A few weeks ago I went to a PCA autocross at pocono. For those that are into autocross, I would highly recommend going if they do it again. It was the first "autocross" I ever thought I was going to top out third gear. My friend was doing 89mph accoring to his GPS. And we got like 12 runs.
That being said, the miata doesn't make enough power for courses like this and I got beat by a few cars that I would expect to beat. I was full throttle from the first turn all the way to the other end of the back stretch. My fastest a 53.3 and I think the fastest was a 51.2.
I actually remembered my Gopro so here are some videos.
Ends with a Spin
https://youtu.be/IU2lcg5AUC0
Fastest
https://www.youtube.com/edit?o=U&video_id=aetnwJsJraQ
I also started to fiddle around with the NB engine (meaning I put it on the stand), and the megasquirt (I downloaded tuner studio)