How Do F1 Teams Deliver Upgrades?

• Every F1 upgrade splits into two streams: aerodynamic development (the surfaces visible from outside the car) and chassis development (suspension, steering, brakes and other underlying parts), both tested in simulation and the wind tunnel before they reach the track.
• Since 2021, wind tunnel and CFD time has been rationed by a sliding scale tied to championship position, so the constructors’ leader gets access to less testing time than the team at the back.
• The 2026 rules reset changed what teams develop: less downforce, more drag efficiency, active aerodynamics and a $215 million cost cap all now shape which upgrades make it to the car.

Developing a Formula 1 car never really stops. Every upgrade, whether it is a new front wing or a redesigned brake duct, starts as an idea, gets tested in simulation and the wind tunnel, then has to prove itself on track before the team commits more of its limited budget and aero testing time to the next one. The process splits into two parallel streams: aerodynamic development, which covers the surfaces visible from outside the car, and chassis development, which covers the underlying parts such as suspension, steering and brakes. Alongside the car’s general development rate, teams also chase event-specific packages, such as a low-downforce rear wing for a low-drag circuit like Spa-Francorchamps.

Aerodynamic and Chassis Development

Aerodynamic development starts with identifying where the airflow around the car can be improved. Engineers come up with different ways to target those areas within the regulations, run computational fluid dynamics (CFD) simulations to see whether they can manipulate the flow field as intended, then take promising ideas into the wind tunnel to confirm the gain shows up in physical testing.

Chassis development runs alongside this, refining the parts of the car that do not depend on external airflow: suspension geometry, steering systems and brakes. Manufacturing a new aerodynamic part is a genuine team effort, starting with the aero department releasing a surface, which then passes through design, pattern-making, mould-making and composite lamination, with structural testing at each stage to confirm the part is strong enough before it is cleared to run.

Development direction is not fixed. Feedback from how the car behaves on track regularly changes what the team prioritises next, and the data collected is always specific to the question being asked, whether that is “is this new lightweight part strong enough” or “does this upgrade actually make the car faster.” Driver feedback plays a central role in answering the second question.

Why 2026 Changed What Teams Develop

The 2026 technical regulations were the sport’s biggest reset in a generation, and they changed the target aerodynamicists are chasing. Cars are around 30kg lighter, with a minimum weight of 768kg, and produce roughly 30 percent less downforce and 55 percent less drag than the 2022-2025 generation. Because the drag reduction is larger than the downforce cut, the emphasis has shifted toward aerodynamic efficiency: getting the same cornering load for less drag on the straights, rather than simply piling on downforce.

Active aerodynamics is the clearest sign of that shift. Cars now run movable front and rear wing elements with two modes, a high-downforce setting for corners and a low-drag setting for straights, rather than the fixed wing profiles teams developed under the old rules. That system was part of the sport’s broader 2026 regulation reset, designed to close up flat-out speeds and improve overtaking without simply making the cars slower everywhere, and it gave aero departments an entirely new variable to develop around: not just how much downforce a surface generates, but how well it switches between two very different jobs on the same lap.

With aerodynamic loads lower across the board, chassis development has taken on more relative importance too. Mechanical grip through the suspension and tyres now makes up a larger share of a car’s overall grip than it did under the previous, more downforce-dominant regulations, so upgrades to dampers, geometry and setup tools are getting more attention from teams than they were a few years ago.

Infrastructure is part of this story as well. Aston Martin brought its new Silverstone campus and wind tunnel online through 2025 and 2026 as part of its preparation for the new rules. “The wind tunnel is all coming online and the new simulator, there is just space for everybody to have their own environment,” said Tom McCullough, Aston Martin’s Performance Director. “We’re heavily involved with the gearbox, the hydraulics, everything that we need to be involved with for 2026.”

Wind Tunnel and CFD Time Are Rationed

Teams cannot simply throw unlimited testing at an upgrade. Since 2021, F1’s Aerodynamic Testing Restrictions have tied each team’s wind tunnel runs and CFD hours to its championship position on a sliding scale, recalculated twice a season. Under the current FIA regulations, the coefficient runs from 70 percent of the baseline allocation for the championship leader up to 115 percent for the team in tenth or a new entrant, in even five percent steps for the positions in between. That means the most competitive team on the grid gets meaningfully less wind tunnel and CFD time than the one struggling at the back, a deliberate handicap intended to help the field close up over a few seasons rather than one.

That scarcity is exactly why simulation tools carry so much weight in the process. In a $215 million-a-year cost cap era, where wind tunnel and CFD running costs count against the same capped budget as salaries and manufacturing, teams plan upgrades well ahead of their build or delivery window rather than testing speculatively. They work from component-level simulation up to full lap simulations, using wind tunnel data to feed those models and predict which corners on a given circuit will show the biggest gain before a part is ever built.

The Driver-in-the-Loop Simulator

The driver-in-the-loop simulator sits between the real world and pure simulation. It lets a team’s race drivers experience a virtual version of an upgrade before it exists as a physical part, in a safe, repeatable environment. The simulator is also used to gather feedback from the drivers, who pinpoint specific moments around a lap and relay that detail back to the engineers, feedback that is often crucial in judging whether a new upgrade is performing as intended before it is committed to a race weekend.

From Factory to Track: Manufacturing and Planning

Manufacturing an aerodynamic component is a genuinely collaborative process, moving from the aero department’s released surface through design, pattern, mould and composite lamination, followed by pre-fit checks and non-destructive testing to confirm structural integrity. Planning for a new car typically starts around a year ahead of the build window and shakedown, while smaller performance upgrades are usually planned a couple of months ahead of their delivery date.

Teams still have to stay reactive. Smaller parts are relatively easy to fit trackside and can be analysed in near real time, but larger aerodynamic upgrades are harder to validate within a single race weekend, so teams lean on data gathered across multiple races to confirm an upgrade is doing what it was designed to do.

Validating an Upgrade on Track

Once a new part reaches the circuit, the team checks it against the previous component’s performance, looks for characteristic changes such as improvements through specific corners or phases of a corner, and compares the on-track result to what the wind tunnel and CFD models predicted. That wind tunnel data also feeds back into the simulation tools, helping the team see which corners on a given circuit should show the largest gain, information that then feeds into how the car is set up for qualifying and the race.

Driver feedback closes the loop. Drivers are particularly good at pinpointing specific moments around a lap where a car’s behaviour has changed, and relaying that detail in the debrief. If what the drivers describe on track matches what the team expected in terms of car balance, that is a strong sign the upgrade is delivering as intended, alongside whatever the telemetry and sensor data already show.

Want more F1Chronicle.com coverage? Add us as a preferred source on Google to your favourites list for the best F1 news and analysis on the internet.

Source:

• FIA 2026 F1 Regulations, Section F: Operational Regulations (PDF)

Article reviewed and updated by Jack Renn, August 2026.

More F1 Reading

• Did Lewis Hamilton Drive For McLaren?
• What Is Anti-Stall On An F1 Car?
• Formula 1 Circuit Maps | F1 Tracks
• Are Formula 1 Drivers Athletes?