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Old 02-11-2003, 12:58 PM
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Post Smoothe up intake runners or not?

I just bought a performer rpm air gap intake and was wandering if i should smooth up the runners or not?

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Old 02-11-2003, 03:19 PM
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i would think its not really necessary if its just going to be driven on the street. If you want to port it, then i could see polishing them or something. You probably wouldnt be able to tell a difference.
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Old 02-11-2003, 05:05 PM
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Well I dont know if it really made a difference, but I did it to mine. I didnt really take them to a mirror finish, but mostly got rid of the imperfections. Take a close look at the water passage too, mine had a lot of burrs there that needed attention. I knocked them down a little with a dremel and sanding drum, and then smoothed em out with cloth-backed sand paper.
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Old 02-12-2003, 01:26 PM
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Hey man,

All I would do is gasket match the intake to the cylinder head, you don't want to polish it because you need to keep up boundary layer agitation to keep the fuel in suspension so that it doesn't puddle, keeping the fuel atomized is one of the keys to complete combustion, the smaller the droplets, the less time it takes to burn the gases in the combustion chamber, thereby avoiding detonatin problems.

word up.

keep on roddin' <img src="graemlins/pimp.gif" border="0" alt="[pimp]" />
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Old 02-13-2003, 03:16 PM
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HRM said that the performer rpm air gap is the most closely matched to gasket size intake sold on the market today NOT needing to be port matched at all, but couldn't hoit to clean up any flashings or other imperfections, if there are any.
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Old 02-13-2003, 03:21 PM
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Ive allways been told to take imperfections out but leave the walls rough because it keeps turbulance up. Now exaust ports can be polished i believe.
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