Thread: should i get a 180 or 160 t stat?

I have a 98 gtp with a 2001 motor I wanted to start modding it but not to the exterme. I have a thrasher cold air intake and ngk plugs my next cheap mod was going to be a t stat 180 or 160. I dont wont to blow anything up or messed the car up I wont to be on the safe side. Some one said a colder t stat would hurt my car i dont think so because i used to run a 160 in my lt1 all the time and the car ran 100% better with a lower temp. My future mods are a 3.4 pulley and a 3 inch down pipe will these mods hurt my car and do I have to get it tuned

A lower * thermostat is not going to make any difference in power or how you're engine runs.


If you're going to go with one go with the 160. You will not see much of a difference with the 180 in the city.


Plus you need to change the fan temp settings in the PCM to take full advantage of the Thermostat.

Nope. It won't affect idle at all. Here is the table to prove it.

so why on zzp it says you must get a 180 stat in order to get the 3.4 pulley

Originally Posted by 98gtp1000

so why on zzp it says you must get a 180 stat in order to get the 3.4 pulley

Because ZZP is wrong.T-Stat temp has nothiong to do with performance or what size pulley you can drop to.