Quote Originally Posted by N3p View Post
It has nothing to do with racing, it has to do with keeping your car cool. Colder = less knock & the less knock you have the better. You don't have to be racing to have KR.. When people switch down to a 3.4, at the very least you should be using a COOLER range spark plugs, a COLD air intake, and a 180* t-stat which makes your car run COOLER.
I understand what you are saying about keeping your car cool. But why? A cooler car does not run better. In fact it is the complete opposite. A hotter car will run better, faster, more HP, more efficiency, etc under the same conditions.

The only thing a cooler engine will do is reduce knock IF you have knock. If you don't have knock, no reason to run a cooler t-stat. Consider Nascar. They are running engine temps around, or over 250°F. The key is setting your engine up with the appropriate mods to not have knock. Then you don't need to run a cooler t-stat to try and cheat the engine.

Again, if you can't run your car with a 3.4 pulley and a stock t-stat without getting knock, and need to revert to a cooler t-stat just so you can drive, you need more supporting mods.....not a cooler t-stat.