Is there any reason to use a hotter or cooler thermostat then factory for any reason?

Say your engine uses 195 and you use 180.

Or your engine uses a 180 degree thermostat from the factory but you want to try a 195 degree thermostat.

 

Not normally. Sometimes going colder or hotter may help. Depending on circumstances. Every car is different. If your car has an electric fan you need it to work in conjunction with the thermostat. So say your fan comes on at 205, you'd want a 195 not a 180. IMO. My car ran hotter with a 160 than with a 195. I am now running a 180, and I have no problems. Our cars were designed to run hotter from the factory. I dont really think I answered your question but maybe someone will post up with a better explanation.

 

Ditto what Undercover mentioned. The cars were designed to run 195-225* from the factory for emissions and came with a 195* thermostat. The factory fans kick on at 225. I'm running a 180* in mine...I don't have the factory motor anymore so I needed more cooling. I also have a fan switch that's set to come on at 185* to go with the thermostat. A cooler motor will run "better" performance wise once tuned properly but if you need to pass emissions where you are, you will probably need to stick with the 195*, though I'm sure some on here are running 180* with no issues. Unless your car is overheating or your running a performance motor, I really wouldn't worry about switching to a cooler thermostat.

 

Alot of folks want to think that cooler is better .... which is true to a degree. Like mentioned, can greatly impact emissions if you have to pass. Another aspect ... say you have a 195 factory stat and you swap to a 160 - the computer sees cooler than 'normal' temps, and assumes the car is cold, thus the computer richens the mixture, so you get bad emissions AND lose mileage from running too rich.

 

Do not run a 160* that was a big mistake that I made. Who makes a good 180* thermostat for the Crossfire injection?

 

are they special thermostats? I would run a 180 robert shaw. mr. gasket are the same basically. milodon also makes some.

 

no but the crossfire is a special head case

 

My 180 is a Mr. Gasket. I like them because they actually have written on them "This way front" so you can't put them in backwards.