This is a great little camera if you wanr in car footage.
http://www.hobbytronics.co.uk/fly-cam-one
its designed for aircraft but works equally well inside a RC car.
It also has the added advantage of being switchable from a spare channel on the RX
Some amateur footage here (done by my son last winter in our clubs indoor series)
https://www.youtube.com/watch?v=S-1YwHe3ijw
The spur was almost damaged hence the noise (you might want to turn the volume down)