Robert,

There are many, many, (over 100) variants of the Lycoming 360 engine. Your
confusion stems from your belief that you just strap FI on an O-360 and it
makes it a IO-360.

In fact ALL the 200 HP IO-360 engines have a higher compression ratio,
unless they are turbo-charged. That is the primary reason for the extra 20
HP.

Fuel injection, (even lowly port injection like on our engines) is more
efficient than a carburetor. Thus for the same power output they do so at a
lower fuel burn. That is one of the primary reasons to FI an engine.

For your amusement, surf this:
http://www.lycoming.textron.com/prod...ons/SSP204.pdf

Karl
"Curator" N185KG

"Robert M. Gary" wrote in message
ups.com...
I went through my post. No, I didn't say that.

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.

-Robert