[use caution for thread drift]

Jim Rosinski wrote:

I forget the company's name, but I think they're out of Florida. They
advertise up to 23 extra horsepower. I'd say I'm getting at least 10 on
top of the 160 sea level horses the engine's rated at. Very noticeable,
and welcome when flying in the local mountains, some of which exceed
14,000 feet.

Don't konw, but I wonder. Doesn't that 160 hp rating come from the engine (not
airframe) manufacturer and doesn't it represent the maximum hp output in ideal
conditions?

Then, after the engine is rated by the engine manufacturer, the airframe
manufacturer decides what kind of exhaust system, etc it will have, and the
choice will determine how close the engine-in-the-airframe will come to
producing the theoretical power advertised by the engine manufacturer?

So would it be more accurate to say that with the modified exhaust, you might be
closer to actually producing the advertised 160 hp, rather than saying the power
is greater than 160 hp?

Notice each sentence above ends with a '?'. I'm not saying anyone is wrong, just
wondering how this horsepower rating game works, given that both the engine mfr
and the airframe mfr are making design decisions that probably affect the actual
power produced.

Dave