I help build and crew on 2 different cars, an outlaw dirt modified and a winged 360 sprint car. Has this system been used on any 1/4 mile or 1/2 mile circle tracks. How accurate would the system be without the use of a "high quality" GPS signal? We would only be able to use the phone's internal GPS. What is required to add the tracks we race at?
Thanks you for the info.