RACE DDU · THE PILOT'S MANUAL

Two lights, then everything you need.

This page has two parts. Part 1 is the one-minute overview — read it before your first session. Part 2 is the full, detailed reference — every LED, every panel, every widget, every menu — written for a pilot, not a developer. Come back to it whenever you want to get more out of the app.

① Overview — 1 min read ② Full manual — every detail

PART 1 · OVERVIEW

What RACE DDU actually does.

RACE DDU watches your live iRacing telemetry and compares it, corner by corner, against a reference lap — a clean lap of yours, a teammate's, or a Garage 61 export. As you approach each braking point it counts down 3 · 2 · 1 on five small lights, so you always know a braking point is coming — even on a track you've never driven — without hunting for a board or a kerb.

It starts as a bar small enough to forget about, and grows into exactly as much dashboard as you want — never more.

01

The countdown

Five LEDs die left-to-right over the 3 seconds before each braking point. Their colour tells you how hard that corner brakes before you even get there.

02

The Push & Lift button

It lights up the moment the app is reading your session, and dims while it waits — one glance tells you it's alive.

03

Move it, resize it, freely

Drag it from the middle to move it anywhere on screen. Drag any corner or edge to reshape it — width and height, completely independent.

04

Up to 4 dockable panels

Snap extra screens above, below, left or right of the bar. Split each into as many cells as you like and fill them from a catalogue of 101 widgets.

05

Any car, any track

Nothing is pre-loaded. Every braking point comes from a reference lap you supply — your own, a teammate's, or one you record inside the app in seconds.

06

VR ready

Runs borderless and shows up in the taskbar, so Meta Quest Link can pin it — no window frame floating in your headset.

Quick start.

Get a reference lap

Load a Garage 61 CSV, or just drive one clean lap and hit record — either works.

Launch it and go

Join your session. The five LEDs start counting down before your very first braking point.

Add panels if you want more

Right-click → Screens, dock one where you like, and fill it with whatever data matters to you.

That's the whole idea. Everything below is the same app explained in full — read on whenever you want the fine detail on any part of it.

PART 2 · THE FULL MANUAL
DETAILED · PILOT-LEVEL

Everything, in detail.

Ten sections, in the order you'll actually use them: getting a reference lap, reading the bar, docking screens, editing what's inside them, the full widget catalogue, personalizing each cell, the complete menu, VR, languages, and what gets remembered between sessions.

01 · THE REFERENCE LAP

Nothing works without one — here's why, and how to get one.

RACE DDU has no braking points memorised for any car or track. Every single countdown, every colour, comes from comparing your live position on track against a reference lap you provide. Think of the reference lap as the "answer key": one clean, complete lap that shows exactly where the throttle lifts and the brake goes down, corner by corner. Once it's loaded, the app knows where every braking point is — on any car, any track — because it read it from that lap, not from a database.

You can get a reference lap three ways:

What the CSV needs: at minimum, a Throttle column and a Brake column (0–1 or 0–100, either works). If the file also has a distance column — LapDistPct, "Distance", or similar — the alignment between your live position and the reference is pixel-perfect. Without one, the app falls back to aligning by time, which still works but is slightly less precise on laps with very different pace. Garage 61 exports and iRacing's own telemetry always include this column, so this only matters if you're building a CSV by hand from another source.

One clean lap is enough — don't overthink it. It doesn't need to be your fastest, just representative: normal braking points, no spins, no pitting mid-lap. You can always load a better one later; it replaces the old one instantly, live.

02 · READING THE BASE BAR

Five lights, one button, that's the whole base.

RACE DDU base bar: five LEDs mid-countdown next to the Push & Lift button, with GAPS, GEAR and FUEL docked around it

The five dots start lighting up, left to right, 3 seconds before the reference lap's braking or lift point for the corner you're approaching. At normal speed that's roughly one dot every 0.6 seconds. They then die off the same way, left to right, and the last one goes dark exactly on the ideal point — not a fraction early, not late. That's your cue to be on the brake.

The colour of the dots tells you, before you even reach the corner, how hard the reference lap brakes there:

LIFTblue · no brake, just lift off the throttle
<10%green · a brush of brake
10–25%yellow · light braking
25–60%orange · proper braking
>60%red · a big stop

That's it for the countdown — no big "BRAKE" banner, no numbers fighting for your attention. Five dots and a colour, read with the edge of your vision while you keep your eyes on the apex.

The Push & Lift button on the right of the bar is a quiet status light: it's at full brightness whenever the app is reading a live session (iRacing or the demo feed), and dims while it's waiting for one. A glance tells you the app is actually alive without reading any text.

Moving it: click and drag anywhere on the middle of the bar — away from its edges — and it follows your mouse. Any docked screens move with it.
Resizing it: hover any corner or edge until the cursor changes, then drag. Unlike a normal window, width and height resize independently — you can make it a short wide strip, a small square, or a tall thin column, whatever fits your wheel, monitor or headset best.

03 · DOCKING SCREENS

Grow the bar into a dashboard, one side at a time.

