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3Ltriste13

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  1. Actually, painting the port a texture more smooth than wood reduces the reynolds number of the duct, thereby reducing head losses inside the duct. This translates into higher pressures at the low pressure side of the duct as compared to the rougher duct. Also, a smoother duct resists transitions into turbulent flow more effectively than a rough surface duct. Once turbulence sets in, the boundary layer size is increased and effective duct area goes waaaaay down.

    All things considered, you should have your ports as smoooth as possible, but you likely will not hear the difference except in rare cases.

    :good::trippy:

    x2 :trippy:

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