i was reading about these and they look pretty cool.... how would they measure horsepower though? some sort of calculation based on the weight of the car and your acceleration, etc? arent there way too many factors to take into account for an accelerometer-type device to accurately estimate horsepower?

pretyt much like the g-tech, only based on a gauge/cup style. I have an extra slot I was thinking of adding one of these for the heck of it. They are fairly accurate if you have the correct weight etc. It is not gonna igve u the exact time, but will give you an idea, i think i heard normally within about .1 second maybe .2 its pretty accurate.



http://www.aplusperformance.com
http://www.modified-motorsports.com