RACE DDU with GAPS, GEAR and FUEL panels docked around the base bar

A docked screen is an extra panel that snaps flush to one side of the base bar — top, bottom, left or right. You can have up to four at once, and each is completely independent: its own layout, its own widgets, its own size.

Turning one on: right-click the bar (or any docked screen) → Screens → pick Top, Bottom, Left or Right. It appears immediately, attached to that side. Pick the same option again to hide it — it disappears, but remembers its layout for next time.

Docked screens always follow the base bar: move the bar and every open screen moves with it, keeping the whole thing glued together as one dashboard.

Resizing a docked screen's thickness: hover its outer edge — the side facing away from the base bar — until the cursor changes to a resize arrow, then drag. That changes how much space that panel takes without touching its width along the bar. You can also nudge it in fixed steps with the size − / size + buttons that appear in edit mode.

04 · EDITING WHAT'S INSIDE

Split, fill and arrange each panel like tiles.

Each docked screen is a blank canvas you divide into as many cells as you want, then fill each one with a function. To start arranging, turn on Edit mode: right-click → Edit mode, or just press E. Every cell now shows four small buttons in its corner, and clicking its body lets you assign it a function.

Exact grid: the number in the middle of the edit toolbar shows how many cells the screen currently has. Click it to type an exact number from 1 to 50 — the screen rearranges into a clean, even grid, and keeps whatever you already had in each cell.

Proportions: once you have more than one cell, a line appears between them. Drag that line to make one cell bigger and its neighbour smaller — useful for giving more room to a graph or a bigger number.

Turn Edit mode back off before you go on track: it hides all these buttons and lines, so nothing is left to bump by accident mid-session.

05 · THE WIDGET CATALOGUE

101 things you can put in a cell, across 9 categories — the same catalogue as ADVANCE.

Click any empty (or filled) cell body to open the picker: a search box at the top, and category tabs down the left — CSV-DDU, PL Relatives, Race, Fuel and Tires, Clima, Mixed Car Inputs, Single Car Inputs, Car Info, and Others. It opens straight on the cell's current category, and whatever is already assigned there is highlighted in green so you never lose track of it. Type in the search box to filter by name or description across every category at once. The name in parentheses on each cell is always in technical English — racing's universal language.

CSV-DDU · 19

BRAKE ALERTCountdown to the braking point.
BRAKE ALERT 2Brake Alert 2: 3·2·1 and red screen.
RALLYCalls the next corner rally-style: road bends by tightness, shows the gear to take.
iR GAINEstimated iRating gain or loss.
SR GAINEstimated SR change.
REF LAPLoaded reference lap.
STINT AVGAverage of your laps since your last pit stop.
RACE AVGAverage of your laps since the start of the race.
TELEMETRY VS CSVLive speed/pedals against your reference.
COACHCorner-by-corner feedback against your reference.
BRAKE % NEXTPredicted max brake % for the next corner.
BRAKE METERSMetres to the braking point, from the CSV.
PUSH WORDThe word PUSH/BRAKE/LIFT, like the logo.
PEDALS VS CSVYour pedals against your reference, bar by bar.
FUEL-CORR PACEYour pace corrected for fuel weight.
STINT DEGWhether your pace drops as the stint goes on.
PIT WINDOWFuel laps left and whether you should pit now.
UNDERCUT/OVERCUTUndercut/overcut risk with the car ahead.
LAP TYPEWhether this lap is a push lap or a save lap.

PL RELATIVES · 7

STANDINGSClass standings: position, gap and lap times.
STANDINGS HORIZONTALSame standings in a horizontal strip.
RELATIVE BASICNearby cars, with iR/license and your last lap.
RELATIVE SPRINTNearby cars, with iR/license and your best lap.
RELATIVE POSITIONBy position, no lapped cars or classes, with your pace.
RELATIVE COMPACTJust name and iR — the minimal version.
RELATIVE FULLEverything you can show: iR, license, times, pace, pits…

RACE · 28

FLAGSCurrent session flag.
POSITIONRace position.
INCIDENTSIncident count and limit.
GAPSGap to the cars ahead and behind.
SOF · iRStrength of field and your iRating.
DELTADelta to your best lap.
DELTA BARiRacing-style delta bar.
DELTA GRAPHDelta over time graph.
SPEED GRAPHSpeed over time graph.
LAPSLap counter.
LAST LAPLast lap time.
BEST LAPYour best lap.
SESSIONSession time remaining.
LAP %Lap completion.
CLOCKLocal time.
CURRENT LAPYour current lap time, live.
LAPTIME LOGList of your last race laps.
LAPTIME SPREADYour consistency: best vs worst lap gap.
LAPTIME GRAPHBars with all your laps this session.
DIGIFLAGFlag as a digital panel, solid background.
RADARClosest car ahead and behind.
RADAR BARSAhead/behind proximity as bars.
BLIND SPOTAlert for a car very close behind (no real side data).
OVERTAKE ALERTAlert when you gain or lose a position.
HEAD TO HEAD1-on-1 duel with a rival: gap and lap times.
RACE SCHEDULEEvent session sequence (Practice/Qualify/Race).
PIT HELPERPit-lane assistant: limiter and pit speed.
TRACK MAPTrack map drawn on the fly as you drive.

