QingTao, StarLight Carting Club🏎 4T 200cc7 laps · 5 valid2026-08-18 16:40
Fastest lap
0:33.64
Lap 5 · V max 46.8 km/h
Patch-best · near-term
0:33.54 −0.10s
Physical ceiling · motivational
−5.10s
Patch-best = stitch each segment’s own best (proven doable); physical ceiling = every corner at the grip limit (still to train). The latter already includes the former — not additive; the true ceiling ≈ 5.10s.
Lap consistency · CV
2.6%STABLE
Steady rhythm — focus improvement on corners
GPS quality CLEAN · 3790 frames · 0 despiked · 10.0 Hz
Fix first today fix one corner, win the lapT4
T4 entry speed is limited by T7 exit — get on throttle earlier at T7
This corner alone0.67s/lap
How to read this screen: the fastest lap is today’s result; the patch-best tells you how much is left by just stitching each segment’s best. The real headroom is the line work — scroll down to L1 to see exactly which corners lose time.
📷 Recording note — data range
Recording started while driver was already moving on track (start speed 23km/h). First 51s (about 462m) is an incomplete segment heading toward the start line, doesn't form a complete lap, and is excluded from analysis.

If you want complete recording from Lap 1, recommend starting recording while car is stopped in the pit, then start the timer after accelerating out of pit.
L1Where time is lostLocate which segment / corner. Not why yet.
LAP TIMES & PHASERACING laps only join optimization
LapTime (s)V maxV minV avgArc (m)Phase
L1
34.77+1.13
46.117.232.7315.5RACING
L2
34.83+1.19
46.716.733.2321.3RACING
L3
38.94+5.30
48.56.729.7322.0WARMUP
L4
35.23+1.59
45.315.632.2314.8RACING
L5
33.64BEST
46.814.033.8315.1RACING
L6
36.13+2.49
46.219.032.0322.6RACING
L7
38.94+5.30
47.80.028.6309.8INCIDENT
📐 What does Phase mean
Every lap is classified into one of six categories, so you can immediately tell "which laps are actually racing":

RACING: real racing laps, included in all optimization advice and comparisons.
WARMUP: opening laps, speed hasn't built up yet.
COOLDOWN: closing laps, already winding down.
INCIDENT: laps with a mid-lap stop (vmin near 0) — could be a crash, off-track, yielding, red flag, or marshal stop. Safety first — review what happened.
GPS NOISE: laps with many GPS position spikes (e.g. red lines flying off the track on the map). Trajectory and distance are unreliable, excluded from analysis.
NON-KART: not driving data at all (walking in pit / handling equipment).

The last five categories don't participate in lap-time comparisons — they're only shown for session completeness, avoiding polluting the analysis.
📉 Lap evolutionwarmup / fade / mistakes
Lap time vs lap number — spot tyre warmup, fatigue fade and mistake laps. Cooldown laps are excluded to keep the axis readable.
🏁 Sector composition
Split the lap into 3 sectors to locate which one drags the lap; each flags the corner most worth practicing.
S1
Corners: T1T2
0–24% · len 75m
7.71s
BEST @ L5
S2
Corners: T3T4T5T6T7
24–72% · len 150m
▸ Focus: T3 · T4
17.32s
BEST @ L5
S3
Corners: T8T9
72–100% · len 90m
▸ Focus: T8
8.51s
BEST @ L5
👻 Ghost Lap · realistic best
Stitch each lap’s fastest S1/S2/S3 into one lap = a target you can actually hit.
realistic best
0s
📐 What does Ghost Lap mean
Your actually achievable target lap time.

The idea is simple: you've already driven the fastest S1, fastest S2, fastest S3 in different laps — stitching those three best segments into one lap gives you the Ghost Lap. It's not fantasy; it's capability you've already demonstrated.

The other number, Sum of Corner Gaps, is the physical upper bound "if every corner were driven perfectly" — reference value, not realistic, because corners constrain each other.

