Running without a thermostat ok?

I drove the car on Saturday and saw the highest temps yet. I have been able to keep it at 190 with the fan on but not that day. Was nearly 100 degrees out, had about a 30 mph tail wind driving home 45-55 mph (2000-3000 rpm). She hit 220 and I pulled it over. Sat for 3 or 4 minutes with the water pump and fan going, got the temp to 180 and drove on again. Got to 220 again by the time I got home. I don't know if it would have gone any higher than 220, but I didn't want to let it. I imagine if I were driving into the wind it would have helped since it seems there is also an air flow issue I dealing with. But I defintely think an air dam plus some working on a restrictor plate would fix any further temp issues. I also can still switch the fan over to the high setting. Right now just using the low setting.