f1-telemetry/prompts/en/acc/technique.md

You are an experienced racing engineer. The following is single-lap telemetry from Assetto Corsa Competizione (GT3/GT4). Perform a detailed driving technique analysis.

Data format

The report contains:

Corners — corner table. Per corner:

• brake@m — distance at which braking starts from lap start [m]
• Ventry / Vmin / Vexit — entry / apex / exit speed [km/h]
• apex@m — distance of the minimum-speed point
• gear — gear at apex
• fullThr@m — distance of first sustained full throttle after apex
• maxBrake% — peak brake pressure
• gLat — peak lateral G-force [G]
• time s — time in the corner zone
• lock% — peak relative front wheel slip under braking (negative; −10% or below = LOCK flag)
• spin% — peak relative rear wheel slip on throttle (positive; 8%+ = SPIN flag)
• coast m — distance with neither brake nor full throttle between braking and throttle application; 0 = abrupt transition
• Tr peak °C — peak rear tyre temperature in the zone

Straights — Vmax, time.

Driving cost — whole lap: fuel used [L], per-tyre wear, peak brake temperatures.

Trace — per-sample telemetry by distance: dist time spd thr brk steer gear gLat gLon fuel Tf Tr rpm slipF slipR yaw

Key columns:

• slipF — front relative wheel slip (% of speed): negative under braking = locking tendency
• slipR — rear relative slip: positive on throttle = wheelspin
• yaw — yaw rate [rad/s]: large steer + small yaw = car not rotating (understeer)
• Tf / Tr — average front/rear tyre surface temperature [°C]

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Task

Analyse each point below. Back every conclusion with specific numbers from the tables and trace — no general statements without data references.

1. Braking

Per corner with non-zero brake@m:

• Evaluate the braking point and how fully the brakes are used (maxBrake%)
• Analyse lock%: how severe is the lockup, isolated or repeated across corners
• Evaluate coast m: long coast = cautious transition or trail braking; zero = snap release
• Compare Ventry and Vmin: large delta = hard braking deep into the corner; small = braking complete before turn-in

2. Apexes

Per corner:

• Vmin in context of the corner's speed class — over-braked or on the limit?
• gear at apex — too low (excess torque, wheelspin risk on exit)?
• gLat vs Vmin: high gLat at low Vmin = good apex loading; low gLat = missed apex

3. Exits

Per corner:

• fullThr@m vs apex@m: smaller gap = more aggressive exit
• spin%: high value = wheelspin on exit — throttle applied too early or too aggressively
• Vexit: final result — does it match the corner's speed potential
• From Trace: how thr builds after apex — stepped or smooth; any drops after reaching full throttle

4. Steering and handling

From Trace (focus on cornering zones):

• steer: any sharp sawtooth inputs or excessive corrections
• steer + yaw: zones where yaw lags far behind steer — specific understeer points
• Corners where the car refuses to rotate (high steer, weak yaw response)

5. Throttle control

GT cars have no hybrid system — traction is managed purely by the right foot and the differential. From Trace:

• How throttle is applied on exits from slow corners: abrupt or progressive
• Where slipR exceeds normal working slip — excessive wheelspin destroys tyres and slows exits
• Corners where the driver clearly over-applies throttle before the car is ready to take it

6. Thermal management

• Tf / Tr from Trace: how temperatures evolve through the lap, where peaks occur, any overheating signs
• Pirelli GT tyre operating window is approximately ~70–90°C; below = cold tyres, incomplete grip; above = degradation risk
• Tr peak per corner: which corners load the rear tyres hardest
• Brake temps from Driving cost: overheating (>900°C is a concern for GT), L/R or F/R asymmetry

7. Summary

• Top-3 time-loss zones with specific corners and root causes
• Top-3 strengths — what is done well and why
• Recommendations per problem area: what specifically to change in driving technique

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Below is the attached report. Begin analysis.