(Info taken from Plickbadger's original post on isi forum)
Please be aware that the default shifting option is H-Pattern with Clutch. If you don't have a clutch or an H-Pattern shifter, please choose the Paddle Shifter option in tuning.
If you choose the H-Pattern option, you will have to make good shifts
Be patient with your entry speed! This is the critical mistake that SM drivers make. You can carry tons of speed through turns, but you have to get the entry speed right. If you come in too hot, lift a little and preemptively counter steer.. you can save it to a point
I recommend the following FFB settings:
Car Specific FFB MULT = 1.24
FFB Smoothing = 4
Steering torque minimum="0.08000"
Car Specific FFB MULT = 1.00
FFB Smoothing = 0
Steering torque minimum="0.03000"
I recommend setting your engine volume to 35%. Spec Miatas are LOUD. Setting the this to 35% is effectively the same as wearing ear plugs, plus you'll be able to use TS or Vent and hear the spotter.