Treat Ghost Lap as your target, Sum of Corner Gaps as motivational ceiling.
🛰 Track map · mini-sector
Lap split into 24 equal-distance segments; each colored by how much slower it is than that segment's own fastest across all laps. Purple = segment-best, green→yellow→red = bigger loss. Pick a lap below to recolor; toggle the satellite view for real imagery.
Pick a lap
segment-best
bigger loss →
🏁 S/F corner sector top spd
📐 What does Track Map show
Overhead view of the track, with every lap's actual trajectory drawn on a satellite basemap.

Different colors = different laps, easy to compare racing lines.
Orange glowing dots = coast hesitation, marking segments where you neither braked nor accelerated — these are usually places where you're losing lap time for no reason.

After other modules pinpoint a problem, come back to this map to see exactly which corner it happens at.
🔥 Sector × Lap time deltagreen=fastest · redder=slower
Rows = sectors, columns = laps; cell = how much slower than that sector’s own fastest lap. ★ = fastest.
📐 What does this heatmap show
Helps you answer: "A specific lap was slow — slow in which sector?"

X axis = laps, Y axis = sectors. Greener = better performance in that sector (★ = sector's fastest); redder = more behind.

For example, if one lap is 0.4s slow overall and the heatmap shows S2 alone is 0.3s slow, then improvement should focus on corners in S2, not generic "drive faster".
🎯 Corner improvementsorted by savable time
How much faster the apex still can be (speed ceiling). Continuous corners (e.g. T2←T1) improve at the *previous* corner.
Potential is estimated from GPS-fitted corner radius (medium confidence) — focus on *which* corners to practice; absolute seconds are indicative.
L2WhyPer-theme deep dive: data + matched advice.
A
📈 Speed + Δ time
Where did speed not keep up, and how much time piles up there?
46.8 km/h
Top speed
Two stacked plots: top = speed, bottom = Δtime vs the fastest lap. Shared lap legend — click a lap to toggle both.
Speed (km/h)
Δ time vs fastest (s)
📐 What does this chart show · Reading the Δ Time subplot
Every lap's speed at the same track position is overlaid, so you can see "at a specific spot on the track, exactly where is the gap between the fastest lap and your lap".

X axis is relative track position (lap start to lap end), not time — so laps of different speeds can still be directly overlaid at the same corner apex.

Top — Speed (km/h): each line is a lap's speed curve.
  • Bold green ★ = best lap
  • Normal brightness = the next 3 fastest laps
  • Semi-transparent background = other valid laps (still shows the "spread band" width without stealing focus)
  • Click legend to toggle any lap on / off

Bottom — Δ Time vs Best (s): standard "where am I losing time" view used by MoTeC i2 / FastF1.
  • Y axis = cumulative time this lap is behind best lap at this position (green dashed = 0 = best itself)
  • Slope going up (more positive) = this segment you're slower than best, steeper = losing more
  • Flat / down slope = this segment you match or beat best
  • The steepest ramp = where you're losing time on this lap (usually a specific corner)

Clicking the legend toggles a lap — both subplots show / hide together (shared legendgroup).

Gold S1 / S2 / S3 labels and faint bands at the top map to the three sectors above — so you can directly locate a curve segment to a specific sector and its corners.
B
🏁 Racing line · best vs worst
Same corner — how do your best and worst lines differ? Apex early or late?
Best (green) vs worst (red) line for each top corner, ★ = apex.
📐 What does this chart show
Picks the "3 corners with highest potential" and overlays your best lap and your worst lap on the same chart, so you can directly see "what line I took when I got it right, and what line when I got it wrong".

Green = best lap's trajectory at this corner, red = worst lap's; ★ = that lap's apex.

Seeing the difference between the two lines (entry point, apex, exit direction) is the most direct way to turn potential into result.
C
🔄 Grip · friction circle (G-G)
How much grip do brake / accel / cornering actually use?
IMU long · GPS lat
G-G scatter: X = lateral G (left↔right), Y = longitudinal G (brake↑ accel↓). Outer points = more grip used.
📐 First time? 30-second guide

This chart tells you "how much of your tire's grip you actually used".

Principle (10 sec)
Total tire grip is fixed. You ask it to do 3 things: accelerate (throttle) / decelerate (brake) / turn. Do several at once, each gets less. The usable limit drawn out is a circle — that's the "friction circle". Good driving = always at the circle's edge (using all grip); conservative = clustered near center (wasted).

