This is a partial brag because I spent all evening working on it, but also a revelation. Turns out my little 1.6 Miata is a whole lot better than I'd ever thought.
The PO did the timing belt, but apparently not well, because the intake cam (or exhaust, I forget) was off a whole tooth. Hours of reading and video tutorials later, and 5 hours of work later, crossed fingers....
I love it. 110% difference. It feels like it has twice the amount of power up to 4k. It pulls the same as it did in the high revs, but has the torque to actually get me up HILLS now! And kick the back end out, and rev instantly without lagging. It's like I got a free 100hp upgrade. Who knew.
I'm damned excited. I've been looking at other cars just because it's been SO slow. Looks like it was hiding its true self.
I give it two months before I want more power, though....