Ferrari struggles with balance at Suzuka: Friday marked by instability and hybrid management. Friday practice at Suzuka revealed Ferrari SF-26 struggles with rear stability.

The Friday practice sessions at Suzuka offered clear technical insights into Scuderia Ferrari’s current state. Analyzing data from both sessions reveals a car that has yet to find a stable operating window, especially in the most sensitive moments of cornering. Here’s a detailed breakdown.

Telemetry comparison: Leclerc vs Piastri

A comparison of telemetry between Charles Leclerc, Ferrari’s internal benchmark, and Oscar Piastri, who set the fastest time in FP2, highlights the car’s critical weaknesses. The gap is not simply a linear performance deficit but a combination of factors affecting both the car’s dynamic behavior and the deployment of the hybrid power unit across the lap.

Downforce without confidence

One of the most striking findings is that the SF-26 is not lacking downforce—in fact, Leclerc maintains competitive minimum speeds through several corners, indicating the car has significant aerodynamic load. However, this load does not translate into driver confidence.

Examining speed graphs alongside throttle input reveals a car that requires constant modulation of the accelerator. Leclerc must employ a specific technique, working harder than necessary to keep the car on line, with frequent corrections disrupting the fluidity of the lap. This issue is most pronounced in the opening sector—the Suzuka esses—where rear stability is crucial to building a fast lap.

The critical moment lies in the transition from mid-corner to exit, when downforce shifts rearward and the driver reapplies throttle. In this phase, the SF-26 tends to lose rear grip, forcing micro-corrections that directly impact lap time.

This dynamic aligns with Lewis Hamilton’s radio feedback, highlighting that the lack of confidence prevents him from pushing fully. Telemetry confirms that it’s not outright speed that’s missing, but the ability to use it consistently.

In contrast, Piastri’s McLaren delivers a much cleaner line, with smoother and more progressive throttle application, reflecting a more stable aerodynamic platform that guides the driver through the corner without constant correction.

Technical analysis: the hidden limit of the power unit

While the first level of analysis concerns car balance, the second equally critical factor is hybrid energy management. Time delta graphs show Ferrari’s losses are not uniform around the lap but concentrated in specific sectors, particularly between Turns 11 and 12.

Here, the so-called “super-clipping” effect becomes evident. The SF-26 must limit electric power output to preserve energy for later sections, causing a noticeable drop in acceleration precisely when consistent power is most needed. Mercedes-powered cars, including the works teams and the McLaren MCL40, show a smoother energy deployment, allowing continuous acceleration without interruptions.

Piastri builds his advantage in these conditions: cleaner exits, continuous throttle application, and no interruptions in power delivery. Ferrari, on the other hand, demonstrates less uniform power deployment, with an acceleration curve showing clear discontinuities.

This also ties into the car’s dynamic behavior. An unstable rear forces the driver to modulate the throttle constantly, and combined with suboptimal energy management, it results in cumulative losses that significantly affect lap times.

Finding a stable window before qualifying

Overall, Friday in Japan revealed a car with potential but still far from optimal configuration. The SF-26 possesses downforce and can express it in some phases, yet it lacks the consistency to translate that potential into performance.

Technically, the problem seems manageable. Adjusting balance, particularly rear stability during transitions between throttle lift and reapplication, could restore driver confidence and improve cornering quality. At the same time, refining hybrid energy deployment to reduce clipping in the most penalizing sections is essential. A smoother distribution of electric power could help Ferrari reduce gaps to top references.

Suzuka naturally amplifies imperfections. High-speed corners and technical sequences test both aerodynamic balance and engine management. In this context, the SF-26 displayed weaknesses but also provided guidance on where improvements are needed.

The feeling is that there is a concrete margin for improvement. However, precise and focused work will be required to bring the car closer to its ideal window. Only then can Ferrari approach qualifying with realistic ambitions and, above all, a car that allows the drivers to push to the limit without reservation.