Originally posted by JonHsiung
GTech - It uses the g-force exerted by your vehicle accelerating and a sensor in it to measure what your quarter mile time is and everything. It then calculates everything with your inputted weight, etc of your vehicle and data that you give it to give you your estimated 1/4 mile track time, horsepower, or however many g's you were pulling on your skidpad.
It's usually within 0.2 seconds of your 1/4 mile time and 10 hp from what I've observed from cars that dyno or track after they test it out.
.2 seconds faster or slower in the 1320?