Three different ways to see your data in real time. Here's what each one actually does, how Delta-T and Delta-V work, and which one belongs in your car.
Avoid unnecessary pit lane penalties or lost time with VBOX Pit Lane Timer
If you've spent any time looking at VBOX Motorsport gear, you've probably run into three names that sound like they might do the same thing: the OLED Display, the Lap Timer, and the Pit Lane Timer. They don't. Each one solves a specific problem, and understanding the difference is the fastest way to spend your budget on the right piece of hardware instead of the wrong one.
This guide walks through what each device actually shows you, explains the two terms you'll see on every spec sheet (Delta-T and Delta-V), and breaks down every display mode so you know exactly what you're looking at once it's mounted in your car.
Delta-T is short for "delta time," and it's simply the time difference between your current lap and a reference lap, usually your fastest one, shown continuously as you drive rather than only at the finish line. A positive number means you're behind that reference pace at this exact point on track; a negative number means you're ahead of it.
The part that actually matters is how that comparison gets calculated. Older lap timers measured distance, usually from a wheel speed sensor, to decide where you were on the track relative to the reference lap. The problem is that distance traveled changes lap to lap. Take a slightly different line, get held up behind traffic, or lock a wheel under braking, and a distance-based system starts comparing the wrong points on the track to each other. On a short track that error is small. On a long, complex circuit like the Nurburgring or Spa, it compounds fast.
The Lap Timer and OLED Display both calculate Delta-T from GPS position instead of distance. That means the system is always comparing the same physical point on the racing surface, regardless of the line you took to get there, holding 0.1 second precision around the entire lap. That's what "position-based Delta-T" means when you see it on a spec sheet, and it's the reason these numbers stay trustworthy even when your driving isn't perfectly consistent lap to lap.
The Pit Lane Timer uses the word "delta" too, but for something different: the pit-to-exit delta covered further down. It isn't lap-to-lap Delta-T, and the Pit Lane Timer doesn't do predictive lap timing.
Delta-V, or "delta velocity," is a different comparison, and one that also lives on the Lap Timer and OLED Display specifically. Instead of telling you how much time you've gained or lost overall, it tells you how your current speed compares to your fastest lap's speed at this exact same point on track, right now, in real time.
This is what the LED strip above the display is actually showing you. Up to six LEDs change color to indicate whether you're currently carrying more or less speed than your best lap did at this spot, so you get instant feedback without having to read and interpret a number while you're still braking into a corner. Delta-T tells you the story of the whole lap so far; Delta-V tells you what's happening in this exact instant, which is why the two are shown together rather than as alternatives to each other.
In practice, most drivers use Delta-V as the thing they glance at mid-corner (are the LEDs green or red right now?) and Delta-T as the thing they check on the straights to see how the lap is shaping up overall.
How position-based Delta-T stays accurate even when your line changes from lap to lap, and why that matters more the longer the track gets.
| OLED Display | Lap Timer | Pit Lane Timer | |
|---|---|---|---|
| What it is | A display only, no GPS of its own | A standalone GPS logger and display in one unit | A standalone GPS logger and display in one unit |
| Needs a separate logger? | Yes, an HD2 or Video VBOX Pro | No, works on its own | No, works on its own |
| Primary job | Puts your HD2's live data in front of the driver | Finds time on track, lap after lap | Nails the pit lane speed limit and pit box exit timing |
| Update rate | Matches connected logger | 10 Hz (Mini) or 25 Hz (S/R) | 10 Hz (Mini) or 25 Hz (S/R) |
| Logs its own data? | No, logs through the connected HD2 | Yes, to onboard SD card | Yes, to onboard SD card |
| Best for | HD2 owners who want live in-car feedback | Drivers chasing lap time and consistency | Teams and crews avoiding pit penalties |
Many teams run more than one of these together. The OLED Display and a standalone Lap Timer solve different problems even though they show similar information, and the Pit Lane Timer is solving a problem neither of the other two touches at all.
