what is the Best gps for rc speed runs [in 2024]

Last Updated on March 3, 2024 by Jaxon Mike

RC cars have become an incredibly popular hobby over the years. From ready-to-run toy-grade cars to high-performance racing vehicles, RC cars provide hours of fun for hobbyists of all ages. One of the most exciting aspects of RC cars is pushing your vehicle to its limits and testing just how fast it can go. This is known as speed running – an area of the hobby focused specifically on achieving maximum speeds.

To get accurate and consistent speed measurements, many RC enthusiasts turn to GPS technology to track their vehicles. With a good GPS module properly installed in a car, you can get professional-level speed data to see just how fast your RC car can rip down a straightaway or around a large parking lot. When testing new upgrades to your vehicle or tuning your gearing and electronics for top speed, having trustworthy GPS speed logging is essential.

Why Accurate Speed Measurement Matters

When pushing RC cars to their limits, small differences in speed measurements can have a big impact. Is that new brushless motor hitting 58 mph or 62 mph? Did those new low-friction bearings eke out an extra 1 mph over your previous best? Without reliable speed data, it’s hard to make valid comparisons between setups.

Additionally, if you’re part of a community of speed runners who share and compare results, having accurate speed measurements is key. No one wants to falsely claim a world record based on inaccurate GPS readings!

So when equipping an RC speed run car, choose your GPS module wisely. In this guide, we’ll cover the key factors to consider and review some top GPS options on the market today. Let’s get started!

Key Considerations When Choosing a GPS Module

While virtually any GPS module can provide location coordinates and potentially speed data, not all GPS units are created equal. When sourcing a GPS for RC speed run use, keep these aspects in mind:

GPS Accuracy

One of the most important specifications of a GPS module is the accuracy it provides. There are a few key metrics that come into play:

• Resolution – This refers to the precision of measurements, typically expressed in units like millimeters. Higher resolution can provide more granular data.
• Sampling rate – The rate at which the GPS takes measurements per second. A higher sampling rate will produce more data points and can improve speed accuracy.
• Static accuracy – The accuracy when the GPS has an unobstructed view of the sky and is not moving.Ideal for providing an accuracy baseline.
• Dynamic accuracy – The accuracy when the GPS is moving and conditions are not ideal. Key for speed run use.
• Kalman filtering – An algorithm that uses statistical methods to improve accuracy by integrating other sensor data.

Higher priced GPS modules often advertise improved dynamic accuracy through techniques like Kalman filtering and sensor fusion. This can be worth the added cost if you want the most precise speed measurements possible.

Update Rate

The update rate determines how frequently the GPS module reports location and speed data back to a connected device like an RC car’s telemetry or data logger.

For speed run use, a faster update rate is critical to ensure you are capturing quick changes in velocity. Ideally you want a GPS updating 5-10 times per second or more.

However, faster update rates require more power. There is a trade off between update rate and battery life that must be balanced.

Ease of Installation

When installing a GPS module in an RC car, you’ll need to consider the wiring and placement to integrate it with your vehicle electronics.

Look for GPS units that have simple connectivity options like UART serial output or I2C which are commonly used in RC electronics. The GPS may need to tap into a regulated power source like a BEC circuit to obtain ideal voltage.

Physically mounting the module is also important. You’ll want to position it with a clear view of the sky away from sources of interference. Some racers will mount the GPS module on a mast attached the car’s rear wing to elevate it and improve reception.

Following the GPS manufacturer’s installation instructions is highly recommended to ensure proper integration with your RC car’s systems.

Additional Sensors

Many advanced GPS modules include additional sensors beyond just the GPS chip itself:

• Accelerometers measure acceleration forces in 3 axes. This can help refine speed estimates.
• Gyroscopes measure orientation and rotation rates. This aids in tracking turns.
• Magnetometers provide directional info to assist GPS heading.
• Barometers measure air pressure changes that correlate with altitude differences.

Using sensor fusion and Kalman filtering, data from these secondary sensors can augment the GPS and improve dynamic speed accuracy. Having an integrated module with multiple sensors can be beneficial over just using a lone GPS chip.

Telemetry and Data Logging

To make the most of a GPS module, you’ll want the ability to view real-time telemetry data as well as record logs for later analysis.

Quality GPS units will have interfaces like UART serial, I2C or SPI to connect to optional displays, radios and data loggers. This allows you to observe your RC car’s speed, heading and location while operating it.

Data logging lets you capture time-stamped logs that can be reviewed after a run on a computer. You can analyze peak speeds, acceleration rates, total distance traveled and more.

Look for GPS modules that support integration with various telemetry radios and data loggers to get the flexibility you need.

Pricing

There is quite a range when it comes to pricing for GPS modules suitable for RC speed run use. Simple single-chip GPS receivers can be found for $10-$20. Full-featured GPS/INS units with additional sensors can cost $200+.

In general, you get what you pay for – more expensive GPS modules tend to offer better accuracy and more capability.

