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“Party mode” was the paddock nickname for the engine maps teams could unleash for a single qualifying lap. This chart measures the effect structurally: it differences each constructor’s qualifying structural pace against their race structural pace, both estimated from the same fixed-effects panel model. A team that extracts far more over one lap than they sustain across a stint shows a negative delta they run a party-mode profile.

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What it shows

Each constructor is placed on a single delta:
  • Negative delta (party mode): the team extracts more pace over a single lap than they sustain across a race stint a qualifying-biased car or engine map.
  • Positive delta (race spec): the car comes into its own over race distance; the team may lose time in qualifying but manage tyres or fuel better than their grid slot suggests.
  • Balanced: teams within ±0.15s of zero are even across the two sessions.
Both pace estimates come from the fixed-effects panel that isolates the constructor’s car contribution after controlling for driver, tyre, fuel, and conditions so the delta is a property of the car, not of who drove it.
The effect was most pronounced in the turbo-hybrid era, when manufacturers could publish separate qualifying and race engine maps. It persists today as an aerodynamic signature: a high-downforce qualifying setup versus lower-drag race trim.

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How to use it

  1. Select a season to see that year’s constructor deltas.
  2. Sort by delta to rank the field from most qualifying-biased to most race-biased.
  3. Read the ±0.15s balanced band teams inside it have no meaningful session bias.
  4. Pair with grid-vs-finish results to see how often a party-mode car’s qualifying advantage survived the race.

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Reading the signal correctly

The delta is a difference of two model estimates, so it inherits both estimates’ uncertainty a team with few clean teammate-pair observations in either session has a noisier delta. A negative delta is a bias, not a flaw: a strong qualifier still scores from the front.
Qualifying and race pace are estimated on different lap populations (single-lap Q runs versus race stints). A team that barely runs in a given session a rain-shortened qualifying, for instance can show a misleading delta for that round.

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Data source

The chart queries the constructor structural-pace panel for both sessions via DuckDB-Wasm in the browser: int_constructor_structural_pace (race) and int_constructor_structural_pace_qualifying (qualifying). The data window covers 2018–2024. For the full model definitions, see the int_constructor_structural_pace reference and the int_constructor_structural_pace_qualifying reference.