I'm looking to upgrade from my Garmin GLO GPS (it seems my data isn't as smooth/accurate as it used to be).
My primary concern is data accuracy, which makes me lean towards the RaceBox Mini since it apparently has 25Hz GPS. I also noticed it has a built-in accelerometer, which can help justify the higher price.
Is the built-in accelerometer on the RaceBox Mini any good and/or should it be better than the internal accelerometer on my phone? (Galaxy S22)
Is the 25Hz GPS as accurate as it sounds?
Otherwise, what's the next best option for GPS?
Side note, I thought I saw one of TImurr's posts where he pulled in pretty accurate accelerometer data from the canbus. I'm also considering the OBDLink MX+, which I believe can get canbus data, which would give me another option for accelerometer data.
The car's onboard IMU is likely already placed in a more appropriate spot.
I did a side-by-side comparison of acceleration data from RaceBox Mini GPS (calculated by RaceChrono), the RaceBox Mini's IMU, and my car's onboard IMU (Toyota GR86).
Both IMUs were equally noisy (or are those the suspension oscillations?!).
With some squint-based filtering, the data from the car's onboard IMU aligned well with the acceleration data calculated from GPS data.
Whereas the longitudinal acceleration of the RaceBox Mini's IMU was significantly off both.
I did a manual 5 point rolling average filter in Excel to the X acceleration data (from internal sensor) to reduce noise.
From the 7.6sec 1/4 mile car :