I'm going to attest to this t-stat also. My car will not go over 190* w/ac on in stop and go traffic in SW Fl dead of summer. I have also revised my fan settings, and am running approx 80/20% water/coolant.
I think stock is 195Stock t-stat. I set the low speed for around 186. don't remember the exact #. What is the average opening temp of the stock t-stat?
I think the hi speed fan runs when the car is warmed up and A/C is on MAX anyway though.
:beer:
NOPE you didn't factor in the Stat itself, it takes very high temps for the oem to fully open that is the main reason Joel's performs, a modified spring is used.So I would think that the Reische t-stat will allow the engine to run cooler ONLY IF the radiator and fan system can remove the heat.