pittss1c wrote:
Has anyone here done or considered 10:1 pistons for an E-series O-320.
I have read the articles on how an E series differs from the others, but
I am not sure that this closes the door on the subject.
/snip/

Pitts,

I don't know all the details, but I do know the "E" series 320's have a
lighter duty front main bearing setup, as compared to the "D" models
that came with higher horsepower ratings. However, I can't say whether
the difference is that critical. How much HP do you suppose 10:1's
would produce? If you limited your takeoff MP to a degree, and just
used the extra efficiency at altitude, I can't imagine any harm being
done, at all.

Happy Flying!
Scott Skylane