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In the air conditioing world, there is a coil mfg that claims better heat transfer with rifled tubing in there evaporators. I think it would only increase the flow of exhaust gas mass to the tube wall and lower the gas temperature due to contact and increase heat transfer. A hotter gas flows faster towards a colder area. my .02c

Chris
 

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In the air conditioing world, there is a coil mfg that claims better heat transfer with rifled tubing in there evaporators. I think it would only increase the flow of exhaust gas mass to the tube wall and lower the gas temperature due to contact and increase heat transfer. A hotter gas flows faster towards a colder area. my .02c

Chris
Thanks. Just a thought.
 

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Dumb question maybe but, would that increase inside surface area?
 

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In the air conditioing world, there is a coil mfg that claims better heat transfer with rifled tubing in there evaporators. I think it would only increase the flow of exhaust gas mass to the tube wall and lower the gas temperature due to contact and increase heat transfer. A hotter gas flows faster towards a colder area. my .02c

Chris

I should think scavenge efficiency would be the desired result. In that case tuning primary tube diameter and the venturi diameter of the merge collector should yield a power gain. Combustion chamber and camshaft overlap play a roll too.
 

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I should think scavenge efficiency would be the desired result. In that case tuning primary tube diameter and the venturi diameter of the merge collector should yield a power gain. Combustion chamber and camshaft overlap play a roll too.
I was explaining the a/c manufacturers reasoning for doing it as it was told to me. It seemed like it pertained to this.

Chris
 
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