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Beginner's Port and Polishing
Interesting, but as someone who spent years with a Superflow Flow bench modifying cylinder heads for the GTU and Camel Light Prototype Classes of the old IMSA racing organization and doing cylinder head quality control on heads coming into the race shop good cleanup is all that should be attempted without the use and hours upon hours of practice in front of a flow bench and test heads. A port shape should not really be changed unless you have some empirical data from actually testing a 'cut' port shape that tells you that you actually have improved the airflow at some particular point in the valve lift/acceleration curve. A good clean up of all casting flash and irregularities with a fairly textured finish (60-100 grit seems optimal). Larry Meaux has been rough texturing port surfaces with a rough carbide burr and seeing HP gains! All in all, a nice instructable.....save the $$ and buy a bench...you'll love it.
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