FYI, my 514 runs pretty steady at 180 on the highway. I will creep higher when run hard and in traffic.
I think the gauge is pretty accurate. I had had
oil problems with a prior engine and the gauge had no qualms about hitting 230. I have done nothing special. Large diameter fan, aluminum radiator, coolant, 180 thermo. I try to run some mystery
oil with the gas to keep it lubed better.