Performance Review · iRacing and Le Mans Ultimate

The iRacing Driving Coach
That Tells You Why.

Performance Review is the iRacing lap analysis and driving coach built into Track Impulse, and it now works in Le Mans Ultimate too. It records every lap while you drive, reads your whole stint instead of one lucky lap, and hands back a corner-by-corner time budget that adds up to your real lap delta. Every finding names the cause, gives you a target, and says what fixing it is worth in seconds.

Download Free Beta See the Overlay Suite
iRacing Le Mans Ultimate Every lap coached Nothing to start or stop Runs on your PC Pro, free during beta
The Track Impulse Performance Review window on the Coach tab for a BMW M2 Racing at Tsukuba in iRacing: session and lap lists on the left, a lap coached against a community reference with ranked findings for T5-8, T1 and T9 in the centre, each with a cost in seconds, a what you are doing right entry for T3-4, a track map coloured by throttle and brake, and speed, pedal and delta traces on the right.

The Coach tab, iRacing. Every finding carries a cause, a target and a cost in seconds.

At a glance

Telemetry Tools Show You Where. This One Shows You Why.

Every telemetry tool can tell you that you were slow in Turn 5. Performance Review measures what you did with the brake, the throttle and the wheel, then says which of those cost you the time, by how much, and what to change. It is measured telemetry analysis, not a prediction engine, so every number on screen traces back to a lap you actually drove. It is the post-session half of the sim racing coach, which also talks you through the lap while you are still in the car.

Where The Tsukuba circuit drawn from recorded laps and coloured by pedal input: red where the brake is applied, green where the throttle is open, grey where the car is coasting, with numbered turns, sector markers and the start finish line.
Where A map of the lap with the braking zones marked. Useful, and roughly where most telemetry tools stop.
Why Three coach findings for Turn 1 from the same lap: get to full throttle 0.4 seconds sooner because your speed through the corner is fine and the exit is where it costs; you carry 38 percent more steering lock for the same grip so the front is sliding; and squeeze the throttle once instead of lifting 2 times, with a worth in seconds on each.
Why The same corner, in sentences. An exit left slow, a front that is sliding, and a throttle you lift twice, each with a cost.
Two coach findings for Turns 5 to 8: close the 1.5 second gap between brake release and throttle by carrying the brake deeper or picking the throttle up sooner, where the reference coasts 0.3 seconds; and ease the brake off over more distance instead of dropping it, because the sudden release unsettles the car mid-corner. Each worth about 0.12 seconds.
Cause Two findings, same corner. One is the coast between the pedals, the other the brake release that causes it. Each is priced at 0.12 s.
A coach finding for Turn 1: you carry 38 percent more steering lock for the same grip, the front is sliding, so release a little entry speed or open the line. Worth about 0.02 seconds.
Cause Steering is read too. More lock for the same grip than the reference means the front is sliding, not gripping.
01 / The finding

It Names the Cause,
Not Just the Gap.

A lap time tells you the total. A delta trace tells you where. Neither tells you what you did wrong. The Coach names it: over-slowed entry, arriving too fast and paying on exit, coasting between the pedals, a lazy trail brake, an abrupt brake release, braking softer than the car can take, the wrong gear on exit, an unsettled entry, a front that is scrubbing, throttle picked up before the car is ready, an exit left slow when the corner itself was fine, or grip you are simply not using.

One cause, one instruction, one number. No finding ships without a target to drive to, so you always know what to change, by how much, and what it pays. It splits symptom from cause, too: it will not tell you to stop sawing at the wheel, because the sawing is a symptom. It finds the abrupt brake release that caused it. And when the same mistake shows up across three corners of the same kind, the Coach calls it what it is: one habit, one fix, priced as the sum of what it costs you.

