanical component over the course of an entire Formula 1 championship season. In this context, even if the exhaust system may introduce a measurable power deficit under certain conditions, the overall lap time balance must still remain positive when all aerodynamic gains are taken into account.
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For this reason, it is considered relatively unlikely that this specific engineering compromise within Ferrari’s technical data is the root cause of any significant internal combustion engine performance deficit compared to Mercedes power units, as observed during the opening races of the season. Charles Leclerc and Lewis Hamilton would immediately feel such a deficit in acceleration zones, yet the data suggests a more complex interaction of factors rather than a single dominant weakness.
Such a scenario would represent a major engineering miscalculation, one that Ferrari’s simulation tools and validation processes would normally be expected to detect and prevent well in advance of on-track deployment, given the extensive computational resources and telemetry data available during development.
The paradox of the variable blowing exhaust on drag resistance
Beyond the pure power unit aspect, this particular exhaust configuration hides a second and equally important aerodynamic characteristic that deserves deeper analysis. This relates to the interaction between exhaust flow and rear aerodynamic surfaces, which under the supervision of Ferrari’s technical group led by Loïc Serra, requires extremely precise and millimetre-level aerodynamic balancing.
The interaction between high-energy exhaust gases and aerodynamic appendages generates a localised aerodynamic force that is directly proportional to the velocity and energy of the expelled fluid flow. This means that any variation in engine speed, throttle application, or energy deployment strategy will directly influence the aerodynamic behaviour of the rear of the car.
Since this parameter naturally fluctuates depending on engine operating regimes, energy recovery deployment, and race conditions, the vertical aerodynamic load produced by the FTM system is inherently variable in nature. This variability is not necessarily negative in itself, but it introduces a level of unpredictability that must be carefully managed through setup and simulation work.
Here lies the true engineering paradox of the entire concept: during phases of maximum acceleration on long straights, precisely when Formula 1 cars require the most efficient aerodynamic penetration and minimal resistance, the system is simultaneously operating at its highest energy output and therefore generating peak aerodynamic load.
This situation inevitably translates into maximum aerodynamic drag occurring at the exact moment when drag is most detrimental to overall performance, particularly in terms of top speed and straight-line efficiency. This is a known and documented characteristic within Ferrari’s ongoing development programme, and it has already been analysed in correlation with race simulation data.
For this reason, at least in part, the update package prepared for the Miami Grand Prix is expected to mitigate this behaviour, potentially through refined aerodynamic surfaces and a revised rear wing concept, internally referred to as the “Macarena” wing, both in terms of geometric shape and activation or deformation behaviour under load conditions.
Returning to the FTM concept itself, it remains one of the most complex technical puzzles currently present in modern Formula 1 development. It is a highly sophisticated solution that Ferrari’s engineers have had to model, simulate, integrate, and effectively neutralise in terms of unwanted side effects from the earliest stages of the SF-26 car development programme.
What remains to be seen is whether the current estimated aerodynamic and mechanical balance will continue to improve throughout the remainder of the 2026 Formula 1 world championship season, in order to further minimise existing limitations while simultaneously optimising the inherent advantages that the system is designed to provide under specific operating conditions and race scenarios.
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