Engine temperarture pass 180 F problem solved

[j.fro]

I use the app Dash Command pretty often to see what's going on with water temps and a few other things. For both my 986 and 996, the line at 180 is 180 degrees; straight up is around 200, and the right edge of the "0" is 220. I'll get the right edge/220 on a hot day in traffic, and as soon as I'm moving 35+ for a bit, the temp drops back down to 190-200.
Both cars have the 160 T-stat, new water pumps, and the larger water/oil cooler. 986 has a center radiator, 996 does not.