I was just sharing. It’s not worth my time to give it any more thought. Thank you for the feedback.
Power goes down but efficiency often increases. Airplane engines often have a compression ratio that is optimized for 75% full power, in order to not overheat and detonate at 100% power, the fuel air mixture has to be rich. At 75% cruise power, the engine can be leaned out to near stoichiometric fuel air mixture. At an altitude where 75% power happens at full throttle, the engine is more efficient than at an altitude where 75% power happens with the throttle restricting airflow because the engine is not pumping air uphill, from a low pressure intake manifold to a high pressure exhaust manifold.
Automobile engines are also a little overcompressed at full throttle requiring a rich mixture, in order to get better fuel economy at part throttle cruise where they can run lean.
The best gas mileage I ever got out of my wife’s Honda Element happened in the mountains of New Mexico, where I got 32 mpg out of one tank of gas once. This car usually gets 22-24 mpg.
Sometimes you get an engine where everything is on the “right” side of the specifications, getting the maximum efficiency.
I had an 84 T-Bird, California emissions, it got an amazing 35 MPG in high desert driving. The car was totaled when a van ran a stop sign. I replaced it with a nearly identical 86 T-Bird, that one got 25 MPG.
Ah, the Fish carburetor.
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Please!
The manufacturer wanted it referred to as the Fish Canadian Carburetor.
Gills rather than jets?
Well, suffice it to say that it must have been very… unconventional… in order to achieve the (impossible) gas mileage that they claimed.