How to read (axes and forces)
• X axis = cornering G. Right = right corner, Left = left corner.
• Y axis = decel/accel G. Up = braking, Down = accelerating.
• Each dot = an instant on your best lap, color matches which corner (T1-T12, gray = straight).
Red dashed circle = your session's grip limit.
• Gray thin dashes = 0.5g / 1g / 1.5g reference circles.

What problems can you spot (4 signal types)

  • Crowded center, sparse edge — grip underused, driving conservatively / not pushing hard.
  • Empty bottom (sparse lower half) — no trail braking, you "brake then turn", losing 0.1-0.3s/corner (most common issue).
  • Missing half of left/right semicircle — that direction's corners aren't using full grip (track-biased / you fear that direction).
  • Too flat vertically (narrow top-bottom) — brake/accel intensity both weak. Karting has smaller longitudinal G than lateral (engine torque limited) which is normal, but near-zero longitudinal spread needs diagnosis: check your hardest brake — under 0.4g for the whole session means car/tire/surface physical limit (drum brake / rental kart common), not your problem; 0.5g+ peak but persistent 0.2g means soft brake style, you can push harder.

How to improve (specific actions)
1. Main gap = bottom (insufficient trail brake): see "weak corners" at top. At these corners you brake-then-turn. Try: in the last 0.5-1s before entry, keep light brake while starting to turn (release brake a beat later than steer-in). This shifts weight to front tires, increases grip, allows higher entry speed.

2. Main gap = accel phase: hesitation between brake-release and full throttle on exit. Try: on exit go straight to full throttle, let car find its own limit.

3. Main gap = one side's corners: in that direction, push harder, steer to limit, see if car understeers (understeer = true limit).

Note: G values inferred from GPS speed + heading (no IMU). After 0.2s smoothing + extreme clipping, karting scenario error ±5%. Only A-type braking corners count for trail brake evaluation; K-type high-speed kinks don't brake and don't count.

D
🎯 Consistency · Apex
Can you reproduce your best lap's moves every lap?
Unlike L1 (how much faster you could go), this asks: can you replicate your best every lap?
📐 What does this chart show · Reading the boxplot
One boxplot per corner, showing distribution of apex speed across all laps at that corner — the standard visualization used by FastF1 / PITWALL and other F1 lap-time analysis tools.

How to read:
  • Box (cyan rectangle) = Q1-Q3, middle 50% of lap distribution
  • Solid white line = median (typical level)
  • Dashed white line = mean
  • Top / bottom whiskers = extremes (excluding outliers)
  • Dots = each lap (hover to see which L#)
  • Gold ★ = best lap's apex speed at this corner (capability ceiling)
Note: worst lap not marked separately — whiskers already show the extreme range, double-marking would clutter.

How to use:
  • Narrow box: strong apex-speed repeatability at this corner (steady rhythm)
  • Wide box / long whiskers: unstable, big lap-to-lap variation → improvement focus
  • Gold ★ far above median: you've done it once — there's room to bring the slower laps up
  • Outliers (dots far from box): a specific lap had an incident at this corner (crash / yield / error) — hover to see which lap
  • Distribution biased high / low: high = most laps near best; low = most laps lagging
E
📊 Driver profile · radar
What kind of driver are you? Strengths and weak spots?
  • 💪Strength · Exit Throttle100/100This dimension is your top strength.
  • 🎯Improve · Smoothness11/100Symmetry of corner entry / exit can be smoother — more even braking in, earlier throttle out, the whole sequence flows better.
  • 🎯Improve · Apex Discipline13/100Each lap's apex position can be more consistent — treat brake → turn-in → apex as one fixed sequence, copy best lap's rhythm.
📐 What do the 6 dimensions mean
This session's "driving fingerprint", showing strengths and weaknesses at a glance:

  • Aggressiveness: how hard you brake and how aggressively you accelerate.
  • Smoothness: symmetry / fluidity of corner entry-exit, vs. abrupt stab-and-release.
  • Late Braking: how late you dare brake — closer to apex = more aggressive.
  • Apex Discipline: how consistently each lap hits the same apex (line discipline).
  • Exit Throttle: how quickly you can get back on throttle after apex (exit efficiency).
  • Consistency: whether lap times are stable, or fast-slow vary wildly.