Full-size and compact versions of each, plus the secondary pit crew display.
Full-size display for the HD2 or Video VBOX Pro. 3.5 m lead, six Delta-V LEDs.
Same display, smaller housing, 3.6 m fixed lead, suction mount included.
25 Hz standalone GPS logger with predictive Delta-T display, side or rear connector.
10 Hz version in a 50 x 50 x 26.7 mm housing, for single-seaters and tight cockpits.
25 Hz pit lane speed and exit timing, with pit-to-exit Delta on the LED strip.
Same functionality as the full-size unit in a 50 x 50 x 27 mm housing.
Mirrors the Pit Lane Timer's countdown on a second screen for the crew. Requires the full-size Pit Lane Timer, not compatible with the Mini.
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Cycle through these with the up/down buttons on the front panel. Every mode is being calculated in the background at all times, even when it's not the one on screen.
Your current speed, updating in real time.
The highest speed reached so far this session.
A running count of completed laps this session.
Your current lap time, live, as you're setting it.
Live time difference against your fastest lap, calculated from GPS position, plus the Delta-V LED strip.
Cornering force, useful for spotting where you're carrying (or leaving) grip on the table.
Acceleration and braking force, front to back.
Above the screen on both the Lap Timer and OLED Display sits a strip of up to six LEDs. These aren't decoration, they're the Delta-V readout, showing your speed relative to your fastest lap at this exact point on track, updating continuously as you drive.
This is what makes Delta-V genuinely useful mid-lap: you get a glanceable signal instead of a number you'd have to read and interpret while still on the brakes.
The Pit Lane Timer shows different information depending on where you are on track, switching automatically rather than requiring you to cycle through screens.
Out on circuit, it shows your running time from pit stop to pit stop.
Once you cross the preset pit entry point, it switches to your live speed until you come to a stop.
After you stop, it counts down to the exact moment you should leave to avoid a speeding or early-release penalty.
Only the full-size Pit Lane Timer (S or R) can drive a Secondary OLED Pit Display for the crew. The Mini Pit Lane Timer does not support it, there's no second-screen option for the compact unit, regardless of firmware.
| Unit | Secondary OLED Pit Display |
|---|---|
| Pit Lane Timer (S / R) | Yes, firmware 1.1.22+ |
| Mini Pit Lane Timer | Not supported |
All three products let you adjust how the screen renders, so glare and low light don't cost you a glance at your data.
Standard white-on-black display, the default for most conditions.
Flips to black-on-white, useful in bright, washed-out light.
A high-contrast outlined font, available on the full-size OLED Display and Lap Timer (not the Mini units), for maximum legibility in direct sun.
Every unit, side by side. Dashes mean the spec doesn't apply to that product, most often because a display-only unit has no GPS of its own to log or measure with.
