The main reason the IO engine is more efficient is the compression ratio is
higher. The compression ratio is in the numerator of the efficiency formula,
so there is a direct relationship.

Karl
ATP CFI ETC
"Curator" N185KG


"Montblack" wrote in message
...
wrote)
The IO-360 thus has a lower specific fuel consumption (the per-hour fuel
flow required per hp produced). Reason: I think the main one is that
the better fuel distribution on the FI engine allows operation with a
leaner mixture.


Curious - If approval from the FAA was NOT a factor:

How difficult, practical, expensive, etc, would it be to convert an O to
an IO?

What all would be involved? What would go, what would stay, etc?

Thanks.


Montblack