I"m considering getting the following:
http://www.nology.com/laptopdyno.html

I was wondering if any of you have used this product, and could provide any advice on it?

I also need to know the following information for it, and I'm unsure where to find it:

Weight – weight of the vehicle including passengers.
Gear Ratio – the overall gear ratio of the vehicle, which includes transmission and axle.
Tire Diameter – the vehicle tire diameter.
Pressure– current altimeter pressure available here.
Drag – drag coefficient of vehicle here.
Frontal Area – frontal area of vehicle here.

I have an 04 accord v6 coupe with auto tranny.

Thanks for the help.