On the track car, we are now running a custom under plate with a scoop/vent. This decreased on coolant temps 40 degrees.
We're not running a thermostat and we are seeing temps around 140F on the street, as soon as we go anywhere over 50mph, the temps stay there no matter how hard we push the car. On the track with the thermostat, I think we will stick around 220F.
We are pretty happy with the outcome.