That's honestly how I came across it. A YouTuber was using it in parallel during his 1/4 run and I was impressed how accurate it was given the price point.
Correct - any good unit that receives high-resolution GPS signals (i.e., 10Hz or better),
should be able to provide very accurate data. The difference then becomes the UX/UI, and features available from the hardware and/or software, i.e. rolling start capability, selectable start/end points, battery life, external antenna capability, etc.
That's great to know as well. Again a more applicable case where I would want to use it and not have to hit 130mph every single time to get some sort of metric like the Dragy.
Exactly. We want more of a true datalogging solution, that also shows some commonly desired metrics like 0-60, 0-100, 1/4 mile, etc. The AX-22 software is
not user friendly but it has all data in 100Hz (0.01-second) increments.
As a side note: When measuring performance, I've found that low-speed measurements such as 0-60 are not particularly useful. There is far too much variability at the launch, based on traction on public roads with street tire compounds. Wheelspin can cause times to be several tenths of a second slower, and can be as much as 1-2 seconds with severe spin and ASR/ESP intervention. Best case, spend some time at a dragstrip with a sticky surface and (if possible) drag radials where there will be zero wheelspin. This will give you the best numbers, for given atmospheric conditions, which can vary substantially day to day. It also will show the peak G forces at launch which is cool to see on cars that launch hard.
For street testing, data to 100, 130, or higher is more indicative of true performance as it minimizes the effect of wheelspin at the start. Or better yet, compare data from 20-100, 30-100, 30-130, between vehicles. That should eliminate the launch-wheelspin variance. For each test date/vehicle combination, also note the fuel load, weather conditions (temp and barometric pressure are the main variables), and vehicle setup - tires, anything that isn't stock which may add or remove weight, etc etc. A near-empty fuel tank will be ~20 gallons lighter vs full tank on a 500E, which translates into nearly a 150-pound difference.
