Best Android app for recording speed/performance data?
 

In a few days I'm going to drive a race car really really fast. (The Rusty Wallace Racing Experience, I've done it before and it's a blast!) I'd like to record as much data as possible. I'll have multiple Android devices in my pockets to accomplish this redundantly. They are low-end devices though, with lame CPUs and little RAM.

What I need are suggestions for dependable, stable, efficient apps to record GPS and accelerometer data. I want to analyze my lap times, maximum speeds, average speeds, maximum G-force generated, etc.

So, who has experience with car performance and GPS tracking apps that might be good for me?