So in a nutshell for those that only speak English, it basically boils down to this...If you want to lower your operating temp, you need to do much more than just replace your thermo. If you are going with a 160F thermo, you need to lower your ambiance temperature in your engine bay to make the setup efficient, otherwise the thermo will be opening up just to let in coolant that has not had the chance to cool yet.
So things like cutting the vent on your CF hood, lowering the cooling fan turn on/off temps, or coolant additives such as water wetter, etc... can improve ambiance temp. That way you have a happy fan, happy t-stat, happy coolant, and as a result, a happy engine.
Capiche?
