What's too hot?

It's cooled down in SoCal and I am still running up to 212 degrees in traffic. Here's the scenario:
New 2 row copper radiator 28inch wide x 19 tall
2 new hayden fans...no shroud
160 deg stat
I tried no stat with just a restrictor and same results.

When the car is cruising faster than 50 MPH it stays cool. Stop and go is the problem.

Any ideas besides going to an alunimum set up with shrouds. Can I make this set up work?

Will a 190 deg stat help?

The motor is brand new and tuned by a good performance shop. The odd thing is that it ran cool for the first 500 miles.

If you have a "built" motor rather than stock I would definitely step up to a 3 or 4 roll radiator. Temperature of 212 is still in the OK area but I would shoot to stay under 200 in the same conditions.