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Re: Supercharger for my Apache
is the oil moving in the supercharger? can you add a plate cooler and pump (if splash oiling)? convection is just a terrible method of cooling without significant fins or surface area. if you are really looking for max gains by convection, get the black paint off (not because its black, but because it smooths the surface) and you can even sandblast or glass bead the case for more surface area. I would almost bet the 4 degree difference (duct/no duct) could be attributed to ambient changes other than temperature (sun angle for example)
your duct only works when you are moving, temps will spike when you come to a stoplight because the heat soak will reach equilibrium (the oil will be as hot as the case with enough time). I remember doing heat soak analysis on an aircraft cabin, the cabin of an unattended aircraft parked on the tarmac would eventually reach max temperature without some kind of airflow, insulation and window shades just extended the amount of time it took.
anyway, fascinating project!
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