Quote:
Originally Posted by Bob Bidonde
Porting is not reversible and it reduces the compression ratio. For a street runner, I doubt porting is of any significant value, but I am guessing.
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What Bob has pictured is a ported AND RELIEVED flathead V8. In them relieving does reduce the compression ratio, relieving is not needed in our A's because in the V8, the valves are not parallel to the cylinders.