Re: Actual 147 0-60 times?
For 0-60 times a Sat-Nav GPS isn't really accurate enough.
Sat nav GPS systems are accurate for measuring a steadily held speed but have very poor quick response compared to accelerometer systems.
Most proper timing gear uses a combination of the two, although a pure accelerometer system would be adequate for a 0-60 time on a perfectly flat road, they get confused on hills (GPS+accellerometer would "correct" that).
For Joe Soaps like us though, our right foot is the biggest margin of error.
Getting efficient FWD launches is tricky.