"Get to full throttle 0.4 s sooner out of T1: your speed through the corner is fine, the exit is where it costs. Worth about 0.08 s"

"Close the 1.5 s gap between brake release and throttle in T5-8: carry the brake deeper or pick the throttle up sooner (reference coasts 0.3 s)"

Real output, iRacing, BMW M2 Racing at Tsukuba
The coach header for lap 9 at 1:03.303 against a community lap: this lap 0.64 seconds off, split into T5-8 0.41, T3-4 0.16 and T2 0.09, with a line stating the top two findings are worth 0.23 seconds of your 0.64 second gap.
Budget The lap it is coaching, the split, and the priority line, in three rows.
02 / The time budget

A Lap Breakdown
That Actually Adds Up.

The Coach splits your lap into sections and puts a cost on each one. Those costs sum to your real lap delta, to the hundredth. 0.64 s off: T5-8 costs 0.41, T3-4 costs 0.16, T2 costs 0.09. Nothing is hand-waved and nothing goes missing.

It also does the prioritising for you. One line states how much of your gap the top findings account for, so you know whether you are chasing one big fix or five small ones before you go back out.

  • A cost in seconds on every corner and every straight
  • Findings ranked by what they are worth, not by turn number
  • A single line for how much of the gap the top two cover
  • Every number tied to the laps it came from
The top findings bar along the bottom of the window: T5-8 worth 0.41 seconds, close the gap between brake release and throttle; T5-8 worth 0.41 seconds, ease the brake off over more distance; T1 worth 0.08 seconds, commit to full power sooner because the exit is where it costs.
Priority The three findings that matter sit pinned along the bottom of the window, in plain language, while you are still in the pits.
The session summary and lap list: best 1:03.210, average 1:35.260, a throttle brake and coast split of 60, 27 and 14 percent, 0 to 60 in 12.55 seconds, top speed 173 kph, air 23C and track 36C, then nine laps with times, speed and delta: lap 1 an out-lap over ten seconds off, lap 7 a five and a half minute tow, lap 5 the personal best, lap 9 selected with a Share button, and the community reference lap named beneath the list.
Stint Nine laps. The out-lap and the tow lap never get a vote; advice is built on the laps that were really yours.
03 / The sample

Coached on Your Whole Stint,
Not One Hero Lap.

One lap can lie. A single clean lap flatters you in the corners you got right and hides the habit that costs you every other lap. The Coach reads all of your clean laps together and tells you how many laps each finding is based on, so you are coaching the habit, not the fluke. And when you want to drill into one lap, click it and the Coach re-runs on that lap alone.

Dirty laps never get a vote. Out-laps, in-laps, invalid laps and laps spent stuck behind another car are excluded automatically, and the window shows you which ones were left out and why. And when your own typical lap is a long way off your own best, it says so, because repeating a lap you have already driven is cheaper than finding new speed.

"Your typical lap is 1.21 s off your best, and the biggest swing is in T1-3. Repeating your own good lap is worth more than finding new speed. Worth about 1.21 s"

Coach output, whole-stint scope
The corner detail pane for Turn 4 titled corrections: a speed trace with a band showing your lap-to-lap spread against the reference, a brake and throttle trace, a steering trace labelled 8 corrections, and a trail brake row reading brake at turn-in 57 against 42, brake at apex 0 against 0, trail metres 75 against 72, re-applications 0 against 1 and peak G 1.56 against 1.55.
Detail Focus a corner and the Coach opens the evidence: speed spread, pedals, steering and the trail brake measured against the reference.
04 / The technique

Trail Braking and Steering,
Measured.

Trail braking is where lap time hides, and almost nothing shows you yours. The Coach measures how you actually release the brake: how much pressure you carry to turn-in and to the apex, how far the release takes, whether it is one clean taper or a series of stabs, and how much of the tyre you are using while you do it.

Steering gets the same treatment. Corrections mid-corner are counted against the reference, so an unsettled car shows up as a number rather than a feeling. This is the stuff a human driver coach charges by the hour for, and it runs on every lap you drive.

