Question: Why are so many people so set on changing to the 180 degree thermostat??
(--please understand, actual factual true racing applications excluded--)
I guess here are my main points for leaving it at 195:
1. The cooling system pressure will not be any less, that being determined by the pressure cap.
2. The whole darn computerized system (-actually multiple systems-) is designed for use with the 195. That is what the system is expecting to see, and I'd darn sure be very careful about messing with anything that is likely to aggravate the computer.
3. Running a 180 absolutely WILL NOT make your engine run cooler in a hot climate, or on a hot day. Remember, once the thermostatic controlled temperature is reached, and the 'stat is open, then it is "out of the picture." The max engine temperature attained then is dependent on many other cooling system factors, most of them related to the ability to dissipate heat. NOT THE STAT.
4. The hotter you run an internal combustion engine - w i t h i n r e a * o n- the more efficient it is overall. And this includes engine internal cleanliness, especially crankcase.
Okay, I agree that most of the above factors will not play too heavily with only the difference between a 180, and the 195. (however, my bet is that anyone who attempts to run a 160 on the street on a long term basis will be in for some disappointments in the long run,,)
Mostly I see it as one of those things "that isn't broken, so why are we trying to fix it
" Okay, okay, I know, "designer spark plugs" bright neon wires, and chrome plated dipsticks also make your engine run so much better, faster, better fuel economy,,,,
If the truth were known, we would probaly all be better off running an engine temp of well over 200, and full synthetic oil, etc. A couple of years ago, I did a lot of studying on cooling system engineering, design, and application. (-another whole story). I remember a person by the name of Steve Jacks, -I think his company was Concept One Pulleys,,, that had a lot of good info on the internet. Also, some other study to really give you something to think about is the "Evans Cool" information. (-a non-aqueous coolant. -ie:no water,,) I never was quite brave enough to go that far,,,,,