Where do you keep your coolant temp? Mine seems to run a bit cold im running a stock rad no thermostat with z06 fan's and a thermoswitch to control when fans come on and off.. im kinda near 160-170 i say that because my SM rds 12* colder than my Temp Gauge.. So my SM will read 155 and my temp gauge usually show 167+-.. Not sure if i should be running a little hotter around 180 ishhh anyone do some testing with the ethanol and coolant temps?