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Originally Posted by Lil bastard
In fact, computer modeling and real-time flow bench testing has confirmed that you really want a finely roughed surface...
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Not true... you want a uniformly
polished surface. It does not have to be imperfection free, mirror "shiny" polished for every application but rough is definitely not the goal. This per one of the top companies who proprietarily performs honing service for the likes of NASCAR, NHRA, IRL, CART and SCCA as well as for OEM applications.
PowerFlow Performance
Extrude Hone uses advanced surface finishing solutions, to remove rough cast surfaces that restrict horsepower efficiency of racing/performance components. By enlarging and uniformly polishing internal air and fluid passages, flow velocity is maximized.
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