It seems someone is trying to put together their own data acquisition system check it out

http://www.justracing.com/raci...p?t=8

Would be cool if it actually works.

 

To answer your question about g-sensors on the control arms...It would be easiest to mount it directly to the upright, you are interested in the acceleration of the tire, not the control arm (more potential for error in tire g forces). Many teams use a combination of acceleration sensors (z-axis only is fine) on uprights in conjunction with linear position sensors at the shocks, which allows the shock velocity to be integrated and differentiated from two sources. The problem is that it can be frustrating to try converge data from two separate types of sensors.

You need at least a 10 g sensor, and you can use filtration to remove some of the noise that you will get. Also, the resolution of a sensor will depend on the sampling rate (dependent on your speed), so when the original poster claims the g-sensor has a higher resolution than a pot, I have to dissagree.