E46 M3 vs 370z BAttle on a racetrack
 

YouTube - E46 M3 vs 370z - Snetterton

Did the Z go into limp mode at the end?

Limp Mode is a Possibility at the end, and it did very well...until it pulled over

I watched without sound (at work) I was thinking the 370z pulled over to follow the m3 drivers lines (thinking the m3 driver knew the track better/more familiar with car and the 370z guy was just getting used to things)

was that track abnormally bumpy?

no it just seemed as if the camrea was mounted on something stiff so that it vibrated with acceleration. Anyways to me it looked like the 370z was pulling away from the m3 on the straight-aways.

Driver > Car, at least in any session but group A. This group is not an A group. A fast driver in a Miata would have wiped the floor with both of them.