LS engines run hot for emissions and crank case moisture burn off. I would get the fans to come on sooner. Sitting in traffic,w AC on and low flow you should keep it around 210. T stat temp is fine, you just need to get the fan cycles down. Fan 1? I assume you have 2 fans. Set it up so AC sense will run both fans.
As far as cap pressure , I would go with what the radiator manufacture recommends. Most I have seen are 16 lbs.
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