For automotive enthusiasts and performance drivers, achieving precise lap times is paramount. Whether you’re tracking your progress on the circuit or analyzing road performance, accurate GPS data is the backbone of any reliable lap timing application. While many modern vehicles are equipped with On-Board Diagnostics II (OBD2) systems that offer a wealth of data, the question of Gps Obd2 Compatibility and its effectiveness for lap timing arises. This article delves into the nuances of GPS technology in automotive contexts, exploring why, for optimal lap timing accuracy, external GPS devices often surpass the capabilities of standard OBD2 GPS integrations. We will guide you through the best external GPS solutions that seamlessly integrate with leading lap timer applications, ensuring you capture every millisecond on the track.
The Role of GPS in Lap Timing: Precision is Key
Global Positioning System (GPS) technology is fundamental to lap timing. It allows applications to pinpoint your vehicle’s location with each passing moment, mapping your trajectory around a track and calculating lap times with precision. The accuracy of your GPS data directly impacts the reliability of your lap times and performance analysis.
Smartphones and some in-car systems come with internal GPS sensors. While convenient, these internal GPS receivers often have limitations in accuracy and update frequency, especially in demanding motorsport environments. Factors like satellite visibility, signal interference, and the quality of the GPS chip itself can affect performance. For casual use, a smartphone’s GPS might suffice, but for serious lap timing and data analysis, a more robust solution is typically required.
Understanding GPS OBD2 Compatibility: Data Access and Limitations
OBD2 ports are standard in modern vehicles, primarily designed to access engine and vehicle diagnostics data. Some OBD2 devices and adapters boast GPS OBD2 compatibility, suggesting they can provide GPS data alongside engine metrics. However, it’s crucial to understand the limitations of relying solely on OBD2 for GPS information when it comes to precise lap timing.
While an OBD2 scanner can indeed provide GPS coordinates, it’s often not the primary function. OBD2 systems are focused on vehicle diagnostics and emissions, and any GPS functionality is usually secondary. This can translate to:
- Lower Update Rates: OBD2 GPS data might not be updated as frequently as dedicated GPS receivers. Lap timing applications benefit from high update rates (10Hz, 20Hz, or even 25Hz) to capture every nuance of track driving. OBD2 GPS might offer lower frequencies, leading to less granular and potentially less accurate lap time calculations.
- Positioning Accuracy Concerns: The GPS chips integrated into some OBD2 devices may not be of the same high-accuracy caliber as those found in dedicated external GPS receivers designed for precision sports and automotive applications.
- Data Focus: OBD2’s strength lies in vehicle diagnostics – engine speed, throttle position, temperature, etc. GPS is an add-on feature in some cases, not the core offering.
For drivers primarily interested in comprehensive vehicle data alongside basic location tracking, GPS OBD2 compatibility might seem appealing. However, for those prioritizing highly accurate and reliable lap times, especially in performance driving scenarios, external GPS solutions are generally the superior choice.
Why Choose External GPS for LapTimer Applications?
External GPS receivers are engineered specifically for high-precision location tracking. They offer significant advantages over relying on internal smartphone GPS or basic GPS OBD2 compatibility for lap timing:
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Superior Accuracy: External GPS devices, especially those designed for motorsport, utilize high-sensitivity GPS chips and often incorporate GNSS (Global Navigation Satellite System) support, including GPS and GLONASS (Russian system). This dual-system approach significantly increases the number of satellites the device can connect to, resulting in enhanced accuracy and lock stability, even in challenging conditions like tree cover or urban canyons.
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High Update Rates: Many external GPS receivers for lap timing offer update rates of 10Hz, 20Hz, or 25Hz. This means they report your vehicle’s position 10, 20, or 25 times every second, providing incredibly detailed and smooth track data. Higher update rates are crucial for accurately capturing braking points, cornering lines, and acceleration zones, leading to more precise lap time measurements and insightful performance analysis.
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MFi Certification for iOS: For Apple device users, MFi (Made for iPhone/iPad/iPod) certification is a critical factor. Many high-quality external GPS receivers are MFi certified, ensuring seamless and reliable connectivity with iOS devices. MFi certification guarantees compatibility and optimal data transfer.
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Direct Integration with Lap Timer Apps: Leading lap timer applications, like Harry’s LapTimer, are designed to directly integrate with external GPS receivers. This direct integration often unlocks advanced features and ensures optimal data flow compared to relying on the iOS Location Service, which can sometimes limit update rates and data fidelity.
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Robust and Reliable Connection: External GPS receivers often connect via Bluetooth Low Energy (BLE), offering a stable and energy-efficient wireless connection to your smartphone or tablet. Some legacy options even offer wired connections for ultimate reliability.
In summary, while GPS OBD2 compatibility might offer a combined data solution, external GPS receivers are purpose-built for high-accuracy location tracking, making them the ideal choice for serious lap timing and performance analysis with applications like Harry’s LapTimer.
Top External GPS Devices Compatible with LapTimer
For users of Harry’s LapTimer and similar applications seeking the best possible GPS accuracy, several external GPS devices stand out. These devices are designed to deliver superior performance compared to internal smartphone GPS or basic GPS OBD2 compatibility solutions. Here’s a review of recommended devices, categorized for clarity:
Current Recommendations:
1. Dual XGPS 160 (Sky Pro)
The Dual XGPS 160 is a robust and reliable workhorse for lap timing. It operates at a 10Hz update rate and leverages both GPS and GLONASS systems for enhanced accuracy and satellite lock. Its ability to connect to multiple devices simultaneously is a valuable feature for users with multiple smartphones or tablets. Harry’s LapTimer is fully integrated with all of the XGPS 160’s functionalities.
