ive got a $500 set of twin thermos ordered through an auto elec i know, i also have a 65mm alloy radiator, this combo seems to go well my gauge is in fahrenheit but thermos come on at about 185 which i think is 85 degrees and keeps the car around that temp shutting off whenever required, i have driven her as hard as i like on 40 degree days with no over heating, i like the look of a clutch fan though, having said that my panelvan has a clutch fan and that overheated in the city i didnt have an overflow bottle hooked up at the time which didnt help