it tells you how hard the engine is working and gives you a GUIDELINE to drive by. they are about $150 and 2 hours to install. (if Proactive has the engine out then you can have the sensor installed dirt cheap).
safe guideline is 1000F post turbo and 1200F preturbo. once again this is a guideline. if you go over the prescribed guidelines you engine isn't suddenly going to go BANG but if you constantly go over then you can expect a nice large repair bill, motel rooms and upset family.
too many guys report that they drive by the temp gauge, bad idea. you can be running at 1400F and the water temp reads normal. or you can be in the red on the temp gauge and be running 1000F. there is no corilation between the 2 gauges.
anyone that says you don't need them are risk takers or just too cheap to buy one.
it is their money, their frustration and their time so what do i care.
Ursula wrote: Pyrometer:
This tells you what the temperature of the exhaust is?
This will let you know if the engine is working harder than normal? is that right? What are the pros and cons/cost of having one installed? Could someone direct me to a thread about them?