Looking for some advice.... The car does not like to start when hot (over 200 degrees). Normal? What's the problem? Do I need an elec fan?

The car has a Ron Davis radiator (distilled water and water wetter), ducted creatively, splitter, dual pulleys, 160 degree thermostat. It doesn't get over 210 when racing (and that's a 90 degree + day) no problems there. Normally it runs around 200. No problem on cool down lap either.

Temps will climb quick sitting on grid (I try and keep the motor off usually), sitting off course waiting for a tow or in the pits after a race (I pop the hood to stop that).

For example, I ended up in a gravel trap and needed a tow, I killed the power but temps still rose to 230 and then it wouldn't start after getting pulled out until it cooled back down. I have been on grid idling thinking we are about ready and then a delay happens so I cut the motor and temps sit high and then I can't restart.

The motor has less than 20 hours on it. How can I make sure it starts when hot?