Well some engine's run cooler then others. Now I have never come across a engine that has run below 200 degrees. But if your enigne likes to run cooler then others then thats that and you cant really do much about it. But I alwasy say not to tune for temps but 200 is extremel low but if thats what your engine's sweet spot is then thats where it is. Thats about the only real further advice that I can give you at this point.