Single-session sample is small and scores have noise — focus on the radar's overall shape and labels, not specific numeric scores.
L3Raw data · trustUnderlying data, methodology disclosure, full coach debrief.
Key Observations
  • 5 valid laps; fastest L5=33.64s, slowest valid L6=36.13s, gap 2.49s.
  • Lap-time CV = 2.3% (<5% consistent pace, 5-10% improvable, >10% erratic).
  • L3=38.94s flagged as outlier (likely cooldown / pit-in / pit-out).
  • L7=38.94s flagged as outlier (likely cooldown / pit-in / pit-out).
  • Most consistent corner: T6 (apex speed std=0.13 km/h, mean 25.2 km/h).
  • Biggest opportunity: T7 (apex speed spread 9.5 km/h, best L1=34.6 km/h vs worst L6=25.1 km/h).
  • Hardest braking: L3 at 17.7s, -1.21G (held 1.20s, 36.9 → 9.5 km/h).
  • Strongest acceleration: L2 at 10.9s, 0.30G.
Data quality · trustCLEAN
GPS jump rateHigh
3790 frames · 0 single-frame despikes
0.0%
Sample rateOK
10.0 Hz · enough for apex / brake-point fixing
10.0 Hz
G-force sourceInferred
Helmet mount · lateral from GPS
Lon-only
Track extentMeasured
50 × 49 m · small circuit
379 s
Conclusion confidence
Friction circle / G-G & brake detail are low-confidence estimates (helmet mount · lateral from gps). Lap times / line / sectors are unaffected.
Start/finish line is auto-detected (not manually calibrated).
Corners T5 appear in only part of the laps (min 40% hit) — apex stats have fewer samples.
🎙
Lao ZhangAI veteran debrief

Opening
Your best lap was 33.64s, but the theoretical 3-sector best is 33.54s, leaving a recoverable 0.1s. S2 seems to be the most inconsistent sector, with the biggest gap from the best time.

Style sketch
You're an aggressive late-braker with an early throttle application. Your rhythm is steady, but your racing line tends to drift outside.

Top corners to improve
- T4: T4 sits right after T7. T7 releases you at 31.0 km/h, capping T4's entry speed. The real ceiling for T4's apex is around 31.0 km/h. Your best apex was 25.9 km/h, leaving a 5.1 km/h gap and about 0.67s per lap on the table. The issue is that T7's exit speed isn't high enough, limiting T4. Next session, try to get on the throttle earlier at T7's exit to boost T4's entry speed. Aim to exit T7 at 35 km/h to carry more speed into T4.
- T3: T3 has a turning radius of 5.5m, with a grip ceiling of 28.9 km/h. Your best apex was 25.4 km/h, 3.5 km/h below the ceiling, worth about 0.44s per lap. You're braking too early and not carrying enough speed through the apex. Next time, brake 5m later, starting at around 40m before the apex, and aim for an apex speed of 28 km/h.
- T8: T8 has a 5.3m radius and a grip ceiling of 28.5 km/h. Your best apex was 26.6 km/h, 1.9 km/h off the ceiling, costing about 0.31s per lap. Your braking point varies a lot, and you're not using the full track width. In the next session, brake 10m later, around 25m before the apex, and target an apex speed of 28 km/h.

Consistency observation
T5 and T6 have significant time gaps between your best and worst laps. At T5, your best lap was 6.3s and your worst was 6.9s, a 0.6s difference. At T6, it's the same 0.6s gap. The problem is mainly the inconsistent braking points and throttle application. Try to replicate your best lap's operations, braking at 57m before the apex and getting on the throttle 2m after the apex.

Rhythm observation
Your rhythm is decisive; you skipped the newcomer trap.

Safety note
On L7, I saw your speed drop to 0 km/h mid-lap — that looks like a mid-lap stop. Hope you're okay. What happened — contact, off-track, or yielding for someone? That matters more than lap time.

Closing
You've shown good potential, especially in your best lap. For the next session, focus on improving T4 by getting on the throttle earlier at T7's exit. This will help you carry more speed into T4 and reduce your lap time.

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