Define your budget and look for the best GPS you can afford. The extra cost of a premium GPS over a basic model may be worth it if you truly want the most precise speed measurements.

Reviews of Top GPS Modules for RC Speed Runs

Here are some of the most common and well-regarded GPS modules used by the RC speed run community.

1. Ublox NEO-M8N

One of the most popular GPS modules used by RC hobbyists is the Ublox NEO-M8N.

Pros:

• Good accuracy and performance for the price
• 5Hz update suitable for speed runs
• Widely compatible interfaces

Cons:

• Lacks additional integrated sensors
• Lower precision than some alternatives

Key specs:

• Update rate: 5Hz
• Position accuracy: 1.5m CEP
• Velocity accuracy: 0.05m/s
• Interfaces: UART, SPI, I2C

It’s a high quality GPS chipset known for its good accuracy and integration support. The NEO-M8N provides 5Hz updates suitable for speed runs. It can interface with telemetry radios and data loggers.

With a price around $40, the NEO-M8N offers good bang for your buck. It lacks additional sensors but overall is a great mid-range GPS option.

2. VK-172 G-Mouse

If you want an integrated GPS/INS solution, the VK-172 G-Mouse is a top choice.

Pros:

• Excellent dynamic accuracy
• Sensor fusion improves precision
• Fast update rates up to 20Hz

Cons:

• Expensive compared to simpler options

It includes:

• GPS chipset
• 3-axis gyroscope
• 3-axis accelerometer
• Kalman filtering for sensor fusion

This combines GPS data with input from the motion sensors to deliver excellent dynamic speed accuracy. Update rates up to 20Hz are possible.

The G-Mouse retails for about $170. That higher price gets you tremendous precision perfect for RC speed runs.

3. BN-880 GPS Module

Pros:

• Very affordable price
• Good 10Hz update rate

Cons:

• Mediocre accuracy
• Basic entry-level module

On a budget? The BN-880 GPS module can be found for under $20. Key details:

• 66 channel GPS chipset
• 10Hz update rate
• UART interface
• Compact design

While not as advanced as other options, the BN-880 provides good fundamental performance for an unbeatable price. It’s a great entry-level GPS speedometer. Just don’t expect the highest precision.

4. Raspberry Pi High Quality GPS

Pros:

• Fully customizable with Raspberry Pi
• Can add high accuracy GPS module
• Flexible programming options

Cons:

• Requires DIY assembly and coding
• Most expensive option

For the ultimate in customization, you can create a GPS speed unit from a Raspberry Pi and add-on GPS module.

The Pi gives you a flexible programmable platform. You can craft custom firmware with expanded capabilities.

Partner it with a high quality GPS hat like the Adafruit Ultimate GPS for great results. Expect to spend $100+ going this route.

5. SPI GPS HAT Module

Pros:

• Purpose-built for Raspberry Pi
• Fast SPI interface
• Integrated antenna

Cons:

• Requires Raspberry Pi and coding
• Less configurable than other options

This ready-made SPI interface GPS board is designed to stack onto a Raspberry Pi, leveraging the Pi’s computing power.

It uses the fast SPI bus for up to 10Hz updates. The onboard antenna provides good reception.

For around $60, it’s a convenient building block for a Pi-based GPS data logger or telemetry system.

FAQs

What update rate do I need for RC speed runs?

For accurate speed measurements during RC speed runs, you’ll want a GPS module with an update rate of at least 5Hz, with 10Hz or faster being ideal. This ensures you capture rapid changes in speed.

What connectivity options work best for integrating a GPS in an RC car?

Look for GPS modules with UART serial, I2C or SPI interfaces as these are commonly used for telemetry and data logging in RC applications. Avoid units that only output to USB.

Can I use a GPS app on my phone instead of a dedicated GPS module?

Most smartphones lack the update rate, connectivity options, and robust packaging required for RC speed run use. A purpose-built GPS module will provide far better results.

How do I mount the GPS receiver on my vehicle?

Mount the module with a clear view of the sky on an elevated mast or surface to reduce interference. Follow manufacturer guidelines to ensure proper antenna orientation.

What software can I use to analyze GPS data logs?

Popular RC telemetry software like Telemetry Viewer, Log Viewer, and Dashware all support importing and graphing GPS data for performance analysis.

Conclusion and Recommendations

Installing quality GPS technology in your RC speed run vehicle provides essential acceleration and peak speed data to quantify your car’s performance.

Choosing a GPS module with good dynamic accuracy and a fast update rate is key. Additional integrated sensors like gyroscopes and accelerometers can further improve precision through sensor fusion algorithms.

Look for GPS units that easily interface with RC car systems and support real-time telemetry and data logging. These capabilities allow you to monitor speed during runs and analyze results after.

Higher priced GPS options generally offer better speed measurement capabilities. But even budget modules can be suitable if extreme precision is not required.

Based on the factors explored in this guide, the Ublox NEO-M8N and VK-172 G-Mouse stand out as great choices for RC speed runners looking for reliable performance without breaking the bank.