FUEL AND TIRES · 10

FUELFuel level and consumption.
FUEL BARFuel as a bar.
FUEL LAPSLaps of fuel left.
FUEL CALCFuel calculator: you make it or litres short.
FUEL TARGETTarget fuel per lap to reach the finish.
TYRESAll four tyre temperatures.
TYRES 3-ZONETire temperature in 3 zones per wheel.
TYRE WEARRemaining tire tread in 3 zones per wheel.
WEAR SYMMETRYWear difference between left and right side.
PIT STRATEGYPressures scheduled for your next stop.

CLIMA · 7

WEATHERTemperatures and wind.
RAIN RISKRain risk from humidity and track wetness.
TRACK TEMPTrack temperature alone.
AIR TEMPAir temperature alone.
HUMIDITYHumidity alone.
WINDWind alone.
TRACK EVOLUTIONTrack temperature trend over the session.

MIXED CAR INPUTS · 6

PEDAL GRAPHBrake and throttle graph.
DRIVER INPUTSPedals: yours and/or the CSV's.
PEDALSAll three pedals as bars.
G FORCEG-force diagram.
COACHEAll-in-one COACH: braking + pedals + under/oversteer.
STEER SMOOTHDriving smoothness: steering wheel rate of change.

SINGLE CAR INPUTS · 6

THROTTLEThrottle input.
BRAKEBrake input.
CLUTCHClutch input.
WHEELSteering wheel at its real angle.
LAT GLateral G-force.
LONG GLongitudinal G-force.

CAR INFO · 14

SPEEDCar speed.
SPEED BARSpeed as a bar.
GEARCurrent gear.
RPMEngine RPM.
RPM BARRPM bar with shift zone.
SHIFT LEDSShift lights.
BRAKE BIASBrake bias.
ABS · TCABS and traction control lights.
ENGINEWater and oil temperature.
VOLTSBattery voltage.
BRAKE BALANCEReal brake split measured at the brake lines.
LOCKUPABS alerts (wheel lockup proxy).
CAR ATTITUDEBubble level: car pitch and roll.
FLUIDSRemaining oil and water levels.

OTHERS · 4

WELCOMEWelcome: app name, version and how the screens work.
TRACKTrack and session type.
NOTESFree text: notes, setup, message to your stream…
LOGOAnimated PUSH & LIFT logo (or your image for the stream).

Picking ∅ Empty at the top of the list clears a cell — handy while you're still arranging a layout.

06 · PERSONALIZING EACH CELL

Your colours, your labels, your units.

Click the gear icon on any cell (in Edit mode) to open its settings:

07 · MENU REFERENCE

Right-click anywhere on the bar or a screen. Every item, explained.

ReferenceLoad a CSV, start/stop recording your own lap, switch to the demo lap, or clear the current reference.
ScreensToggle Top / Bottom / Left / Right docked panels on or off.
Edit modeShows the split / settings / delete buttons on every cell, and the divider lines. Same as pressing E.
Size +/−Scales the base bar up or down in one click — the same result you'd get dragging a corner, just quicker.
Opacity +/−Makes the whole overlay more or less see-through, so it sits over the sim without hiding what's behind it.
Always on topKeeps the overlay above every other window, including iRacing itself.
Borderless overlayNo window frame, but still visible in the taskbar — the mode you want for VR pinning (see section 08).
Titled window (VR)Adds a normal title bar back — a fallback if your headset software won't show the borderless window in its pin list.
LanguageSwitch the whole interface between six languages instantly.
Help / manual…Opens a condensed in-app version of this manual.
QuitSaves everything and closes the app.

08 · VR & META QUEST LINK

Pin it once, forget it's even a window.

In its default borderless overlay mode, RACE DDU has no title bar or frame, but it still registers as a normal application in the Windows taskbar and Alt-Tab. That's on purpose: it means Meta Quest Link's app-pinning feature can find it and pin it into your headset like any other desktop window — clean, no frame floating in your field of view.

If your particular headset software doesn't list the overlay for pinning, switch to Titled window (VR) in the menu: it puts a normal window border and title bar back on, which every pinning tool recognises, as a guaranteed fallback.

09 · LANGUAGES

Six languages, one click.

English, Spanish, German, French, Italian and Chinese — every menu, every popup and the in-app manual switch instantly from Language in the right-click menu. Your choice is remembered the next time you open the app.

10 · SAVING & MEMORY

Set it up once. It stays that way.

Position, size and shape of the base bar, which screens are docked and how they're split, every widget and colour you chose, your reference lap, opacity, always-on-top, VR mode and language — all of it is remembered automatically next to the program, with nothing to configure or back up by hand. Close the app mid-session and reopen it later: everything is exactly where you left it.

↑ Back to the top
RACE DDU — the pilot's manual Download