Wierd Cooling Issues- never seen this before- help?

[D.Hearne]

210 isn't that hot, but the O.E. radiators weren't good pieces to start with. Neither were the fans. Water absorbs heat better due to the surface tension difference. Water-Wetter thins this and thus helps this. But it also will find leakey joints faster too.

 

[GNN60GT500]

All right, I flushed the radiator again, added 50/50 mix (with bottled water), water wetter- and went to a higher pressure cap- (running 14lbs now)

Here are the constants- things I did not change

Car has a shroud, fan half way in
180 thermostat
timing set at 12 degrees
long tube headers with MagnaFlow mufflers-
3 row radiator (found receipt)

The result is a 10 degree drop in temperature-

I can live with 200- Id perfer 180-190 but I can live with 200-

Thanks for your help guys- this place rocks-