Originally Posted by ddavis
The thermostat controls when your coolant is flowing into the engine. It blocks the coolant from the engine until it reaches a certain temperature, then it opens up to let coolant in. This lets your engine warm up faster and keeps your engine running at the temperature you want. Same as a house thermostat. I run a 160deg in mine. Alot of guys debate rather to run a colder one or not. Ive always ran them in my cars with no problems and my tuner recommended it so i put one in. Theres a few debate threads about them on the forum
Yes, what he said. My tuner recommended the 16o so I went with it. The difference is running 190 on the freeway to 178 if I remember correctly. It will help keep your car cooler in traffic. Ask your tuner and especially your engine builder for advise on this one.