I'm totally OLD school and seriously, in Arizona, a colder Tstat in 114* weather isn't going to help all that much, lol.


I've seen plenty of posts about the engine running at the correct temp, but have yet to see anything backing it up (dyno). Personally, I think the IAT is going to effect your gas usage more than the engine (coolant) temp. Furthermore, running a smaller pulley will further distance the combined effect of coolant vs air temp with regard to fueling. Once modded and spinning that SC faster (pulley), is going to negate any effect of a cooler Tstat, or what a cooler Tstat can do. But like I said, I am totally old school, I like keeping my engine cooler. For the record, has been done way before 97'... My 73' Grand Am had a drilled colder Tstat which was totally removed in the summer.


Just looking for an expansion on your logic Bio, I'm always learning and these are all just my opinion of course : )