polishing exhaust ports

Eric P /
neutral4x4
Dec 07, 2008 12:08PM
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What should the finish be on the inside of an exhaust port?

I know that polishing the port reduces carbon buildup because it can't stick to a smooth surface, but does it hurt preformance?

Airplane wings actually have a rough surface to increase the flow of air over the wings.

I believe that polishing ports makes air stick to the port by increasing friction. Just think of trying to drag one piece of sheet glass over another.

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