2. Racebox Mini
The Racebox Mini stands out with an impressive 25Hz GNSS sensor, providing an exceptionally high update rate for incredibly detailed track data. It connects via Bluetooth Low Energy and boasts a strong signal. It’s crucial to be mindful of its “always-on” nature and strong signal to prevent unintended connections from other nearby devices. Racebox Mini requires LapTimer v24.6.2 or later.
3. Racelogic VBOX Sport (2nd gen)
The second-generation VBOX Sport from Racelogic utilizes both GPS and GLONASS for improved accuracy and lock stability compared to its first-generation predecessor. While it operates at a 10Hz update rate, Racelogic’s expertise in track data recording equipment ensures high-quality data and performance. For users seeking a balance of performance and brand reputation, the VBOX Sport is a strong contender.
4. Columbus P-9 Race
The Columbus P-9 Race GNSS sensor is designed for permanent in-car installation. It features wired powering, an external antenna for optimal signal reception, and supports all GNSS systems. With a 25Hz update rate, it’s well-suited for track use. Its external antenna and comprehensive GNSS support promise excellent accuracy.
5. Qstarz BL-818GT / BL-1000GT
Qstarz offers the BL-818GT and BL-1000GT as compatible options for LapTimer on iOS. Both feature a 10Hz update rate and utilize Bluetooth Low Energy. The BL-1000GT adds data logging to an SD card as a parallel feature. While perhaps not as widely recognized in the Apple ecosystem, Qstarz provides viable 10Hz GPS solutions.
Compatibility for Consideration (Lower Update Rate):
6. Qstarz BL-1000ST
The Qstarz BL-1000ST is a more basic Bluetooth Low Energy GPS/GLONASS receiver with a 1Hz update rate. While not ideal for demanding track use due to the lower frequency, it still offers significantly better accuracy than a smartphone’s internal GPS. It serves as a functional, albeit less optimal, option if you already own one. Ensure it’s set to its maximum 1Hz output.
Legacy Options (Still Supported by LapTimer):
7. Racelogic VBOX Sport (1st gen)
The first generation VBOX Sport was a high-performance GPS, delivering data at a 20Hz rate. It uses GPS only but provides corrected data even at this high frequency. Racelogic’s expertise is evident in this device. An external antenna is highly recommended for optimal performance. Note: 20Hz support is exclusive to LapTimer GrandPrix.
8. Bad Elf GPS Plug-in (Lightning Connector)
The Bad Elf GPS for Lightning Connector is unique with its direct Lightning connection, offering a reliable wired link to iOS devices. It operates at 10Hz and utilizes both GPS and GLONASS. This wired connection eliminates potential wireless connectivity issues. LapTimer is fully integrated with its features. LapTimer is also compatible with other Bad Elf GPS Pro models.
9. APEX Pro
The APEX Pro is more than just a GPS device; it’s a driving performance improvement tool with LED feedback. It integrates a 10Hz GNSS receiver. LapTimer offers full integration, including automatic calibration, allowing use without the APEX Pro app running in the background.
10. Dual XGPS 150A
The Dual XGPS 150A is the predecessor to the XGPS 160. It offers 4 or 5Hz GPS (no GLONASS) and connects to one device at a time. It’s a cost-effective option for users seeking reliable external GPS at a lower price point. Ensure the firmware is updated for 4 or 5Hz operation.
11. Emprum Ultimate GPS (30-pin Connector)
The Emprum Ultimate GPS is a 5Hz GPS device that plugs into older 30-pin Apple connectors. While adapters exist for Lightning devices, its plug-in design can be somewhat fragile for vehicle use. It’s powered directly by the iPhone.
Specialized and Custom Options:
12. Pozyx Indoor Positioning
Pozyx is an indoor positioning system integrated with Harry’s LapTimer, designed for environments where GPS signals are unavailable, such as indoor karting tracks. It uses anchors placed around the track to triangulate tags in vehicles, providing highly accurate local positioning.
Devices Using iOS Location Service (Less Recommended for Direct Integration):
Devices not listed above, even if MFi certified, may not be directly integrated into LapTimer and are generally less recommended for optimal performance. These devices typically rely on iOS’s Location Service, which can limit update rates and data access. Examples include Garmin Glo 2 and GNS devices.
Developer Program Integrations:
LapTimer’s developer program allows third-party sensor integration. Examples include ReDrive BLE (20Hz GPS) and RaceHF (high update rate GNSS sensor), integrated by external developers. Support for these devices is typically provided by the respective manufacturers or integrators.
Legacy GPS Options:
LapTimer maintains support for very old GPS devices like PosiMotion’s G-Fi and TomTom’s first-generation car kit (both 1Hz). Additionally, any GPS device outputting NMEA streams via Wi-Fi can be connected, including some marine devices.
Jailbroken iPhones (Not Recommended):
While jailbreaking iPhones allows connection to non-MFi NMEA GPS devices via software like roqyBT and BTstack GPS, this configuration is not officially supported and discouraged due to potential instability and security risks.
Conclusion: Optimizing Lap Timing with the Right GPS Solution
For achieving the highest levels of accuracy and reliability in lap timing, especially with applications like Harry’s LapTimer, choosing the right GPS solution is critical. While GPS OBD2 compatibility might offer basic location data and vehicle diagnostics in one package, it often falls short in delivering the precision and update rates required for serious performance tracking.
Investing in a dedicated external GPS receiver, particularly one from the recommended list above, will significantly enhance your lap timing experience. These devices are engineered for accuracy, offer high update rates, and ensure seamless integration with lap timer applications, providing you with the detailed and reliable data you need to analyze your performance and shave off those crucial seconds on the track. Whether you prioritize ultra-high update rates, robust reliability, or a balance of performance and value, there’s an external GPS solution perfectly suited to elevate your lap timing endeavors beyond the limitations of basic GPS OBD2 compatibility.
