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This car doesn't have any sort of temperature gauge.
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So it's the 1302 in your avatar pic?
These coatings fall under the heading of aerospace technology. Another example would be
https://www.google.com/search?q=high+emissivity+coating. Raw aluminum emits heat better than the oxide coating that forms on it. So if you can prevent the oxides forming it improves the cooling. This would be applied to the outside of the heads and cylinders.
Further examples? Ceramic coatings on the inside of the exhaust system.
I have a stroker 1776 that been sitting on the bench for a while. I think it could be worth dis-assembled and reassembled before it's put into service. I'd like to try these coatings so I will be interested in your results.
What I have done is
cryogenic tempering on the brake drums and rotors that are on the car.
This process improves the wear characteristics, but also improves machinability (less tool 'chatter') and could be applied to any moving part.
Edit: ncs -- That's an interesting process. Something offered by
https://www.weddleindustries.com/services. They also have a
REM Superfinishing process that improves metal-to-metal contact.