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[Andy@Ross-Tech.com]

Not only are the trap speeds way off with G-Tech's formulas, but the company outright lies about the cause of that innacuracy:

Quote:

Why is my G-TECH/Pro consistently 2-3 mph above the track?

G-TECH/Pro is a very accurate machine, and the trap speed result that you get from the G-TECH/Pro is actually more accurate than the racetrack. Reason is that the racetrack averages your speed over a 60 feet stretch between two beams and G-TECH/Pro measures your speed at the exact 1/4 mile point.

Even with a 95 mph trap speed where I stayed on it til 100+ mph, the 60-ft beam only saw about a 1.2 mph change in my speed. Also, if G-Tech knows this, why don't they just average their speed between 1260 ft and 1320 ft? It should be simple enough to do by changing their integration method.

I've used G-Tech's and AP-22's in other vehicles and found them to be little more than toys. Logging average rear-wheel speeds using the car's ABS sensors has proved to be EXTREMELY accurate (with 0.05 seconds AND within 0.1 mph) when used at the dragstrip.