My machine shop told me that they will lose their temper from being run too hot, his opinion of hot was over 900. I know a few guys with turned up semis that wont go over 900 either for the same reason. Granted, thats 900 after the turbo, so considerably cooler than what would be in the manifold or even up pipe.

 

So what is 900 degrees post turbo equal to in the manifold.?

 

The rule of thumb ive always heard is 200, so, i guess that would make it 1100* in the manifold. Would be curious to know of a first hand where someone has two in the different spots. I would vary with setup, due to drive pressure and distance, so its hard to say a real number.

 

And post-turbo is lower yet. Makes it difficult to know much of anything.
Anyone have any idea how accurate the thermocouples are? I mean if their tolerance is 100 degrees C at say, 1500 degrees C or if the tolerance is closer to 10 degrees? With most thermometers you can use ice-point and boiling point of water to judge the accuracy, but that doesn't work when you are nearing 1000 degrees C instead of 100 degrees C.

 

K-type thermocouples are rated at like 0.75% or 2.2C, which ever is higher. According to google.
This would be something like +-9F at 1200F... not enough to worry about

BTW, be aware of F vs C. 1000C = 1832F; 1000F = 538C
You want to be around 1200F absolute max, not 1200C.

Also, going back to "how high is too high":
Banks Sidewinder Turbo | Banks Power
1150F being a "stock" N/A measurement, and probably a good max.
Either way, it just goes to show how good a turbo on an IDI is - more speed, more power and lower EGTs too!

 

All good information.
Thanks for posting it.