I would go to a 4-core and try to run it cooler. I have read that if you want to run 190 you need to be using a 190 thermostat, or 180 what ever temp you would prefer. How's you mixture of anti-freeze to water. Make sure it's at least 50/50 water is what takes you heat out of your engine. I lived in Vegas and was running my car with to much anti-freeze, I was over heating as soon as I changed to a 60 water 40 anti-freeze my car was running cooler. 210 is too hot, plus the air your pulling into your engine is not giving you the performance you could get if it was cooler under your hood.