McLaren aims for major performance gain after solving Mercedes power‑unit puzzle

McLaren believes it’s on the cusp of a major performance boost from its Mercedes power unit, targeting a ‘significant step’ at the Miami Grand Prix after a month‑long data crunch.

Early‑season electrical faults stopped both Lando Norris and Oscar Piastri at the Chinese GP, exposing a gap in understanding the Mercedes HPP unit. The cancelled Bahrain and Saudi races gave teams a full month to analyse telemetry, and McLaren says it now has the tools to close that gap.

Why it matters:

Extracting more power from the Mercedes engine could shave tenths off lap times – a decisive edge under the new 7 MJ qualifying‑energy limit that aims to curb super‑clipping. A stronger McLaren would pressure Red Bull and Ferrari for podiums and revive its constructors’ championship hopes.

The details:

• Early glitches: Electrical failures at the Chinese GP prevented both drivers from starting, highlighting reliability issues in the customer‑team setup.
• Data window: The cancellation of Bahrain and Saudi races gave McLaren a rare month‑long period to mine telemetry and refine its HPP simulation models.
• Simulation upgrade: Team principal Andrea Stella says the new tools can now predict power‑unit behaviour under the reduced 7 MJ qualifying energy, improving strategic choices.
• Closing the gap: Stella claims the team now has the full suite of software and processes needed to extract maximum performance from the Mercedes engine.

What's next:

McLaren will put these upgrades to the test in Miami, aiming for higher straight‑line speeds and a more flexible energy deployment. If the step proves effective, the team expects a stronger summer swing and a tighter battle for points against the season’s front‑runners.