One of the circle track motor building articles I read showed the top
of a piston that had been dimpled (looked like with a center
punch). The idea, as I recall it, was to promote more "swirl" in the
combustion chamber.
- Tony
At 02:10 PM 2/28/2009, Terry Stetler wrote:
>Perhaps the term "port shaping" would better describe what is necessary?
>
>Also, it would seem that if you could put a uniform surface texture along the
>entire port, that would guarantee laminar flow, much as the dimples on a golf
>ball do, that would be the way to go. But now we are getting into the black
>arts, and gray areas of the GCR, etc...
>
>Terry Stetler
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