I've got the Koyo radiator and stock thermostat and if its real hot out, like 90+ deg F, I've seen my temps up to 205-215 deg F while sitting idling after some driving. Cruising around in hot temps, its normally around 195-205 deg F. On cooler days/nights around 60-70 deg F its more around 185-195 deg F.

 

Yes it is, which is why I can't understand why people buy aftermarket t-stats

My turbo is WATER cooled and my stock radiator / t-stat can handle it perfectly fine, even on those boggy 100F days.

 

Okay, so it looks like i'm doing alright.

I'm seeing 190-197 in stop & go or at idle and about 180-188 at speed.

 

^^Perfectly normal, expect to see 200-210 on very hot days at idle...still perfectly normal

 

I'm seeing ~170 on the EMS driving around town and I figured that was low and I have a problem with the sensor/sensor ground/etc.

 

My fans seem to kick on at 200º at idle..
Driving I'm 180º to 190º range usually. That is per my laptop read off my AEM EMS.

 

hmm, my fans are on all the time, ambient is around 80-90 here typoically, and i see
185ish in stop and go traffic and at stops.
181ish moving
192ish max raping the car at the dragon.

running water and water wetter stock radiator, stock thermo, and have big heat exchanger blocking the radiator