using the time and acceleration measurements to derive distance travelled and velocity. So your "trap speed" is the speed at the end of the 1320 with the G-Tech. But at the drag strip your trap speed is an average of your speed over the last 60ft. Those numbers *should* be different. (I'm assuming we're talking about the old G-tech, which I have. If the new one compensates and mimicks by taking a similar average, I was unaware).
Z-Jay Vice President - Edmonton Z Car Club 93 300ZX TT - Stage VI