Larry, I mis-spoke (Notching the piston for power)

[rocco16 at sbcglobal.net (Larry Fry)]

This sounds very much like the old racers trick of drilling the edge of the
piston with the hole going into the top ring land.  The theory behind this
was that it provided a "direct" path for combustion pressure to force the
top ring agains the cylinder wall with greater force, providing a better
seal/more power.
  This theory was around for a long time (as was the practice) but, to my
knowledge, was never substantiated through scientific comparisons.  The fact
that it isn't popular any longer tells me that there was little real basis
for the theory.
Another old wives tale, in other words.
Larry


> Larry, et al..
>   I asked Don yesterday about this, as I remembered that he experimented
> with it a few times...  The gain is not to be found with a line across the
> piston, but rather dimples, or round holes...  Apparently, NASCAR has for
> sometime dimpled the piston, the cumbustion chamber, and the inside of the
> intake runners for power...  This works considering the idea of a golf
ball,
> and how one with dimples goes much further than one without.  OR, the fact
> that a jetliner with hail damage will have a higher top speed...
>
> So Larry, there you go.  I debunked myself and did the work for you...  :)
>
> Cheers,
>   David
>
>
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