Quote:
Originally Posted by AL427SBF
olddog -
Black absorbs heat. Shiny, reflective surfaces reject heat. Therefore a silver coating on the inside of the pipes would be better than black, from a performance perspective.
We all know that applies if the heat you are absorbing or reflecting is from a radiant glowing object (light source), not so sure you can apply that same logic to hot spent gases pumped into a pipe. The ceramic coating with the best insulation properties is best, and I think color has no bearing on it - it's just dye in the ceramic mix. I'm no expert that's for sure, just my opinion.
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I have worked in process control 35 yrs., and I have actually tested temp readings with air and polymers. Believe me radiant or infra red temp transfer happens everywhere all the time. It will affect the exhaust gas temp, but how much that will impact Hp is another question.