| OLED Display | Mini OLED | Lap Timer S/R | Mini LapTimer | Pit Lane Timer S/R | Mini Pit Lane Timer | Secondary Pit Display | |
|---|---|---|---|---|---|---|---|
| Standalone GPS logger | — | — | Yes | Yes | Yes | Yes | — |
| Requires separate logger | HD2 / VVB Pro | HD2 / VVB Pro / HD Lite | — | — | — | — | Full-size Pit Lane Timer only |
| Update rate | Matches host logger | Matches host logger | 25 Hz | 10 Hz | 25 Hz | 10 Hz | Matches host Pit Lane Timer |
| Velocity accuracy | — | — | 0.1 km/h | 0.18 km/h | 0.1 km/h | 0.18 km/h | — |
| Position accuracy | — | — | 2 m (95% CEP) | 2.5 m (50% CEP) | 2 m (95% CEP) | 2.5 m (50% CEP) | — |
| IP rating | IP65 | IP65 | IP31 | IP65 | IP31 | IP65 | IP64 |
| Operating temp | -25 to +70°C | -25 to +70°C | 0 to 60°C | -20 to +70°C | 0 to 60°C | -20 to +70°C | -40 to +70°C |
| Power draw | <1.5 W | <1.5 W | <2 W | <1.5 W | <2 W | <1.5 W | <2 W |
| Input voltage | 7–30 V DC | 6–30 V DC | 7–30 V DC | 7–30 V DC | 7–30 V DC | 7–30 V DC | 6–30 V DC |
| Dimensions | 120 x 50 x 19.5 mm | 50 x 50 x 19.45 mm | 120 x 50 x 22 mm (S) 120 x 50 x 15 mm (R) | 50 x 50 x 26.7 mm | 120 x 50 x 22 mm (S) 120 x 50 x 15 mm (R) | 50 x 50 x 27 mm | 120 x 50 x 19.5 mm |
| Weight | 204 g | 156 g | 171 g (S) / 156 g (R) | 103 g | 171 g (S) / 156 g (R) | 103 g | 204 g |
| Lead length | 3.5 m | 3.6 m | — | — | — | — | 3.5 m |
| Delta-V LEDs | 2–6 | Yes | Up to 6 | Yes | Up to 6 | Yes | — |
| Logs to SD card | Via host HD2 | Via host HD2 | Yes | Yes | Yes | Yes | Via host timer |
| Outline font option | Yes | — | Yes | — | — | — | — |
| Price | $740.00 | $740.00 | $1,160.00 | $1,180.00 | $1,160.00 | $1,180.00 | $740.00 |
Specs sourced from Racelogic's published datasheets. A dash means the manufacturer doesn't publish that spec for this product, not that the value is zero.
Add the OLED Display (or Mini OLED for tight spaces) to see your HD2's data live instead of only after the session. You'll also need a CAN Splitter Cable if you're logging external CAN data at the same time.
The Lap Timer works entirely on its own. No HD2 required. Choose S for installation flexibility or R for a slightly slimmer, more permanent mount.
The Pit Lane Timer is solving a completely different problem: getting out of the box on time, every time, without a penalty. Add the Secondary OLED Pit Display if your crew needs to see the countdown too.
Many teams run a Lap Timer and a Pit Lane Timer together. They don't overlap in function, and each one earns its keep in a different part of the session.
We supply OLED Displays, Lap Timers, and Pit Lane Timers to IMSA and SRO teams every season, and we've fielded enough questions about the difference between them to know exactly where people get stuck. We stock inventory in the United States for fast delivery, and if you need something not listed here yet, like the Mini variants or the Secondary Pit Display, reach out and we'll get it sourced.
Delta-T is a time comparison: how far ahead or behind your reference lap you are right now, accumulated over the lap so far. Delta-V is a speed comparison: how your current speed compares to your fastest lap's speed at this exact same point on track. Delta-T tells you the story of the lap; Delta-V tells you what's happening this instant.
No. Both are standalone GPS data loggers with their own display built in. The OLED Display is the one that requires a separate logger, either an HD2 or Video VBOX Pro, since it has no GPS of its own.
No. The Secondary OLED Pit Display is a different product built specifically to mirror the Pit Lane Timer's countdown, and it only works with the full-size Pit Lane Timer, not the Mini version. A standard OLED Display can't be substituted.
Distance-based systems compare laps using how far you've traveled, which drifts every time your line, traffic, or a locked wheel changes that distance slightly. On a short track that drift is small. On a long circuit like the Nurburgring or Spa, small errors compound over more corners, so a GPS position-based system holds its accuracy where a distance-based one starts to lose it.
S has a side connector and suits installation flexibility or moving the unit between cars. R has a rear connector and a slightly slimmer profile, better for a permanent install. Mini is the smallest footprint of the three, built for single-seaters and cars with very limited mounting space, running at 10 Hz instead of 25 Hz.
Talk to our team about which combination fits your program, or shop the full lineup now with fast US shipping and genuine Racelogic support.
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