Take 50+ year old technology for best fuel economy- Hemisperical (or close to it) combustion chamber, dual spark plugs and dual spark source like 2 magnetoes, maybe direct fuel injection or leanable light throttle carberator. You can find examples in Pratt&Whitney 14 cylinder radials. BMW /5, /6 motorcycle engines had some dual plug upgrades when worried about unleaded gas here- claimed road mileage increased 5-10% under 90mph. Ford 140 inch 4 with dual ignition advertised about same mileage gain still with carb. Central spark plug, high energy ignition and port type fuel injection nowadays getting about the best compomise of fuel economy and performance. Cadillac has/had a 8stroke ignition cycle for light load running to get fuel economy and run cool- basicly fuel injector squirted only 1/2 the time. Lots of ways to get fuel economy known- but the marketable balance of power and performance may vary between Citroen 2CV and Ford Taurus when the 75 mile speed zones for 100 miles are considered. RN
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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