On 4-May-2006, "Robert M. Gary" wrote:

Ok, I'm still confused. The O-360 engine puts out 180hp on 9gal hr. The
IO-360 puts out 200 hp on 10 gal/hr. The difference between the two is
just that that IO-360 is fuel injected. So how is it that you can say
"And slightly less fuel burn than if it had a carburetor". That
certainly doesn't seem to be the case here.


In my limited experience with an O-360 in an Archer I generally planned on
burning very close to 10 GPH at 75% (of 180 hp), running as lean as possible
for smooth engine operation. In our Arrow with an IO-360, I burn about the
same, or maybe just a tiny bit more, at 75% (of 200 hp). 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.

-Elliott Drucker