Yea, today I drove a 1996 1.8L NA. Not as well prepped as the 2000 I drove last time, but still a good Miata.
From the 1st run to the 5th run I gained 4.5 seconds. Still 2 seconds behind the owner of the car. I also got some data, the data is from my 3rd run. My best run was 47.428.