  • Brake pressure at turn-in and at the apex, yours against the reference
  • Trail distance in metres, and how many times you re-applied
  • Peak G through the corner, so you can see the grip you left
  • Steering corrections counted, mid-corner, per turn
Two things most tools never show you

What You Are Doing Right,
and Where the Straight Went.

It keeps a list of your gains

Real coaching is not just a list of faults. Alongside the problems, the Coach keeps a separate list of what you already do better than the reference: more apex speed here, on the power earlier there, a proper trail brake into the hairpin. Knowing what to keep matters as much as knowing what to fix, and it tells you when your pace is building through a stint.

The what you are doing right list: carrying 5 kph more than the reference through T3-4, keep that.
Gains Green means keep doing it.

Straights get blamed on the corner

Exit a corner two kph down and you bleed time all the way down the next straight. Most tools report that as a straight-line loss, which is useless, because the straight is not the problem. The Coach attributes the loss to the corner exit that caused it, and when the exit does not explain the loss it says so and points at the gearing instead.

A straight losses finding worth 1.20 seconds: time lost on the straight after T10-11 that the corner exit does not explain, so check the upshifts and keep it pinned.
Straights 1.20 s on one straight, traced back to a cause.
The this combo panel showing an all-time personal best of 1:02.725 set on 30 July, 16 sessions across 94 laps, and the community best of 1:02.725 with your gap to it reading 0.000 seconds.
Combo Your all-time best for this car and track, next to the community best.
The trail brake comparison row with a note that the community side is one lap against your median and that lap times are user-reported.
Honest The app states the limits of the comparison on screen: one community lap against your median.
05 / The reference

Compare Against Real Laps
From Real Drivers.

A leaderboard gives you a number to feel bad about. Performance Review lets you download the whole lap. Pull a reference lap from another driver in your car at your track, with the full telemetry trace, then overlay their brake pressure through a corner against yours and see exactly how they do it.

Sharing is opt-in and anonymous by default, and you control every lap you share. Because the laps come from other drivers rather than an official timing feed, the conditions and the setup can differ, so the window says which lap you are up against and in what weather. Nothing is dressed up as a verified record.

The whole board is public. Browse the community lap times by track, car or race week to see what is already there before you install anything.

  • Coach against your PB, any lap you select, or a community lap
  • Beat your PB mid-session and the reference updates immediately, so you are never measured against a lap you have already beaten
  • Community laps arrive with full telemetry, not just a time
  • Weather, track temperature and date shown on every reference
  • Share a lap with one click, unshare it just as fast
The compared-to row: chips for VS PB, VS SELECTED and COMMUNITY with community selected, and the reference lap identified as Dennis Marinos 1:02.725 on 30 July 2026 in 22C air and 38C track, dry.
Reference Coach against your PB, any lap you pick, or a community lap. The date and the conditions sit on screen so you can judge the comparison yourself.
What the Coach measures

What the Coach Finds,
and What You Get Back.

Each row is a real class of finding the Coach produces from your telemetry. The wording changes with your data, the shape does not: a cause, a target, and what it is worth. These are the main classes; the full catalogue is longer still.

