| Not affecting anything when .0002" of ceramic does enough of a job insulating heat. There are two things going against the charge temp, the fact that its compressed and engine heat already present from combustion/exhaust. I would want to reduce those temperatures as much as possible for obvious reasons. I believe that plenum coating exists for a purpose...I don't want anything covering it except for thermal dispersant, and I certainly wouldn't polish it for a substandard finish compared to chrome that nets a possible increase in the air temp. I believe the exterior acts as a heat sink, what I don't understand is whether its beneficial to have the same type of ridges on the inside of the pipe. What would make sense to me is that such a designed pipe would prevent heat soaking of the pipe itself, at the cost of less than optimal air flow since it wouldn't be perfectly smooth. Hope someone can chime in with real data. Ceramic wouldn't be safe, all coatings eventually flake....I wonder if such a surface as seen by the SZ outlet would help in temp reduction by less heat soak, and whether this property was lost with the polishing. FWIW, I'm definitely going to do the exterior of the piping ICs and plenum eventually with the dispersant...it doesn't seem to be all that expensive.
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