I'm not sure I can offer much help John. The ducted fan cools my installation on the ground so I can run it indefinitely. I know if I take the fanduct off, it will eventually overheat just idling on the ground.

I think I saw on your website you have a cooling fan installed on your rad? That should help.

On my first flight the coolant temp was not a problem (never has been) but oil temp went to 240. I stayed in the pattern (I was planning to go high and feel things out) but I had to go around twice and didn't get it down until the 3rd approach. Best advise I can offer is "fly the plane" (origin Burt Rutan: don't get distracted by some anomaly and forget to fly the airplane).