Finding
What it tells you
You get
Brake point
You brake earlier than the reference and give up entry speed
Metres later + kph to the apex
Brake build
Pressure comes on too slowly: 144 m to peak against a reference 39 m
Target distance to peak
Trail brake
You release too early and unload the front before the apex
Pressure to hold at the apex
Brake release
The brake is dropped rather than eased, unsettling the car mid-corner
Ease off over more distance
Under-braking
You peak at 70 percent pedal where the reference uses 95
Peak pressure to trust
Coasting
A gap between brake release and throttle the reference does not take
Seconds of coast to remove
Unused grip
Your best pass pulled 1.51g here, your typical lap only 1.29g
Percent of grip left on the table
Unsettled entry
8 steering corrections mid-corner against the reference's 6
Correction count, per turn
Front scrubbing
More steering lock for the same grip than the reference: the front is sliding
Entry speed or line to open
Slow exit
Your speed through the corner is fine, but full power comes 0.4 s late
Seconds sooner to full throttle
Early throttle
Throttle picked up before the car is ready, so full power arrives late
One later, committed pick-up
Throttle stabs
Lifting two or three times on exit instead of squeezing once
One progressive throttle
Wrong gear
Exit rpm sits below the reference's band, so the straight is soft
The gear to take
Habit
The same mistake in three corners of the same kind
One fix, priced as the sum
Straight loss
Time bled down the straight, attributed to the exit that caused it
Exit fix, or check the upshifts
Consistency
Your typical lap is 1.21 s off your own best, and where the swing is
The corner to repeat first
Gains
On full power 0.4 s earlier than the reference out of T4
Keep doing this
06 / The suite

Nine Views on Every Stint,
Not Just a Coach.New

The Coach is the headline, but it sits inside a full review app. The track layout is learnt from your own laps and drawn to scale, with no track database and nothing to download, then painted with whatever you want to see: speed, brake pressure, throttle. Click a corner and the detail pane opens your speed, brake, throttle and steering against the reference.

The Speed view: the Okayama circuit drawn to scale from recorded laps and coloured by speed from blue through green and yellow to red, with numbered turns, corner names, sector markers and a colour scale topping out at 227 kph.
Speed view The layout is learnt from your laps, then coloured by speed. Brake and throttle get their own maps.
The trace panel under the map: a speed trace for lap 4 against the community lap, a throttle and brake trace, a delta trace reading plus 0.45 seconds, and a readout row showing distance, speed, throttle, brake, steering, lateral G, gear, RPM and delta at the cursor.
Traces Speed, pedals and delta under the map, with a live readout at the cursor.
View
What it gives you
Speed
The track coloured by speed, with your trace against the reference
Brake
Where and how hard you brake, mapped onto the circuit
Throttle
Where you are on the power, and where you are not
Corners
A corner-by-corner breakdown with a detail pane per turn
Compare
Any two laps overlaid, with the delta between them
Line
Your driven line against the reference, metre by metre
Community
Shared laps for your car and track, with full telemetry
Sectors
Sector times and sector deltas across the stint
Coach
Ranked findings with a cause, a target and a cost in seconds
Yours, on your PC

Your laps live on your own machine and the analysis runs locally. There is no cloud telemetry service and no monthly fee to look at your own driving. The internet is only involved if you want community laps. Every lap can also leave as CSV, or the window as an image, if you want to take it elsewhere.

The other half

It Also Coaches You
In the Car.

Performance Review is the post-session half of the coaching. The other half rides with you. The live coach names one thing to change for the corner ahead and speaks it aloud, so your eyes never leave the track. Cross the line and a post-lap verdict names the single most valuable fix for the next lap, with the expected gain. It can even mark the reference braking point with a haptic pulse through your bass shakers, which no audio-only coach can copy.

It knows when to shut up, too. In a race it is off unless you opt in, tips are suppressed in battles, side by side, under yellow flags and on pit road, and it stays quiet until it has three clean laps of evidence. Read about the live coach.

One install

The Review App Comes With
The Rest of It.

Performance Review ships inside Track Impulse, next to 23 on-screen overlays and the haptic engine. That means one download gives you the lap analysis, a radar spotter, relative, standings, a fuel calculator and a dashboard, plus telemetry to bass shaker in as low as 2ms. Measured head to head in iRacing, that path runs at 8ms against SimHub's 137ms.

The haptics are optional. If you never plug in a bass shaker, the review app and the overlays work exactly the same. If you do, the per-corner effect engine is already installed, and the same telemetry feeding your coach is feeding your seat.

Performance Review

Nine views, the Coach, community laps and CSV export. iRacing and Le Mans Ultimate.

