I added adjustable FP and went to the dyno to get it tuned. The dyno shop had done Miatas before but not SMs with a restrictor plate. The tuning was done on a Mustang dyno.
We got pretty decent power out of it if it converts the way I think it does to Dynojet numbers but couldn't make much of the AFR. The last trace was where we settled after monkeying a bit with timing and FP. The numbers I'm seeing others toss about don't seem to fit with what I got. He thought it looked too lean under 4k rpm and we never did get the high rpm close to where we thought they should be. He thought maybe it had a rising rate FP regulator. There is also a possibility the prior owner put in a different fuel pump. The filter was awfully clean when I looked at it a few months ago.
Any thoughts on this?
(edit: Middle AFR trace is where I started. Top is where I finished)