"When compared to an NHRA approved track your time will depend whether you stage "shallow" or "deep." G-TECH/Pro has a default 12" rollout which is equivalent to "Shallow staging."
This level of accuracy is achieved thanks to 10 years of experience and research resulting in many technological achievements including a precision three-axis accelerometer system with full temperature compensation.
We are particularly proud of our ability to gather RPM data right through the cigarette lighter which allows us to have Torque measurements along with Sequential Shift lights and RPM replays. We are the first in the world to do this."
It is accurate to within .01 of a second. I confirmed this on the dragstrip with the Titan. It will read your trap speed a bit high though, since it doesn't measure your trap speed the same as the dragstrip. The E.T. is right on though. HP and torque reads a little low since it measures net hp/torque at the wheels, with the wind resistance. I was impressed with it, yes it is worth it, though there are some other choices out there. The G-Tech is very easy to calibrate in Titan's, and probably all nissans in general.