23 overlays

Radar spotter, dashboard, relative, standings, fuel, battle bar and more, across 12 sims. See them.

Haptic engine

Per-corner, physics-derived bass shaker effects at as low as 2ms. See the effects.

FAQ

iRacing Lap Analysis:
Common Questions.

What is Performance Review?
Performance Review is the lap analysis and driving coach built into Track Impulse. It records every lap you drive in iRacing and Le Mans Ultimate automatically at 60 samples a second, then breaks your stint down across nine views: speed, brake and throttle heat maps, corner detail, lap comparison, driving line, community laps, sectors and the Coach.
Which sims does it work with?
iRacing and Le Mans Ultimate. Both get the full thing: every lap recorded, all nine views, the Coach and the community boards. The two sims stay separate, each with its own lap history, and a picker in the title bar chooses which game you are looking at. The Track Impulse overlays and the haptic engine cover twelve sims; lap recording and coaching need telemetry channels the other sims do not publish yet.
Do I need to start a recording?
No. There is nothing to start, stop, configure or export. Run iRacing or Le Mans Ultimate and every lap is captured while you drive, practice, qualifying and race alike. Open the window afterwards and the whole stint is already there.
Does it coach me while I drive too?
Yes. The live coach names one thing to change for the corner ahead and speaks it aloud, with the size of the correction and what it is worth. Cross the line and a post-lap verdict names the best fix for the next lap. It can even mark the reference braking point with a haptic pulse through your bass shakers. Performance Review is the post-session half of the same coaching.
Can it tell when my pedals are the problem?
Sometimes, yes. If your throttle never reaches 100 percent across a whole stint, the window says so and suggests checking your pedal calibration, because a pedal that tops out at 90 percent quietly caps the car and skews any full-throttle analysis until it is fixed.
Is it AI coaching?
No. It is measured telemetry analysis. Every sentence comes from numbers taken off your own laps, which is why each one carries the figures behind it and why the corner costs sum to your real lap delta. It cannot invent a finding that is not in the data.
Does it need an internet connection or a subscription?
No. Your laps stay on your own PC and the analysis runs locally. There is no cloud telemetry service and no monthly fee to see your own driving. The internet is only used if you want to download or share community laps.
Where do community laps come from?
From other Track Impulse users who chose to share them. Sharing is opt-in and anonymous by default, and each lap arrives with its full telemetry trace, not just a time. Because they are user-shared, conditions and setups can differ, so the app shows the date, air and track temperature and weather on every reference lap.
How much does it cost after beta?
Performance Review is an Overlays Pro feature, and Pro is free for the whole public beta. After that Pro is $3 a month, cancel anytime. Fourteen overlays stay free permanently, including the radar spotter, relative, standings and the fuel calculator, so you never need Pro to race safely. Buying the haptic engine ($39.99 one-time, or $24.99 if you activate during beta) includes six months of Pro. See the overlay pricing and the haptics pricing.
Can I get the data out?
Yes. Any lap can be exported to CSV, and the window itself copies to an image in one click for sharing a finding in Discord or a forum thread.

Updated 16 August 2026 · Written by Dennis Marinos, Track Impulse

Get Performance Review

Drive. Then Find Out Why.

Install Track Impulse, drive a session in iRacing or Le Mans Ultimate, and open Performance Review. Your whole stint is waiting, coached, corner by corner. A Pro feature, free for the whole public beta. No credit card.

Download Free Beta See the Overlays
Related Pages
→The Sim Racing Coach: Live Coaching and What It Costs →The Overlay Suite: 23 Overlays for 12 Sims →iRacing Overlays Guide: Every HUD Panel Explained →Sim Racing Haptic Effects Explained: The Seven Effects →Track Impulse User Guide: First-Time Setup →Why Bass Shaker Software Is Slow: The Latency Stack Explained →Download Track Impulse Free During Beta