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> Polish Air Casing, to increase air flow
solex
post Oct 4 2007, 09:24 PM
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Anyone know if it helps to polish (deburr) the air casing to increase air flow?

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Brian Mifsud
post Oct 5 2007, 11:38 AM
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QUOTE(solex @ Oct 4 2007, 08:24 PM) *

Anyone know if it helps to polish (deburr) the air casing to increase air flow?



If you are talking about the cast aluminum enclosure for the engine cooling blower, and it's ductwork, the answer is a big fat YES, flow will increase. It will decrease the system resistance to flow. As long as you don't go relocating any of the major interior contours or metering/steering vanes, the proportional distribution of the air flow will remain the same, but the volume will increase. Same is true for the blower impeller itself. Clean it up and deburr/polish away to your heart's content.

It is only when the discussion turns to the intake manifold and heads when roughness and air tumbling are important NOT to polish away. The direction of air flow as well as quantity and speed are all very important in combustion.

For the cooling system, all you will be affecting is the velocity (speeding it up).. so it only helps the situation.

I've got 15 years of air cooling system design to back up what I say so questions are very welcome.

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